./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:05:31,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:05:31,707 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:05:31,711 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:05:31,712 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:05:31,737 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:05:31,737 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:05:31,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:05:31,753 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:05:31,753 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:05:31,754 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:05:31,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:05:31,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:05:31,755 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:05:31,755 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:05:31,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:05:31,755 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:05:31,756 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:05:31,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:05:31,756 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:05:31,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:05:31,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:05:31,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:05:31,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:05:31,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:05:31,760 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:05:31,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:05:31,760 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:05:31,761 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:05:31,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:05:31,762 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:05:31,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:05:31,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:05:31,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:05:31,763 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:05:31,763 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:05:31,763 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:05:31,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:05:31,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:05:31,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:05:31,764 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:05:31,764 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:05:31,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:05:31,764 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:05:31,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:05:31,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:05:31,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:05:31,955 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:05:31,955 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:05:31,956 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:05:32,900 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:05:33,123 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:05:33,124 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:05:33,143 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e1f9159/85f6526beb9d454ca0bca7a1367c9563/FLAG85d1bfd47 [2024-06-21 17:05:33,156 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9e1f9159/85f6526beb9d454ca0bca7a1367c9563 [2024-06-21 17:05:33,158 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:05:33,159 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:05:33,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi000_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 17:05:33,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:05:33,298 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:05:33,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:05:33,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:05:33,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:05:33,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:05:33" (1/2) ... [2024-06-21 17:05:33,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85e1837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:33, skipping insertion in model container [2024-06-21 17:05:33,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:05:33" (1/2) ... [2024-06-21 17:05:33,306 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f8a6553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:05:33, skipping insertion in model container [2024-06-21 17:05:33,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:05:33" (2/2) ... [2024-06-21 17:05:33,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85e1837 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33, skipping insertion in model container [2024-06-21 17:05:33,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:05:33" (2/2) ... [2024-06-21 17:05:33,317 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:05:33,364 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:05:33,365 INFO L97 edCorrectnessWitness]: Location invariant before [L804-L804] ((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) [2024-06-21 17:05:33,365 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((((((((! multithreaded || x$read_delayed_var == 0) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1) || __unbuffered_p1_EBX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) [2024-06-21 17:05:33,366 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:05:33,366 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-21 17:05:33,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:05:33,650 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:05:33,666 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:05:33,753 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:05:33,785 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:05:33,786 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33 WrapperNode [2024-06-21 17:05:33,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:05:33,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:05:33,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:05:33,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:05:33,792 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 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,821 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 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,852 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-21 17:05:33,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:05:33,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:05:33,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:05:33,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:05:33,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,888 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:05:33,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:05:33,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:05:33,924 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:05:33,924 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:05:33,925 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (1/1) ... [2024-06-21 17:05:33,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:05:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:05:33,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:05:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:05:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:05:33,977 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:05:33,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:05:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:05:33,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:05:33,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:05:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:05:33,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:05:33,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:05:33,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:05:33,981 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:05:34,111 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:05:34,113 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:05:34,404 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:05:34,404 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:05:34,551 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:05:34,551 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:05:34,553 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:05:34 BoogieIcfgContainer [2024-06-21 17:05:34,553 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:05:34,555 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:05:34,555 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:05:34,558 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:05:34,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:05:33" (1/4) ... [2024-06-21 17:05:34,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c2e7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:05:34, skipping insertion in model container [2024-06-21 17:05:34,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:05:33" (2/4) ... [2024-06-21 17:05:34,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c2e7ea and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:05:34, skipping insertion in model container [2024-06-21 17:05:34,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:05:33" (3/4) ... [2024-06-21 17:05:34,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c2e7ea and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:05:34, skipping insertion in model container [2024-06-21 17:05:34,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:05:34" (4/4) ... [2024-06-21 17:05:34,566 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:05:34,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:05:34,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 17:05:34,582 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:05:34,632 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:05:34,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 17:05:34,684 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 17:05:34,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:05:34,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:05:34,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 17:05:34,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 17:05:34,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:05:34,709 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;@79ae5f7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:05:34,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 17:05:34,712 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:05:34,712 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:05:34,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:05:34,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:34,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:05:34,714 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:34,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash 328598881, now seen corresponding path program 1 times [2024-06-21 17:05:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093094449] [2024-06-21 17:05:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:35,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:35,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093094449] [2024-06-21 17:05:35,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093094449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:35,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:35,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:05:35,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048263453] [2024-06-21 17:05:35,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:35,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:05:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:35,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:05:35,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:05:35,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 17:05:35,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:35,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:35,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 17:05:35,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:35,588 INFO L124 PetriNetUnfolderBase]: 162/316 cut-off events. [2024-06-21 17:05:35,589 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 17:05:35,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 316 events. 162/316 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1171 event pairs, 97 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 616. Up to 288 conditions per place. [2024-06-21 17:05:35,594 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 17:05:35,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 115 flow [2024-06-21 17:05:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:05:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:05:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-21 17:05:35,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-06-21 17:05:35,605 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-06-21 17:05:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 115 flow [2024-06-21 17:05:35,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 17:05:35,608 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 17:05:35,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 17:05:35,613 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 17:05:35,613 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 17:05:35,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:35,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:35,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:35,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:05:35,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:35,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2044034496, now seen corresponding path program 1 times [2024-06-21 17:05:35,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:35,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108848562] [2024-06-21 17:05:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:35,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:35,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:35,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108848562] [2024-06-21 17:05:35,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108848562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:35,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:35,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:05:35,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307669391] [2024-06-21 17:05:35,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:35,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:05:35,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:05:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:05:35,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 17:05:35,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:35,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:35,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 17:05:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:36,095 INFO L124 PetriNetUnfolderBase]: 213/381 cut-off events. [2024-06-21 17:05:36,095 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-06-21 17:05:36,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 381 events. 213/381 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1345 event pairs, 109 based on Foata normal form. 2/382 useless extension candidates. Maximal degree in co-relation 865. Up to 364 conditions per place. [2024-06-21 17:05:36,100 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 17:05:36,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 161 flow [2024-06-21 17:05:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:05:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:05:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2024-06-21 17:05:36,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:05:36,104 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 62 transitions. [2024-06-21 17:05:36,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 161 flow [2024-06-21 17:05:36,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:05:36,109 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 17:05:36,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 17:05:36,110 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 17:05:36,110 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 17:05:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:36,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:36,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:05:36,112 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:36,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:36,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1059440774, now seen corresponding path program 1 times [2024-06-21 17:05:36,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:36,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772744925] [2024-06-21 17:05:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:36,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:36,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772744925] [2024-06-21 17:05:36,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772744925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:36,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:36,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:05:36,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860535213] [2024-06-21 17:05:36,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:36,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:05:36,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:05:36,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:05:36,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 17:05:36,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:36,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:36,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 17:05:36,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:36,631 INFO L124 PetriNetUnfolderBase]: 207/371 cut-off events. [2024-06-21 17:05:36,631 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-21 17:05:36,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 371 events. 207/371 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1274 event pairs, 61 based on Foata normal form. 4/374 useless extension candidates. Maximal degree in co-relation 930. Up to 336 conditions per place. [2024-06-21 17:05:36,633 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-21 17:05:36,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 213 flow [2024-06-21 17:05:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:05:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:05:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-21 17:05:36,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2024-06-21 17:05:36,636 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 76 transitions. [2024-06-21 17:05:36,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 213 flow [2024-06-21 17:05:36,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 204 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 17:05:36,638 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-21 17:05:36,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-21 17:05:36,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 17:05:36,640 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-21 17:05:36,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:36,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:36,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:36,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:05:36,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:36,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1503579947, now seen corresponding path program 1 times [2024-06-21 17:05:36,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:36,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926890437] [2024-06-21 17:05:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:36,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:37,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926890437] [2024-06-21 17:05:37,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926890437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:37,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:37,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:37,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517531262] [2024-06-21 17:05:37,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 17:05:37,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:37,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:37,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 17:05:37,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:37,512 INFO L124 PetriNetUnfolderBase]: 203/363 cut-off events. [2024-06-21 17:05:37,513 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-06-21 17:05:37,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 363 events. 203/363 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1228 event pairs, 36 based on Foata normal form. 4/366 useless extension candidates. Maximal degree in co-relation 990. Up to 310 conditions per place. [2024-06-21 17:05:37,514 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-21 17:05:37,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 227 flow [2024-06-21 17:05:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-21 17:05:37,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 17:05:37,516 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 6 states and 84 transitions. [2024-06-21 17:05:37,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 227 flow [2024-06-21 17:05:37,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 212 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:37,517 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 116 flow [2024-06-21 17:05:37,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2024-06-21 17:05:37,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-21 17:05:37,518 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 116 flow [2024-06-21 17:05:37,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:37,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:37,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:37,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:05:37,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:37,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash -57901863, now seen corresponding path program 1 times [2024-06-21 17:05:37,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:37,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522800121] [2024-06-21 17:05:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:37,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:37,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:37,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522800121] [2024-06-21 17:05:37,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522800121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:37,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:37,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:05:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000401951] [2024-06-21 17:05:37,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:37,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:05:37,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:05:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:05:37,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 17:05:37,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:37,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:37,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 17:05:37,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:38,048 INFO L124 PetriNetUnfolderBase]: 147/294 cut-off events. [2024-06-21 17:05:38,049 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-21 17:05:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 294 events. 147/294 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1053 event pairs, 53 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 804. Up to 259 conditions per place. [2024-06-21 17:05:38,050 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 25 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2024-06-21 17:05:38,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 196 flow [2024-06-21 17:05:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:05:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:05:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-06-21 17:05:38,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 17:05:38,051 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 116 flow. Second operand 5 states and 63 transitions. [2024-06-21 17:05:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 196 flow [2024-06-21 17:05:38,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 176 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:38,053 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 123 flow [2024-06-21 17:05:38,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-21 17:05:38,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 17:05:38,054 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 123 flow [2024-06-21 17:05:38,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:38,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:38,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:38,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:05:38,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:38,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1794956527, now seen corresponding path program 1 times [2024-06-21 17:05:38,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:38,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428554504] [2024-06-21 17:05:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:38,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:38,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428554504] [2024-06-21 17:05:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428554504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:38,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21138547] [2024-06-21 17:05:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:38,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:38,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:38,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:38,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:38,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:38,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:38,620 INFO L124 PetriNetUnfolderBase]: 203/365 cut-off events. [2024-06-21 17:05:38,620 INFO L125 PetriNetUnfolderBase]: For 708/710 co-relation queries the response was YES. [2024-06-21 17:05:38,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 365 events. 203/365 cut-off events. For 708/710 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1261 event pairs, 74 based on Foata normal form. 4/368 useless extension candidates. Maximal degree in co-relation 1086. Up to 327 conditions per place. [2024-06-21 17:05:38,622 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 29 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-06-21 17:05:38,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 253 flow [2024-06-21 17:05:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-06-21 17:05:38,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:05:38,623 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 123 flow. Second operand 6 states and 68 transitions. [2024-06-21 17:05:38,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 253 flow [2024-06-21 17:05:38,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 242 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:38,625 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 180 flow [2024-06-21 17:05:38,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-21 17:05:38,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-06-21 17:05:38,626 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 180 flow [2024-06-21 17:05:38,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:38,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:38,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:38,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:05:38,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:38,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:38,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1239073528, now seen corresponding path program 1 times [2024-06-21 17:05:38,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:38,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540096933] [2024-06-21 17:05:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:38,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:38,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:38,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540096933] [2024-06-21 17:05:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540096933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:38,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:38,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:38,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078544758] [2024-06-21 17:05:38,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:38,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:38,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:39,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:39,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 180 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:39,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:39,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:39,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:39,159 INFO L124 PetriNetUnfolderBase]: 210/377 cut-off events. [2024-06-21 17:05:39,159 INFO L125 PetriNetUnfolderBase]: For 1014/1014 co-relation queries the response was YES. [2024-06-21 17:05:39,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 377 events. 210/377 cut-off events. For 1014/1014 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1294 event pairs, 75 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1277. Up to 354 conditions per place. [2024-06-21 17:05:39,162 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 38 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2024-06-21 17:05:39,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 336 flow [2024-06-21 17:05:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:39,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 17:05:39,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456221198156682 [2024-06-21 17:05:39,165 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 180 flow. Second operand 7 states and 75 transitions. [2024-06-21 17:05:39,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 336 flow [2024-06-21 17:05:39,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 322 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:05:39,169 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 235 flow [2024-06-21 17:05:39,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-21 17:05:39,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2024-06-21 17:05:39,170 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 235 flow [2024-06-21 17:05:39,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:39,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:39,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:39,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:05:39,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:39,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:39,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1646536706, now seen corresponding path program 2 times [2024-06-21 17:05:39,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:39,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046345813] [2024-06-21 17:05:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:39,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046345813] [2024-06-21 17:05:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046345813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:39,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:39,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:39,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89552241] [2024-06-21 17:05:39,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:39,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:39,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:39,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:39,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 235 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:39,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:39,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:39,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:39,728 INFO L124 PetriNetUnfolderBase]: 213/382 cut-off events. [2024-06-21 17:05:39,728 INFO L125 PetriNetUnfolderBase]: For 1348/1348 co-relation queries the response was YES. [2024-06-21 17:05:39,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 382 events. 213/382 cut-off events. For 1348/1348 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1317 event pairs, 74 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 1386. Up to 356 conditions per place. [2024-06-21 17:05:39,730 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 37 selfloop transitions, 12 changer transitions 0/51 dead transitions. [2024-06-21 17:05:39,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 374 flow [2024-06-21 17:05:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-06-21 17:05:39,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:05:39,732 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 235 flow. Second operand 6 states and 66 transitions. [2024-06-21 17:05:39,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 374 flow [2024-06-21 17:05:39,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 353 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:39,734 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 269 flow [2024-06-21 17:05:39,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-06-21 17:05:39,735 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-21 17:05:39,735 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 269 flow [2024-06-21 17:05:39,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:39,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:39,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:39,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:05:39,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:39,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:39,736 INFO L85 PathProgramCache]: Analyzing trace with hash -390902398, now seen corresponding path program 3 times [2024-06-21 17:05:39,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:39,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664997944] [2024-06-21 17:05:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:39,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:40,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664997944] [2024-06-21 17:05:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664997944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:40,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:40,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:05:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943405022] [2024-06-21 17:05:40,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:40,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:05:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:05:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:05:40,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:40,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:40,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:40,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:40,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:40,245 INFO L124 PetriNetUnfolderBase]: 208/375 cut-off events. [2024-06-21 17:05:40,245 INFO L125 PetriNetUnfolderBase]: For 1694/1696 co-relation queries the response was YES. [2024-06-21 17:05:40,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 375 events. 208/375 cut-off events. For 1694/1696 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1290 event pairs, 77 based on Foata normal form. 4/378 useless extension candidates. Maximal degree in co-relation 1393. Up to 329 conditions per place. [2024-06-21 17:05:40,248 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 31 selfloop transitions, 16 changer transitions 0/49 dead transitions. [2024-06-21 17:05:40,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 379 flow [2024-06-21 17:05:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:05:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:05:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-06-21 17:05:40,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 17:05:40,249 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 269 flow. Second operand 6 states and 67 transitions. [2024-06-21 17:05:40,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 379 flow [2024-06-21 17:05:40,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 349 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:40,251 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 278 flow [2024-06-21 17:05:40,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2024-06-21 17:05:40,252 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 17:05:40,252 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 278 flow [2024-06-21 17:05:40,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:40,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:40,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:40,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:05:40,253 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:40,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash 190923768, now seen corresponding path program 1 times [2024-06-21 17:05:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398800000] [2024-06-21 17:05:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:40,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:40,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398800000] [2024-06-21 17:05:40,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398800000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:40,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:40,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:40,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190030792] [2024-06-21 17:05:40,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:40,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:40,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:40,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:40,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 278 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:40,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:40,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:40,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:40,853 INFO L124 PetriNetUnfolderBase]: 209/377 cut-off events. [2024-06-21 17:05:40,853 INFO L125 PetriNetUnfolderBase]: For 1626/1628 co-relation queries the response was YES. [2024-06-21 17:05:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 377 events. 209/377 cut-off events. For 1626/1628 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1318 event pairs, 75 based on Foata normal form. 4/380 useless extension candidates. Maximal degree in co-relation 1397. Up to 319 conditions per place. [2024-06-21 17:05:40,855 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 22 changer transitions 0/56 dead transitions. [2024-06-21 17:05:40,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 446 flow [2024-06-21 17:05:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 17:05:40,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 17:05:40,857 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 278 flow. Second operand 7 states and 78 transitions. [2024-06-21 17:05:40,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 446 flow [2024-06-21 17:05:40,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 401 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:40,859 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 313 flow [2024-06-21 17:05:40,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=313, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-21 17:05:40,861 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-21 17:05:40,863 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 313 flow [2024-06-21 17:05:40,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:40,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:40,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:40,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:05:40,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:40,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1947143788, now seen corresponding path program 1 times [2024-06-21 17:05:40,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:40,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404416718] [2024-06-21 17:05:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:40,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:41,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:41,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404416718] [2024-06-21 17:05:41,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404416718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:41,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959876908] [2024-06-21 17:05:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:41,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:41,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:41,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:41,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:41,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:41,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:41,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:41,493 INFO L124 PetriNetUnfolderBase]: 215/386 cut-off events. [2024-06-21 17:05:41,493 INFO L125 PetriNetUnfolderBase]: For 1971/1971 co-relation queries the response was YES. [2024-06-21 17:05:41,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 386 events. 215/386 cut-off events. For 1971/1971 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1347 event pairs, 50 based on Foata normal form. 2/387 useless extension candidates. Maximal degree in co-relation 1511. Up to 339 conditions per place. [2024-06-21 17:05:41,495 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 50 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-21 17:05:41,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 497 flow [2024-06-21 17:05:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 17:05:41,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 17:05:41,496 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 313 flow. Second operand 7 states and 79 transitions. [2024-06-21 17:05:41,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 497 flow [2024-06-21 17:05:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:41,499 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 347 flow [2024-06-21 17:05:41,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=347, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-06-21 17:05:41,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-21 17:05:41,499 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 347 flow [2024-06-21 17:05:41,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:41,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:41,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:41,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:05:41,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:41,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 589797070, now seen corresponding path program 2 times [2024-06-21 17:05:41,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:41,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081063303] [2024-06-21 17:05:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:41,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:41,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:41,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081063303] [2024-06-21 17:05:41,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081063303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:41,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:41,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173527824] [2024-06-21 17:05:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:41,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:41,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:41,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:41,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 347 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:41,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:41,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:41,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:42,128 INFO L124 PetriNetUnfolderBase]: 226/404 cut-off events. [2024-06-21 17:05:42,129 INFO L125 PetriNetUnfolderBase]: For 2519/2519 co-relation queries the response was YES. [2024-06-21 17:05:42,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1747 conditions, 404 events. 226/404 cut-off events. For 2519/2519 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1428 event pairs, 50 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1717. Up to 339 conditions per place. [2024-06-21 17:05:42,132 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 19 changer transitions 0/69 dead transitions. [2024-06-21 17:05:42,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 567 flow [2024-06-21 17:05:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 17:05:42,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 17:05:42,134 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 347 flow. Second operand 7 states and 80 transitions. [2024-06-21 17:05:42,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 567 flow [2024-06-21 17:05:42,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 69 transitions, 548 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:42,138 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 404 flow [2024-06-21 17:05:42,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-21 17:05:42,139 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 17:05:42,139 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 404 flow [2024-06-21 17:05:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:42,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:42,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:42,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:05:42,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:42,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash 89491234, now seen corresponding path program 3 times [2024-06-21 17:05:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:42,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84011596] [2024-06-21 17:05:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:42,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84011596] [2024-06-21 17:05:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84011596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:42,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:42,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:42,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356834767] [2024-06-21 17:05:42,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:42,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:42,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:42,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:42,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:42,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:42,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 404 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:42,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:42,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:42,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:42,762 INFO L124 PetriNetUnfolderBase]: 228/410 cut-off events. [2024-06-21 17:05:42,762 INFO L125 PetriNetUnfolderBase]: For 3143/3143 co-relation queries the response was YES. [2024-06-21 17:05:42,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 410 events. 228/410 cut-off events. For 3143/3143 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1474 event pairs, 59 based on Foata normal form. 4/413 useless extension candidates. Maximal degree in co-relation 1799. Up to 288 conditions per place. [2024-06-21 17:05:42,764 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 47 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2024-06-21 17:05:42,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 71 transitions, 626 flow [2024-06-21 17:05:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 17:05:42,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-21 17:05:42,765 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 404 flow. Second operand 7 states and 82 transitions. [2024-06-21 17:05:42,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 71 transitions, 626 flow [2024-06-21 17:05:42,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 605 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:42,769 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 473 flow [2024-06-21 17:05:42,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=473, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2024-06-21 17:05:42,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-21 17:05:42,769 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 473 flow [2024-06-21 17:05:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:42,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:42,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:42,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:05:42,770 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:42,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1623670800, now seen corresponding path program 1 times [2024-06-21 17:05:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:42,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348669514] [2024-06-21 17:05:42,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:42,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:43,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:43,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348669514] [2024-06-21 17:05:43,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348669514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:43,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:43,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:43,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046002344] [2024-06-21 17:05:43,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:43,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:43,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:43,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:43,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:43,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 473 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:43,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:43,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:43,432 INFO L124 PetriNetUnfolderBase]: 229/411 cut-off events. [2024-06-21 17:05:43,433 INFO L125 PetriNetUnfolderBase]: For 3403/3407 co-relation queries the response was YES. [2024-06-21 17:05:43,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1938 conditions, 411 events. 229/411 cut-off events. For 3403/3407 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1463 event pairs, 51 based on Foata normal form. 6/416 useless extension candidates. Maximal degree in co-relation 1905. Up to 340 conditions per place. [2024-06-21 17:05:43,435 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 47 selfloop transitions, 26 changer transitions 0/75 dead transitions. [2024-06-21 17:05:43,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 695 flow [2024-06-21 17:05:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 17:05:43,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:05:43,436 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 473 flow. Second operand 8 states and 88 transitions. [2024-06-21 17:05:43,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 695 flow [2024-06-21 17:05:43,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 665 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:43,440 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 537 flow [2024-06-21 17:05:43,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=537, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2024-06-21 17:05:43,441 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 17:05:43,441 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 537 flow [2024-06-21 17:05:43,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:43,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:43,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:43,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:05:43,441 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:43,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash -757234403, now seen corresponding path program 1 times [2024-06-21 17:05:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:43,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102135605] [2024-06-21 17:05:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:44,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102135605] [2024-06-21 17:05:44,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102135605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:44,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:44,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360372369] [2024-06-21 17:05:44,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:44,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:44,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:44,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:44,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 537 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:44,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:44,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:44,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:44,318 INFO L124 PetriNetUnfolderBase]: 227/407 cut-off events. [2024-06-21 17:05:44,318 INFO L125 PetriNetUnfolderBase]: For 3676/3676 co-relation queries the response was YES. [2024-06-21 17:05:44,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 407 events. 227/407 cut-off events. For 3676/3676 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1431 event pairs, 48 based on Foata normal form. 1/407 useless extension candidates. Maximal degree in co-relation 1977. Up to 357 conditions per place. [2024-06-21 17:05:44,321 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 62 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-21 17:05:44,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 729 flow [2024-06-21 17:05:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 17:05:44,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 17:05:44,322 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 537 flow. Second operand 7 states and 79 transitions. [2024-06-21 17:05:44,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 729 flow [2024-06-21 17:05:44,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 692 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:44,327 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 538 flow [2024-06-21 17:05:44,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-06-21 17:05:44,327 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 17:05:44,327 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 538 flow [2024-06-21 17:05:44,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:44,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:44,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:44,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:05:44,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:44,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:44,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1414675588, now seen corresponding path program 1 times [2024-06-21 17:05:44,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:44,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424932110] [2024-06-21 17:05:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:44,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:44,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:44,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424932110] [2024-06-21 17:05:44,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424932110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:44,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:44,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:44,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992464787] [2024-06-21 17:05:44,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:44,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:44,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:44,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:44,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:44,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:44,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 538 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:44,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:44,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:44,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:44,989 INFO L124 PetriNetUnfolderBase]: 233/419 cut-off events. [2024-06-21 17:05:44,989 INFO L125 PetriNetUnfolderBase]: For 4339/4343 co-relation queries the response was YES. [2024-06-21 17:05:44,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2106 conditions, 419 events. 233/419 cut-off events. For 4339/4343 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1512 event pairs, 53 based on Foata normal form. 6/424 useless extension candidates. Maximal degree in co-relation 2069. Up to 362 conditions per place. [2024-06-21 17:05:44,993 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-21 17:05:44,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 746 flow [2024-06-21 17:05:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 17:05:44,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 17:05:44,994 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 538 flow. Second operand 7 states and 78 transitions. [2024-06-21 17:05:44,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 746 flow [2024-06-21 17:05:45,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 708 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:45,003 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 555 flow [2024-06-21 17:05:45,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2024-06-21 17:05:45,003 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-21 17:05:45,004 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 555 flow [2024-06-21 17:05:45,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:45,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:45,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:45,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:05:45,005 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:45,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash -171606738, now seen corresponding path program 2 times [2024-06-21 17:05:45,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:45,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853641198] [2024-06-21 17:05:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:45,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853641198] [2024-06-21 17:05:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853641198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:45,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:45,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:45,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853018056] [2024-06-21 17:05:45,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:45,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:45,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:45,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:45,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 555 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:45,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:45,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:45,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:45,553 INFO L124 PetriNetUnfolderBase]: 244/437 cut-off events. [2024-06-21 17:05:45,554 INFO L125 PetriNetUnfolderBase]: For 5045/5045 co-relation queries the response was YES. [2024-06-21 17:05:45,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 437 events. 244/437 cut-off events. For 5045/5045 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1600 event pairs, 59 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 2213. Up to 307 conditions per place. [2024-06-21 17:05:45,556 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 53 selfloop transitions, 29 changer transitions 0/84 dead transitions. [2024-06-21 17:05:45,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 84 transitions, 853 flow [2024-06-21 17:05:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-21 17:05:45,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-21 17:05:45,558 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 555 flow. Second operand 7 states and 83 transitions. [2024-06-21 17:05:45,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 84 transitions, 853 flow [2024-06-21 17:05:45,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 818 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:45,565 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 624 flow [2024-06-21 17:05:45,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=624, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2024-06-21 17:05:45,566 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-21 17:05:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 624 flow [2024-06-21 17:05:45,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:45,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:45,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:05:45,566 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:45,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash -171601158, now seen corresponding path program 3 times [2024-06-21 17:05:45,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:45,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008335334] [2024-06-21 17:05:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:45,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008335334] [2024-06-21 17:05:45,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008335334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:45,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:45,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:45,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859196919] [2024-06-21 17:05:45,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:45,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:45,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:45,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:46,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:46,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 624 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:46,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:46,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:46,167 INFO L124 PetriNetUnfolderBase]: 240/431 cut-off events. [2024-06-21 17:05:46,167 INFO L125 PetriNetUnfolderBase]: For 5407/5407 co-relation queries the response was YES. [2024-06-21 17:05:46,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 431 events. 240/431 cut-off events. For 5407/5407 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1571 event pairs, 56 based on Foata normal form. 2/432 useless extension candidates. Maximal degree in co-relation 2229. Up to 304 conditions per place. [2024-06-21 17:05:46,171 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 33 changer transitions 0/83 dead transitions. [2024-06-21 17:05:46,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 83 transitions, 850 flow [2024-06-21 17:05:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-21 17:05:46,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824884792626728 [2024-06-21 17:05:46,172 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 624 flow. Second operand 7 states and 83 transitions. [2024-06-21 17:05:46,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 83 transitions, 850 flow [2024-06-21 17:05:46,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 802 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:46,181 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 647 flow [2024-06-21 17:05:46,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=647, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-06-21 17:05:46,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-21 17:05:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 647 flow [2024-06-21 17:05:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:46,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:46,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:46,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:05:46,183 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:46,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1205821353, now seen corresponding path program 1 times [2024-06-21 17:05:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:46,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119118312] [2024-06-21 17:05:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:46,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:46,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119118312] [2024-06-21 17:05:46,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119118312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:46,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:46,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364940754] [2024-06-21 17:05:46,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:46,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:46,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:46,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:46,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:46,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 647 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:46,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:46,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:46,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:46,817 INFO L124 PetriNetUnfolderBase]: 243/435 cut-off events. [2024-06-21 17:05:46,817 INFO L125 PetriNetUnfolderBase]: For 5886/5890 co-relation queries the response was YES. [2024-06-21 17:05:46,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2333 conditions, 435 events. 243/435 cut-off events. For 5886/5890 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1586 event pairs, 53 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 2293. Up to 376 conditions per place. [2024-06-21 17:05:46,822 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2024-06-21 17:05:46,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 83 transitions, 879 flow [2024-06-21 17:05:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 17:05:46,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 17:05:46,824 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 647 flow. Second operand 8 states and 86 transitions. [2024-06-21 17:05:46,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 83 transitions, 879 flow [2024-06-21 17:05:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 83 transitions, 797 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:46,830 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 632 flow [2024-06-21 17:05:46,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=632, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-06-21 17:05:46,831 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-21 17:05:46,831 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 632 flow [2024-06-21 17:05:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:46,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:46,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:05:46,832 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:46,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1987658813, now seen corresponding path program 2 times [2024-06-21 17:05:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500826941] [2024-06-21 17:05:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:47,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:47,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500826941] [2024-06-21 17:05:47,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500826941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:47,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:47,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:05:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18371087] [2024-06-21 17:05:47,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:47,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:05:47,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:05:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:05:47,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:47,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 632 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:47,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:47,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:47,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:47,386 INFO L124 PetriNetUnfolderBase]: 241/432 cut-off events. [2024-06-21 17:05:47,387 INFO L125 PetriNetUnfolderBase]: For 6164/6168 co-relation queries the response was YES. [2024-06-21 17:05:47,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2304 conditions, 432 events. 241/432 cut-off events. For 6164/6168 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1580 event pairs, 53 based on Foata normal form. 5/436 useless extension candidates. Maximal degree in co-relation 2263. Up to 374 conditions per place. [2024-06-21 17:05:47,390 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 22 changer transitions 0/81 dead transitions. [2024-06-21 17:05:47,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 81 transitions, 808 flow [2024-06-21 17:05:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 17:05:47,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:05:47,391 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 632 flow. Second operand 7 states and 77 transitions. [2024-06-21 17:05:47,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 81 transitions, 808 flow [2024-06-21 17:05:47,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 754 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:47,400 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 627 flow [2024-06-21 17:05:47,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2024-06-21 17:05:47,400 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 17:05:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 627 flow [2024-06-21 17:05:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:47,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:47,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:05:47,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:47,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1987381983, now seen corresponding path program 1 times [2024-06-21 17:05:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:47,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82356020] [2024-06-21 17:05:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:48,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:48,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82356020] [2024-06-21 17:05:48,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82356020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:48,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:48,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:48,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118012990] [2024-06-21 17:05:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:48,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:48,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:48,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:48,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:48,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 627 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:48,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:48,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:48,246 INFO L124 PetriNetUnfolderBase]: 242/434 cut-off events. [2024-06-21 17:05:48,247 INFO L125 PetriNetUnfolderBase]: For 6776/6780 co-relation queries the response was YES. [2024-06-21 17:05:48,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 434 events. 242/434 cut-off events. For 6776/6780 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1579 event pairs, 51 based on Foata normal form. 6/439 useless extension candidates. Maximal degree in co-relation 2275. Up to 356 conditions per place. [2024-06-21 17:05:48,250 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 55 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2024-06-21 17:05:48,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 87 transitions, 883 flow [2024-06-21 17:05:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 17:05:48,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 17:05:48,253 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 627 flow. Second operand 9 states and 97 transitions. [2024-06-21 17:05:48,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 87 transitions, 883 flow [2024-06-21 17:05:48,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 87 transitions, 827 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:48,261 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 667 flow [2024-06-21 17:05:48,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=667, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-21 17:05:48,262 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-21 17:05:48,262 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 667 flow [2024-06-21 17:05:48,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:48,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:48,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:05:48,263 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:48,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1999489361, now seen corresponding path program 1 times [2024-06-21 17:05:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:48,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546552311] [2024-06-21 17:05:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:48,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:48,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:48,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546552311] [2024-06-21 17:05:48,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546552311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:48,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:48,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:48,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720120399] [2024-06-21 17:05:48,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:48,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:48,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:48,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:48,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 667 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:48,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:48,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:48,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:49,154 INFO L124 PetriNetUnfolderBase]: 246/441 cut-off events. [2024-06-21 17:05:49,155 INFO L125 PetriNetUnfolderBase]: For 7289/7289 co-relation queries the response was YES. [2024-06-21 17:05:49,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 441 events. 246/441 cut-off events. For 7289/7289 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1613 event pairs, 27 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 2395. Up to 374 conditions per place. [2024-06-21 17:05:49,158 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 78 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-06-21 17:05:49,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 93 transitions, 901 flow [2024-06-21 17:05:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 17:05:49,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274193548387094 [2024-06-21 17:05:49,159 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 667 flow. Second operand 8 states and 85 transitions. [2024-06-21 17:05:49,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 93 transitions, 901 flow [2024-06-21 17:05:49,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 827 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:49,166 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 637 flow [2024-06-21 17:05:49,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=637, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2024-06-21 17:05:49,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-21 17:05:49,167 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 637 flow [2024-06-21 17:05:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:49,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:49,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:05:49,167 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:49,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash -258752179, now seen corresponding path program 2 times [2024-06-21 17:05:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079798988] [2024-06-21 17:05:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:49,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:49,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079798988] [2024-06-21 17:05:49,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079798988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:49,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:49,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:49,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491557908] [2024-06-21 17:05:49,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:49,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:49,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:49,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:49,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:49,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 637 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:49,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:49,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:50,081 INFO L124 PetriNetUnfolderBase]: 250/449 cut-off events. [2024-06-21 17:05:50,081 INFO L125 PetriNetUnfolderBase]: For 8029/8029 co-relation queries the response was YES. [2024-06-21 17:05:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 449 events. 250/449 cut-off events. For 8029/8029 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1664 event pairs, 45 based on Foata normal form. 2/450 useless extension candidates. Maximal degree in co-relation 2426. Up to 391 conditions per place. [2024-06-21 17:05:50,084 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 76 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 17:05:50,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 94 transitions, 877 flow [2024-06-21 17:05:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:05:50,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 17:05:50,085 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 637 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:05:50,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 94 transitions, 877 flow [2024-06-21 17:05:50,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 94 transitions, 843 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:50,094 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 656 flow [2024-06-21 17:05:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=656, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2024-06-21 17:05:50,094 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-21 17:05:50,094 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 656 flow [2024-06-21 17:05:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:50,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:05:50,095 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:50,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash -256070865, now seen corresponding path program 1 times [2024-06-21 17:05:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357169618] [2024-06-21 17:05:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:50,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357169618] [2024-06-21 17:05:50,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357169618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:50,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:50,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:50,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846985339] [2024-06-21 17:05:50,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:50,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:50,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:50,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 transitions, 656 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:50,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:50,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:50,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:50,983 INFO L124 PetriNetUnfolderBase]: 248/447 cut-off events. [2024-06-21 17:05:50,983 INFO L125 PetriNetUnfolderBase]: For 8487/8491 co-relation queries the response was YES. [2024-06-21 17:05:50,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468 conditions, 447 events. 248/447 cut-off events. For 8487/8491 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1673 event pairs, 47 based on Foata normal form. 5/451 useless extension candidates. Maximal degree in co-relation 2423. Up to 385 conditions per place. [2024-06-21 17:05:50,987 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 71 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-21 17:05:50,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 870 flow [2024-06-21 17:05:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:05:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:05:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 17:05:50,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 17:05:50,988 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 656 flow. Second operand 7 states and 78 transitions. [2024-06-21 17:05:50,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 870 flow [2024-06-21 17:05:50,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 825 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:50,996 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 655 flow [2024-06-21 17:05:50,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=655, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2024-06-21 17:05:50,997 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-21 17:05:50,997 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 655 flow [2024-06-21 17:05:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:50,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:50,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:50,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:05:50,998 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:50,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1400521525, now seen corresponding path program 1 times [2024-06-21 17:05:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:50,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316671039] [2024-06-21 17:05:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:50,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:51,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316671039] [2024-06-21 17:05:51,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316671039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:51,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:51,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168878909] [2024-06-21 17:05:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:51,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:51,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:51,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:51,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:51,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 655 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:51,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:51,617 INFO L124 PetriNetUnfolderBase]: 254/458 cut-off events. [2024-06-21 17:05:51,617 INFO L125 PetriNetUnfolderBase]: For 9351/9355 co-relation queries the response was YES. [2024-06-21 17:05:51,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2521 conditions, 458 events. 254/458 cut-off events. For 9351/9355 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1732 event pairs, 50 based on Foata normal form. 6/463 useless extension candidates. Maximal degree in co-relation 2475. Up to 393 conditions per place. [2024-06-21 17:05:51,620 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 76 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-21 17:05:51,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 95 transitions, 897 flow [2024-06-21 17:05:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:05:51,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 17:05:51,621 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 655 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:05:51,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 95 transitions, 897 flow [2024-06-21 17:05:51,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 95 transitions, 829 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:51,631 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 644 flow [2024-06-21 17:05:51,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-06-21 17:05:51,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-21 17:05:51,631 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 644 flow [2024-06-21 17:05:51,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:51,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:51,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:51,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:05:51,632 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:51,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:51,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1024660835, now seen corresponding path program 2 times [2024-06-21 17:05:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:51,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865076957] [2024-06-21 17:05:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:52,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:52,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865076957] [2024-06-21 17:05:52,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865076957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:52,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:52,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:52,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476084413] [2024-06-21 17:05:52,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:52,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:52,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:52,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:52,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:52,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:52,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 644 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:52,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:52,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:52,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:52,345 INFO L124 PetriNetUnfolderBase]: 270/484 cut-off events. [2024-06-21 17:05:52,345 INFO L125 PetriNetUnfolderBase]: For 9918/9918 co-relation queries the response was YES. [2024-06-21 17:05:52,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 484 events. 270/484 cut-off events. For 9918/9918 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1841 event pairs, 52 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 2631. Up to 300 conditions per place. [2024-06-21 17:05:52,350 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 56 selfloop transitions, 43 changer transitions 0/101 dead transitions. [2024-06-21 17:05:52,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 1028 flow [2024-06-21 17:05:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 17:05:52,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 17:05:52,351 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 644 flow. Second operand 8 states and 96 transitions. [2024-06-21 17:05:52,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 1028 flow [2024-06-21 17:05:52,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 101 transitions, 987 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:52,365 INFO L231 Difference]: Finished difference. Result has 97 places, 87 transitions, 752 flow [2024-06-21 17:05:52,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=752, PETRI_PLACES=97, PETRI_TRANSITIONS=87} [2024-06-21 17:05:52,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-21 17:05:52,366 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 87 transitions, 752 flow [2024-06-21 17:05:52,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:52,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:52,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:05:52,367 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:52,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1024845285, now seen corresponding path program 3 times [2024-06-21 17:05:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247386542] [2024-06-21 17:05:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:53,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:53,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247386542] [2024-06-21 17:05:53,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247386542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:53,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:53,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:53,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183533839] [2024-06-21 17:05:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:53,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:53,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:53,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 87 transitions, 752 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:53,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:53,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:53,346 INFO L124 PetriNetUnfolderBase]: 274/490 cut-off events. [2024-06-21 17:05:53,346 INFO L125 PetriNetUnfolderBase]: For 10843/10843 co-relation queries the response was YES. [2024-06-21 17:05:53,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 490 events. 274/490 cut-off events. For 10843/10843 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1874 event pairs, 44 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2792. Up to 420 conditions per place. [2024-06-21 17:05:53,350 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 80 selfloop transitions, 20 changer transitions 0/102 dead transitions. [2024-06-21 17:05:53,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 102 transitions, 1008 flow [2024-06-21 17:05:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:05:53,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 17:05:53,352 INFO L175 Difference]: Start difference. First operand has 97 places, 87 transitions, 752 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:05:53,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 102 transitions, 1008 flow [2024-06-21 17:05:53,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 102 transitions, 963 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 17:05:53,363 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 769 flow [2024-06-21 17:05:53,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=769, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2024-06-21 17:05:53,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-21 17:05:53,364 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 769 flow [2024-06-21 17:05:53,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:53,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:53,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:53,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:05:53,364 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:53,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -845267487, now seen corresponding path program 3 times [2024-06-21 17:05:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620812582] [2024-06-21 17:05:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620812582] [2024-06-21 17:05:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620812582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:53,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:53,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:53,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531640759] [2024-06-21 17:05:53,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:53,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:53,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:53,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:53,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:53,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:53,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:53,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:54,037 INFO L124 PetriNetUnfolderBase]: 280/502 cut-off events. [2024-06-21 17:05:54,037 INFO L125 PetriNetUnfolderBase]: For 11820/11820 co-relation queries the response was YES. [2024-06-21 17:05:54,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 502 events. 280/502 cut-off events. For 11820/11820 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1959 event pairs, 49 based on Foata normal form. 2/503 useless extension candidates. Maximal degree in co-relation 2880. Up to 314 conditions per place. [2024-06-21 17:05:54,049 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 42 changer transitions 0/104 dead transitions. [2024-06-21 17:05:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 104 transitions, 1131 flow [2024-06-21 17:05:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 17:05:54,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 17:05:54,052 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 769 flow. Second operand 8 states and 96 transitions. [2024-06-21 17:05:54,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 104 transitions, 1131 flow [2024-06-21 17:05:54,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 104 transitions, 1079 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:05:54,066 INFO L231 Difference]: Finished difference. Result has 104 places, 90 transitions, 824 flow [2024-06-21 17:05:54,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=104, PETRI_TRANSITIONS=90} [2024-06-21 17:05:54,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 17:05:54,071 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 90 transitions, 824 flow [2024-06-21 17:05:54,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:54,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:54,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:54,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:05:54,071 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:54,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash -428734409, now seen corresponding path program 4 times [2024-06-21 17:05:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:54,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005579486] [2024-06-21 17:05:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:54,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005579486] [2024-06-21 17:05:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005579486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:54,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:54,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:54,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990446310] [2024-06-21 17:05:54,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:54,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:54,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:54,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:54,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:54,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 90 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:54,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:54,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:54,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:54,732 INFO L124 PetriNetUnfolderBase]: 281/504 cut-off events. [2024-06-21 17:05:54,733 INFO L125 PetriNetUnfolderBase]: For 12340/12340 co-relation queries the response was YES. [2024-06-21 17:05:54,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 504 events. 281/504 cut-off events. For 12340/12340 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1955 event pairs, 57 based on Foata normal form. 2/505 useless extension candidates. Maximal degree in co-relation 2946. Up to 317 conditions per place. [2024-06-21 17:05:54,736 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 41 changer transitions 0/106 dead transitions. [2024-06-21 17:05:54,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 1198 flow [2024-06-21 17:05:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 17:05:54,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 17:05:54,738 INFO L175 Difference]: Start difference. First operand has 104 places, 90 transitions, 824 flow. Second operand 8 states and 94 transitions. [2024-06-21 17:05:54,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 1198 flow [2024-06-21 17:05:54,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 1125 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:54,754 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 860 flow [2024-06-21 17:05:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2024-06-21 17:05:54,757 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 17:05:54,757 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 860 flow [2024-06-21 17:05:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:54,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:54,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:05:54,757 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:54,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1274541679, now seen corresponding path program 1 times [2024-06-21 17:05:54,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:54,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001715683] [2024-06-21 17:05:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:55,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001715683] [2024-06-21 17:05:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001715683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:55,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:55,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850808941] [2024-06-21 17:05:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:55,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:55,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 860 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:55,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:55,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:55,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:55,524 INFO L124 PetriNetUnfolderBase]: 284/508 cut-off events. [2024-06-21 17:05:55,525 INFO L125 PetriNetUnfolderBase]: For 12884/12888 co-relation queries the response was YES. [2024-06-21 17:05:55,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 508 events. 284/508 cut-off events. For 12884/12888 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1975 event pairs, 54 based on Foata normal form. 5/512 useless extension candidates. Maximal degree in co-relation 3008. Up to 435 conditions per place. [2024-06-21 17:05:55,528 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 73 selfloop transitions, 29 changer transitions 0/104 dead transitions. [2024-06-21 17:05:55,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 104 transitions, 1156 flow [2024-06-21 17:05:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 17:05:55,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 17:05:55,529 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 860 flow. Second operand 9 states and 96 transitions. [2024-06-21 17:05:55,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 104 transitions, 1156 flow [2024-06-21 17:05:55,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 104 transitions, 1106 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:05:55,543 INFO L231 Difference]: Finished difference. Result has 112 places, 94 transitions, 887 flow [2024-06-21 17:05:55,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=887, PETRI_PLACES=112, PETRI_TRANSITIONS=94} [2024-06-21 17:05:55,544 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 17:05:55,544 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 94 transitions, 887 flow [2024-06-21 17:05:55,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:55,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:55,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:55,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:05:55,544 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:55,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1274244761, now seen corresponding path program 5 times [2024-06-21 17:05:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:55,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935137036] [2024-06-21 17:05:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:55,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935137036] [2024-06-21 17:05:56,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935137036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:56,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:56,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996850427] [2024-06-21 17:05:56,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:56,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:56,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 94 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:56,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:56,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:56,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:56,344 INFO L124 PetriNetUnfolderBase]: 290/519 cut-off events. [2024-06-21 17:05:56,345 INFO L125 PetriNetUnfolderBase]: For 14213/14213 co-relation queries the response was YES. [2024-06-21 17:05:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 519 events. 290/519 cut-off events. For 14213/14213 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2031 event pairs, 54 based on Foata normal form. 2/520 useless extension candidates. Maximal degree in co-relation 3056. Up to 328 conditions per place. [2024-06-21 17:05:56,348 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 49 changer transitions 0/111 dead transitions. [2024-06-21 17:05:56,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 111 transitions, 1281 flow [2024-06-21 17:05:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 17:05:56,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 17:05:56,349 INFO L175 Difference]: Start difference. First operand has 112 places, 94 transitions, 887 flow. Second operand 9 states and 104 transitions. [2024-06-21 17:05:56,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 111 transitions, 1281 flow [2024-06-21 17:05:56,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 111 transitions, 1217 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:56,366 INFO L231 Difference]: Finished difference. Result has 114 places, 96 transitions, 948 flow [2024-06-21 17:05:56,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=114, PETRI_TRANSITIONS=96} [2024-06-21 17:05:56,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-21 17:05:56,367 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 96 transitions, 948 flow [2024-06-21 17:05:56,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:56,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:56,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:56,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:05:56,368 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:56,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1037884951, now seen corresponding path program 4 times [2024-06-21 17:05:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:56,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918433137] [2024-06-21 17:05:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:56,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918433137] [2024-06-21 17:05:56,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918433137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:56,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:56,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:56,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023843180] [2024-06-21 17:05:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:56,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:56,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:56,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:56,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 96 transitions, 948 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:56,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:56,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:56,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:57,106 INFO L124 PetriNetUnfolderBase]: 291/522 cut-off events. [2024-06-21 17:05:57,106 INFO L125 PetriNetUnfolderBase]: For 15325/15325 co-relation queries the response was YES. [2024-06-21 17:05:57,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 522 events. 291/522 cut-off events. For 15325/15325 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2057 event pairs, 55 based on Foata normal form. 4/525 useless extension candidates. Maximal degree in co-relation 3091. Up to 384 conditions per place. [2024-06-21 17:05:57,109 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 76 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-06-21 17:05:57,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 108 transitions, 1196 flow [2024-06-21 17:05:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 17:05:57,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 17:05:57,110 INFO L175 Difference]: Start difference. First operand has 114 places, 96 transitions, 948 flow. Second operand 8 states and 90 transitions. [2024-06-21 17:05:57,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 108 transitions, 1196 flow [2024-06-21 17:05:57,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 108 transitions, 1085 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:57,127 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 910 flow [2024-06-21 17:05:57,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-06-21 17:05:57,127 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-21 17:05:57,127 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 910 flow [2024-06-21 17:05:57,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:57,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:57,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:57,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:05:57,128 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:57,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1265964041, now seen corresponding path program 6 times [2024-06-21 17:05:57,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:57,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839503325] [2024-06-21 17:05:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:57,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:57,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839503325] [2024-06-21 17:05:57,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839503325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:57,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:57,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:57,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659509627] [2024-06-21 17:05:57,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:57,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:57,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:57,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:57,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:57,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:57,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:57,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:57,776 INFO L124 PetriNetUnfolderBase]: 297/532 cut-off events. [2024-06-21 17:05:57,776 INFO L125 PetriNetUnfolderBase]: For 15295/15295 co-relation queries the response was YES. [2024-06-21 17:05:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3164 conditions, 532 events. 297/532 cut-off events. For 15295/15295 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2111 event pairs, 61 based on Foata normal form. 2/533 useless extension candidates. Maximal degree in co-relation 3109. Up to 337 conditions per place. [2024-06-21 17:05:57,779 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 44 changer transitions 0/112 dead transitions. [2024-06-21 17:05:57,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 112 transitions, 1308 flow [2024-06-21 17:05:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 17:05:57,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 17:05:57,780 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 910 flow. Second operand 8 states and 95 transitions. [2024-06-21 17:05:57,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 112 transitions, 1308 flow [2024-06-21 17:05:57,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 112 transitions, 1219 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:57,797 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 936 flow [2024-06-21 17:05:57,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2024-06-21 17:05:57,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 17:05:57,798 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 936 flow [2024-06-21 17:05:57,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:57,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:57,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:57,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:05:57,799 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:57,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1265970551, now seen corresponding path program 7 times [2024-06-21 17:05:57,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:57,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246202264] [2024-06-21 17:05:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:57,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:58,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:58,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246202264] [2024-06-21 17:05:58,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246202264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:58,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:58,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68200857] [2024-06-21 17:05:58,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:58,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:58,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:58,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:58,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:58,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 936 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:58,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:58,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:58,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:58,414 INFO L124 PetriNetUnfolderBase]: 293/526 cut-off events. [2024-06-21 17:05:58,414 INFO L125 PetriNetUnfolderBase]: For 15213/15213 co-relation queries the response was YES. [2024-06-21 17:05:58,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3094 conditions, 526 events. 293/526 cut-off events. For 15213/15213 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2087 event pairs, 60 based on Foata normal form. 2/527 useless extension candidates. Maximal degree in co-relation 3039. Up to 334 conditions per place. [2024-06-21 17:05:58,417 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 43 changer transitions 0/112 dead transitions. [2024-06-21 17:05:58,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 112 transitions, 1256 flow [2024-06-21 17:05:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 17:05:58,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 17:05:58,419 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 936 flow. Second operand 8 states and 95 transitions. [2024-06-21 17:05:58,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 112 transitions, 1256 flow [2024-06-21 17:05:58,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 1124 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:05:58,435 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 895 flow [2024-06-21 17:05:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=895, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2024-06-21 17:05:58,436 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-06-21 17:05:58,436 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 895 flow [2024-06-21 17:05:58,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:58,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:58,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:58,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:05:58,437 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:58,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1265970799, now seen corresponding path program 2 times [2024-06-21 17:05:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:58,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530294011] [2024-06-21 17:05:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530294011] [2024-06-21 17:05:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530294011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:58,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:05:58,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957274823] [2024-06-21 17:05:58,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:58,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:05:58,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:05:58,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:05:58,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:58,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 895 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:58,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:58,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:59,066 INFO L124 PetriNetUnfolderBase]: 296/530 cut-off events. [2024-06-21 17:05:59,066 INFO L125 PetriNetUnfolderBase]: For 15393/15397 co-relation queries the response was YES. [2024-06-21 17:05:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3073 conditions, 530 events. 296/530 cut-off events. For 15393/15397 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2102 event pairs, 54 based on Foata normal form. 5/534 useless extension candidates. Maximal degree in co-relation 3018. Up to 456 conditions per place. [2024-06-21 17:05:59,069 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 79 selfloop transitions, 29 changer transitions 0/110 dead transitions. [2024-06-21 17:05:59,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 110 transitions, 1211 flow [2024-06-21 17:05:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:05:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:05:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 17:05:59,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:05:59,070 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 895 flow. Second operand 8 states and 88 transitions. [2024-06-21 17:05:59,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 110 transitions, 1211 flow [2024-06-21 17:05:59,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 110 transitions, 1093 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:05:59,089 INFO L231 Difference]: Finished difference. Result has 117 places, 101 transitions, 854 flow [2024-06-21 17:05:59,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=854, PETRI_PLACES=117, PETRI_TRANSITIONS=101} [2024-06-21 17:05:59,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-06-21 17:05:59,089 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 101 transitions, 854 flow [2024-06-21 17:05:59,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:59,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:59,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:59,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:05:59,090 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:59,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1274245009, now seen corresponding path program 3 times [2024-06-21 17:05:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943444662] [2024-06-21 17:05:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:59,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:05:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:05:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:05:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943444662] [2024-06-21 17:05:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943444662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:05:59,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:05:59,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:05:59,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54274106] [2024-06-21 17:05:59,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:05:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:05:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:05:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:05:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:05:59,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:05:59,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 101 transitions, 854 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:59,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:05:59,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:05:59,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:05:59,888 INFO L124 PetriNetUnfolderBase]: 294/527 cut-off events. [2024-06-21 17:05:59,888 INFO L125 PetriNetUnfolderBase]: For 15490/15494 co-relation queries the response was YES. [2024-06-21 17:05:59,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2994 conditions, 527 events. 294/527 cut-off events. For 15490/15494 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2089 event pairs, 54 based on Foata normal form. 5/531 useless extension candidates. Maximal degree in co-relation 2938. Up to 454 conditions per place. [2024-06-21 17:05:59,891 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 31 changer transitions 0/110 dead transitions. [2024-06-21 17:05:59,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 110 transitions, 1092 flow [2024-06-21 17:05:59,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:05:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:05:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 17:05:59,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 17:05:59,896 INFO L175 Difference]: Start difference. First operand has 117 places, 101 transitions, 854 flow. Second operand 9 states and 96 transitions. [2024-06-21 17:05:59,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 110 transitions, 1092 flow [2024-06-21 17:05:59,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 110 transitions, 1041 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:05:59,914 INFO L231 Difference]: Finished difference. Result has 121 places, 101 transitions, 870 flow [2024-06-21 17:05:59,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=870, PETRI_PLACES=121, PETRI_TRANSITIONS=101} [2024-06-21 17:05:59,915 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-21 17:05:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 101 transitions, 870 flow [2024-06-21 17:05:59,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:05:59,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:05:59,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:05:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:05:59,916 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:05:59,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:05:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1479297979, now seen corresponding path program 1 times [2024-06-21 17:05:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:05:59,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687411311] [2024-06-21 17:05:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:05:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:05:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:00,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687411311] [2024-06-21 17:06:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687411311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:00,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:00,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:00,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835908605] [2024-06-21 17:06:00,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:00,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:00,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:00,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 101 transitions, 870 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:00,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:00,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:00,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:00,805 INFO L124 PetriNetUnfolderBase]: 295/530 cut-off events. [2024-06-21 17:06:00,805 INFO L125 PetriNetUnfolderBase]: For 17045/17049 co-relation queries the response was YES. [2024-06-21 17:06:00,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 530 events. 295/530 cut-off events. For 17045/17049 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2103 event pairs, 54 based on Foata normal form. 8/537 useless extension candidates. Maximal degree in co-relation 2922. Up to 439 conditions per place. [2024-06-21 17:06:00,808 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 36 changer transitions 0/113 dead transitions. [2024-06-21 17:06:00,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 113 transitions, 1130 flow [2024-06-21 17:06:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 17:06:00,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 17:06:00,808 INFO L175 Difference]: Start difference. First operand has 121 places, 101 transitions, 870 flow. Second operand 10 states and 104 transitions. [2024-06-21 17:06:00,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 113 transitions, 1130 flow [2024-06-21 17:06:00,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 113 transitions, 1037 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:00,824 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 868 flow [2024-06-21 17:06:00,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=868, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-06-21 17:06:00,825 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 17:06:00,825 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 868 flow [2024-06-21 17:06:00,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:00,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:00,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:00,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:06:00,825 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:00,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:00,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1854626821, now seen corresponding path program 1 times [2024-06-21 17:06:00,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:00,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245572712] [2024-06-21 17:06:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:00,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:01,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245572712] [2024-06-21 17:06:01,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245572712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:01,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:01,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:01,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301364130] [2024-06-21 17:06:01,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:01,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:01,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:01,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:01,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 868 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:01,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:01,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:01,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:01,635 INFO L124 PetriNetUnfolderBase]: 299/538 cut-off events. [2024-06-21 17:06:01,635 INFO L125 PetriNetUnfolderBase]: For 16790/16794 co-relation queries the response was YES. [2024-06-21 17:06:01,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3047 conditions, 538 events. 299/538 cut-off events. For 16790/16794 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2169 event pairs, 33 based on Foata normal form. 6/543 useless extension candidates. Maximal degree in co-relation 2989. Up to 462 conditions per place. [2024-06-21 17:06:01,638 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 102 selfloop transitions, 13 changer transitions 0/117 dead transitions. [2024-06-21 17:06:01,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 117 transitions, 1142 flow [2024-06-21 17:06:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 17:06:01,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346774193548387 [2024-06-21 17:06:01,640 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 868 flow. Second operand 8 states and 83 transitions. [2024-06-21 17:06:01,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 117 transitions, 1142 flow [2024-06-21 17:06:01,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 117 transitions, 1051 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:01,659 INFO L231 Difference]: Finished difference. Result has 122 places, 103 transitions, 817 flow [2024-06-21 17:06:01,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=817, PETRI_PLACES=122, PETRI_TRANSITIONS=103} [2024-06-21 17:06:01,659 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 17:06:01,660 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 103 transitions, 817 flow [2024-06-21 17:06:01,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:01,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:01,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:01,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:06:01,660 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:01,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1665866014, now seen corresponding path program 1 times [2024-06-21 17:06:01,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:01,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128674421] [2024-06-21 17:06:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:02,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:02,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128674421] [2024-06-21 17:06:02,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128674421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:02,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:02,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:02,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137562574] [2024-06-21 17:06:02,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:02,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:02,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:02,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:02,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:02,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 103 transitions, 817 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:02,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:02,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:02,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:02,464 INFO L124 PetriNetUnfolderBase]: 297/535 cut-off events. [2024-06-21 17:06:02,464 INFO L125 PetriNetUnfolderBase]: For 16232/16236 co-relation queries the response was YES. [2024-06-21 17:06:02,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2942 conditions, 535 events. 297/535 cut-off events. For 16232/16236 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2153 event pairs, 47 based on Foata normal form. 5/539 useless extension candidates. Maximal degree in co-relation 2883. Up to 462 conditions per place. [2024-06-21 17:06:02,466 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 93 selfloop transitions, 22 changer transitions 0/117 dead transitions. [2024-06-21 17:06:02,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 117 transitions, 1089 flow [2024-06-21 17:06:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:06:02,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 17:06:02,477 INFO L175 Difference]: Start difference. First operand has 122 places, 103 transitions, 817 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:06:02,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 117 transitions, 1089 flow [2024-06-21 17:06:02,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 117 transitions, 1055 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:02,501 INFO L231 Difference]: Finished difference. Result has 124 places, 103 transitions, 835 flow [2024-06-21 17:06:02,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=835, PETRI_PLACES=124, PETRI_TRANSITIONS=103} [2024-06-21 17:06:02,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-21 17:06:02,501 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 103 transitions, 835 flow [2024-06-21 17:06:02,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:02,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:02,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:02,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:06:02,502 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)] === [2024-06-21 17:06:02,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash -553334939, now seen corresponding path program 2 times [2024-06-21 17:06:02,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:02,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384776188] [2024-06-21 17:06:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:03,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:03,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384776188] [2024-06-21 17:06:03,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384776188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:03,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:03,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:03,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353691697] [2024-06-21 17:06:03,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:03,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:03,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:03,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 103 transitions, 835 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:03,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:03,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:03,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:03,329 INFO L124 PetriNetUnfolderBase]: 301/543 cut-off events. [2024-06-21 17:06:03,329 INFO L125 PetriNetUnfolderBase]: For 17782/17786 co-relation queries the response was YES. [2024-06-21 17:06:03,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3014 conditions, 543 events. 301/543 cut-off events. For 17782/17786 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2191 event pairs, 49 based on Foata normal form. 6/548 useless extension candidates. Maximal degree in co-relation 2954. Up to 473 conditions per place. [2024-06-21 17:06:03,332 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 97 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-06-21 17:06:03,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 118 transitions, 1117 flow [2024-06-21 17:06:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 17:06:03,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 17:06:03,341 INFO L175 Difference]: Start difference. First operand has 124 places, 103 transitions, 835 flow. Second operand 8 states and 86 transitions. [2024-06-21 17:06:03,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 118 transitions, 1117 flow [2024-06-21 17:06:03,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 118 transitions, 1016 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:03,363 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 789 flow [2024-06-21 17:06:03,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=789, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2024-06-21 17:06:03,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-21 17:06:03,364 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 789 flow [2024-06-21 17:06:03,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:03,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:03,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:03,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:06:03,366 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)] === [2024-06-21 17:06:03,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash -553338659, now seen corresponding path program 3 times [2024-06-21 17:06:03,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:03,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54580738] [2024-06-21 17:06:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:03,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:03,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:03,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54580738] [2024-06-21 17:06:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54580738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:03,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:03,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:03,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350020128] [2024-06-21 17:06:03,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:03,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:03,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:03,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:03,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:04,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:04,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 789 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:04,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:04,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:04,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:04,210 INFO L124 PetriNetUnfolderBase]: 305/551 cut-off events. [2024-06-21 17:06:04,211 INFO L125 PetriNetUnfolderBase]: For 18738/18742 co-relation queries the response was YES. [2024-06-21 17:06:04,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3032 conditions, 551 events. 305/551 cut-off events. For 18738/18742 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2254 event pairs, 49 based on Foata normal form. 6/556 useless extension candidates. Maximal degree in co-relation 2971. Up to 465 conditions per place. [2024-06-21 17:06:04,213 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 98 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2024-06-21 17:06:04,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 119 transitions, 1073 flow [2024-06-21 17:06:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:06:04,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-21 17:06:04,214 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 789 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:06:04,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 119 transitions, 1073 flow [2024-06-21 17:06:04,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 119 transitions, 1030 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:04,239 INFO L231 Difference]: Finished difference. Result has 125 places, 105 transitions, 802 flow [2024-06-21 17:06:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=802, PETRI_PLACES=125, PETRI_TRANSITIONS=105} [2024-06-21 17:06:04,239 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-21 17:06:04,239 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 105 transitions, 802 flow [2024-06-21 17:06:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:04,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:06:04,240 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)] === [2024-06-21 17:06:04,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash -466493027, now seen corresponding path program 1 times [2024-06-21 17:06:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:04,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715510598] [2024-06-21 17:06:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:04,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:04,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:04,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715510598] [2024-06-21 17:06:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715510598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:04,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:04,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:04,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016256283] [2024-06-21 17:06:04,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:04,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:04,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:04,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:04,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 105 transitions, 802 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:04,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:04,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:04,890 INFO L124 PetriNetUnfolderBase]: 311/562 cut-off events. [2024-06-21 17:06:04,890 INFO L125 PetriNetUnfolderBase]: For 19674/19678 co-relation queries the response was YES. [2024-06-21 17:06:04,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3093 conditions, 562 events. 311/562 cut-off events. For 19674/19678 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2316 event pairs, 52 based on Foata normal form. 6/567 useless extension candidates. Maximal degree in co-relation 3031. Up to 489 conditions per place. [2024-06-21 17:06:04,893 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 102 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-06-21 17:06:04,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 1108 flow [2024-06-21 17:06:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 17:06:04,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 17:06:04,901 INFO L175 Difference]: Start difference. First operand has 125 places, 105 transitions, 802 flow. Second operand 9 states and 96 transitions. [2024-06-21 17:06:04,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 1108 flow [2024-06-21 17:06:04,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 123 transitions, 1062 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:04,930 INFO L231 Difference]: Finished difference. Result has 128 places, 107 transitions, 819 flow [2024-06-21 17:06:04,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=819, PETRI_PLACES=128, PETRI_TRANSITIONS=107} [2024-06-21 17:06:04,931 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 17:06:04,931 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 107 transitions, 819 flow [2024-06-21 17:06:04,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:04,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:04,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:04,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:06:04,932 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)] === [2024-06-21 17:06:04,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1813690661, now seen corresponding path program 2 times [2024-06-21 17:06:04,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:04,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850572765] [2024-06-21 17:06:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:04,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:05,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:05,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850572765] [2024-06-21 17:06:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850572765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:05,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:05,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:05,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984306514] [2024-06-21 17:06:05,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:05,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:05,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:05,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 107 transitions, 819 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:05,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:05,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:05,630 INFO L124 PetriNetUnfolderBase]: 343/614 cut-off events. [2024-06-21 17:06:05,630 INFO L125 PetriNetUnfolderBase]: For 25502/25502 co-relation queries the response was YES. [2024-06-21 17:06:05,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3498 conditions, 614 events. 343/614 cut-off events. For 25502/25502 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2582 event pairs, 51 based on Foata normal form. 4/617 useless extension candidates. Maximal degree in co-relation 3435. Up to 289 conditions per place. [2024-06-21 17:06:05,634 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 73 selfloop transitions, 58 changer transitions 0/133 dead transitions. [2024-06-21 17:06:05,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 133 transitions, 1373 flow [2024-06-21 17:06:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 17:06:05,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 17:06:05,635 INFO L175 Difference]: Start difference. First operand has 128 places, 107 transitions, 819 flow. Second operand 9 states and 111 transitions. [2024-06-21 17:06:05,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 133 transitions, 1373 flow [2024-06-21 17:06:05,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 1326 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:05,664 INFO L231 Difference]: Finished difference. Result has 130 places, 114 transitions, 961 flow [2024-06-21 17:06:05,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=961, PETRI_PLACES=130, PETRI_TRANSITIONS=114} [2024-06-21 17:06:05,664 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-21 17:06:05,665 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 114 transitions, 961 flow [2024-06-21 17:06:05,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:05,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:05,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:05,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:06:05,665 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)] === [2024-06-21 17:06:05,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:05,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1181869863, now seen corresponding path program 3 times [2024-06-21 17:06:05,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:05,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424597121] [2024-06-21 17:06:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:05,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:06,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:06,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424597121] [2024-06-21 17:06:06,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424597121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:06,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:06,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:06,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423664959] [2024-06-21 17:06:06,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:06,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:06,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:06,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:06,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 114 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:06,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:06,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:06,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:06,326 INFO L124 PetriNetUnfolderBase]: 349/624 cut-off events. [2024-06-21 17:06:06,326 INFO L125 PetriNetUnfolderBase]: For 25026/25026 co-relation queries the response was YES. [2024-06-21 17:06:06,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3722 conditions, 624 events. 349/624 cut-off events. For 25026/25026 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2633 event pairs, 53 based on Foata normal form. 2/625 useless extension candidates. Maximal degree in co-relation 3658. Up to 291 conditions per place. [2024-06-21 17:06:06,330 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 77 selfloop transitions, 56 changer transitions 0/135 dead transitions. [2024-06-21 17:06:06,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 135 transitions, 1491 flow [2024-06-21 17:06:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 17:06:06,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 17:06:06,339 INFO L175 Difference]: Start difference. First operand has 130 places, 114 transitions, 961 flow. Second operand 9 states and 111 transitions. [2024-06-21 17:06:06,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 135 transitions, 1491 flow [2024-06-21 17:06:06,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 135 transitions, 1421 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:06:06,382 INFO L231 Difference]: Finished difference. Result has 135 places, 116 transitions, 1034 flow [2024-06-21 17:06:06,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1034, PETRI_PLACES=135, PETRI_TRANSITIONS=116} [2024-06-21 17:06:06,383 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 17:06:06,383 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 116 transitions, 1034 flow [2024-06-21 17:06:06,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:06,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:06,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:06,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:06:06,384 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)] === [2024-06-21 17:06:06,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1699921287, now seen corresponding path program 4 times [2024-06-21 17:06:06,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:06,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672620055] [2024-06-21 17:06:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672620055] [2024-06-21 17:06:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672620055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:07,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620259178] [2024-06-21 17:06:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:07,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:07,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 116 transitions, 1034 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:07,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:07,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:07,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:07,228 INFO L124 PetriNetUnfolderBase]: 353/632 cut-off events. [2024-06-21 17:06:07,228 INFO L125 PetriNetUnfolderBase]: For 26188/26188 co-relation queries the response was YES. [2024-06-21 17:06:07,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 632 events. 353/632 cut-off events. For 26188/26188 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2681 event pairs, 52 based on Foata normal form. 2/633 useless extension candidates. Maximal degree in co-relation 3815. Up to 500 conditions per place. [2024-06-21 17:06:07,232 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 93 selfloop transitions, 34 changer transitions 0/129 dead transitions. [2024-06-21 17:06:07,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 129 transitions, 1336 flow [2024-06-21 17:06:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:07,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 17:06:07,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 17:06:07,233 INFO L175 Difference]: Start difference. First operand has 135 places, 116 transitions, 1034 flow. Second operand 8 states and 90 transitions. [2024-06-21 17:06:07,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 129 transitions, 1336 flow [2024-06-21 17:06:07,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 129 transitions, 1234 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:07,276 INFO L231 Difference]: Finished difference. Result has 137 places, 117 transitions, 1020 flow [2024-06-21 17:06:07,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=137, PETRI_TRANSITIONS=117} [2024-06-21 17:06:07,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-21 17:06:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 117 transitions, 1020 flow [2024-06-21 17:06:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:07,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:07,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:06:07,278 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)] === [2024-06-21 17:06:07,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1699915335, now seen corresponding path program 4 times [2024-06-21 17:06:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:07,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175576318] [2024-06-21 17:06:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:07,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:07,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175576318] [2024-06-21 17:06:07,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175576318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:07,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:07,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259687493] [2024-06-21 17:06:07,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:07,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:07,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 117 transitions, 1020 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:07,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:07,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:07,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:07,955 INFO L124 PetriNetUnfolderBase]: 359/642 cut-off events. [2024-06-21 17:06:07,955 INFO L125 PetriNetUnfolderBase]: For 27347/27347 co-relation queries the response was YES. [2024-06-21 17:06:07,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3906 conditions, 642 events. 359/642 cut-off events. For 27347/27347 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2732 event pairs, 57 based on Foata normal form. 2/643 useless extension candidates. Maximal degree in co-relation 3839. Up to 301 conditions per place. [2024-06-21 17:06:07,959 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 81 selfloop transitions, 55 changer transitions 0/138 dead transitions. [2024-06-21 17:06:07,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 138 transitions, 1567 flow [2024-06-21 17:06:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 17:06:07,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 17:06:07,961 INFO L175 Difference]: Start difference. First operand has 137 places, 117 transitions, 1020 flow. Second operand 9 states and 111 transitions. [2024-06-21 17:06:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 138 transitions, 1567 flow [2024-06-21 17:06:08,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 138 transitions, 1489 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:08,006 INFO L231 Difference]: Finished difference. Result has 140 places, 119 transitions, 1082 flow [2024-06-21 17:06:08,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1082, PETRI_PLACES=140, PETRI_TRANSITIONS=119} [2024-06-21 17:06:08,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-21 17:06:08,007 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 119 transitions, 1082 flow [2024-06-21 17:06:08,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:08,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:08,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:06:08,007 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:08,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1705427817, now seen corresponding path program 5 times [2024-06-21 17:06:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:08,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249771211] [2024-06-21 17:06:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:08,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:08,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249771211] [2024-06-21 17:06:08,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249771211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:08,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:08,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:08,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707006861] [2024-06-21 17:06:08,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:08,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:08,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 119 transitions, 1082 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:08,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:08,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:08,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:08,920 INFO L124 PetriNetUnfolderBase]: 363/650 cut-off events. [2024-06-21 17:06:08,920 INFO L125 PetriNetUnfolderBase]: For 28636/28636 co-relation queries the response was YES. [2024-06-21 17:06:08,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 650 events. 363/650 cut-off events. For 28636/28636 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2795 event pairs, 56 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 3977. Up to 518 conditions per place. [2024-06-21 17:06:08,924 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 100 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-21 17:06:08,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 132 transitions, 1392 flow [2024-06-21 17:06:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 17:06:08,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 17:06:08,925 INFO L175 Difference]: Start difference. First operand has 140 places, 119 transitions, 1082 flow. Second operand 8 states and 89 transitions. [2024-06-21 17:06:08,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 132 transitions, 1392 flow [2024-06-21 17:06:08,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 132 transitions, 1298 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:08,979 INFO L231 Difference]: Finished difference. Result has 142 places, 120 transitions, 1070 flow [2024-06-21 17:06:08,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1070, PETRI_PLACES=142, PETRI_TRANSITIONS=120} [2024-06-21 17:06:08,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-21 17:06:08,980 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 120 transitions, 1070 flow [2024-06-21 17:06:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:08,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:08,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:06:08,980 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1187434053, now seen corresponding path program 5 times [2024-06-21 17:06:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866779373] [2024-06-21 17:06:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866779373] [2024-06-21 17:06:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866779373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811381392] [2024-06-21 17:06:09,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:09,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:09,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:09,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 120 transitions, 1070 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:09,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:09,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:09,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:09,701 INFO L124 PetriNetUnfolderBase]: 374/668 cut-off events. [2024-06-21 17:06:09,701 INFO L125 PetriNetUnfolderBase]: For 31055/31055 co-relation queries the response was YES. [2024-06-21 17:06:09,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4155 conditions, 668 events. 374/668 cut-off events. For 31055/31055 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2884 event pairs, 65 based on Foata normal form. 2/669 useless extension candidates. Maximal degree in co-relation 4086. Up to 320 conditions per place. [2024-06-21 17:06:09,705 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 59 changer transitions 0/143 dead transitions. [2024-06-21 17:06:09,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 143 transitions, 1664 flow [2024-06-21 17:06:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 17:06:09,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-21 17:06:09,707 INFO L175 Difference]: Start difference. First operand has 142 places, 120 transitions, 1070 flow. Second operand 9 states and 107 transitions. [2024-06-21 17:06:09,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 143 transitions, 1664 flow [2024-06-21 17:06:09,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 143 transitions, 1592 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:09,750 INFO L231 Difference]: Finished difference. Result has 147 places, 126 transitions, 1269 flow [2024-06-21 17:06:09,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1269, PETRI_PLACES=147, PETRI_TRANSITIONS=126} [2024-06-21 17:06:09,750 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 17:06:09,750 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 126 transitions, 1269 flow [2024-06-21 17:06:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:09,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:09,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:09,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:06:09,751 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:09,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:09,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1187587875, now seen corresponding path program 6 times [2024-06-21 17:06:09,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:09,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871728727] [2024-06-21 17:06:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:09,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:10,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871728727] [2024-06-21 17:06:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871728727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:10,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:10,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353906060] [2024-06-21 17:06:10,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:10,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:10,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:10,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 126 transitions, 1269 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:10,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:10,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:10,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:10,590 INFO L124 PetriNetUnfolderBase]: 371/663 cut-off events. [2024-06-21 17:06:10,590 INFO L125 PetriNetUnfolderBase]: For 30427/30427 co-relation queries the response was YES. [2024-06-21 17:06:10,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4304 conditions, 663 events. 371/663 cut-off events. For 30427/30427 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2844 event pairs, 57 based on Foata normal form. 2/664 useless extension candidates. Maximal degree in co-relation 4232. Up to 495 conditions per place. [2024-06-21 17:06:10,594 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 103 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-21 17:06:10,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 138 transitions, 1573 flow [2024-06-21 17:06:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:06:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:06:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 17:06:10,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 17:06:10,595 INFO L175 Difference]: Start difference. First operand has 147 places, 126 transitions, 1269 flow. Second operand 8 states and 89 transitions. [2024-06-21 17:06:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 138 transitions, 1573 flow [2024-06-21 17:06:10,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 138 transitions, 1506 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:10,650 INFO L231 Difference]: Finished difference. Result has 150 places, 126 transitions, 1273 flow [2024-06-21 17:06:10,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=150, PETRI_TRANSITIONS=126} [2024-06-21 17:06:10,650 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 17:06:10,650 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 126 transitions, 1273 flow [2024-06-21 17:06:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:10,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:10,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:10,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:06:10,651 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:10,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:10,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1120159145, now seen corresponding path program 6 times [2024-06-21 17:06:10,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:10,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267029573] [2024-06-21 17:06:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:10,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:11,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:11,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267029573] [2024-06-21 17:06:11,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267029573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:11,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111748043] [2024-06-21 17:06:11,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:11,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:11,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 126 transitions, 1273 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:11,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:11,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:11,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:11,340 INFO L124 PetriNetUnfolderBase]: 377/673 cut-off events. [2024-06-21 17:06:11,340 INFO L125 PetriNetUnfolderBase]: For 31900/31900 co-relation queries the response was YES. [2024-06-21 17:06:11,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 673 events. 377/673 cut-off events. For 31900/31900 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2901 event pairs, 64 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 4274. Up to 317 conditions per place. [2024-06-21 17:06:11,345 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 88 selfloop transitions, 56 changer transitions 0/146 dead transitions. [2024-06-21 17:06:11,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 146 transitions, 1939 flow [2024-06-21 17:06:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 17:06:11,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 17:06:11,346 INFO L175 Difference]: Start difference. First operand has 150 places, 126 transitions, 1273 flow. Second operand 9 states and 113 transitions. [2024-06-21 17:06:11,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 146 transitions, 1939 flow [2024-06-21 17:06:11,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 146 transitions, 1860 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:11,396 INFO L231 Difference]: Finished difference. Result has 153 places, 128 transitions, 1343 flow [2024-06-21 17:06:11,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1343, PETRI_PLACES=153, PETRI_TRANSITIONS=128} [2024-06-21 17:06:11,396 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 17:06:11,396 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 128 transitions, 1343 flow [2024-06-21 17:06:11,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:11,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:11,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:11,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:06:11,397 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:11,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1386392384, now seen corresponding path program 1 times [2024-06-21 17:06:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081473701] [2024-06-21 17:06:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:12,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:12,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081473701] [2024-06-21 17:06:12,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081473701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:12,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:12,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032524897] [2024-06-21 17:06:12,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:12,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:12,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:12,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:12,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:12,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 128 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:12,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:12,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:12,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:12,344 INFO L124 PetriNetUnfolderBase]: 405/718 cut-off events. [2024-06-21 17:06:12,344 INFO L125 PetriNetUnfolderBase]: For 38013/38013 co-relation queries the response was YES. [2024-06-21 17:06:12,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4944 conditions, 718 events. 405/718 cut-off events. For 38013/38013 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3153 event pairs, 52 based on Foata normal form. 1/718 useless extension candidates. Maximal degree in co-relation 4870. Up to 378 conditions per place. [2024-06-21 17:06:12,349 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 80 selfloop transitions, 78 changer transitions 0/160 dead transitions. [2024-06-21 17:06:12,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 160 transitions, 2280 flow [2024-06-21 17:06:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 17:06:12,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 17:06:12,351 INFO L175 Difference]: Start difference. First operand has 153 places, 128 transitions, 1343 flow. Second operand 11 states and 130 transitions. [2024-06-21 17:06:12,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 160 transitions, 2280 flow [2024-06-21 17:06:12,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 2053 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:12,405 INFO L231 Difference]: Finished difference. Result has 157 places, 139 transitions, 1505 flow [2024-06-21 17:06:12,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1505, PETRI_PLACES=157, PETRI_TRANSITIONS=139} [2024-06-21 17:06:12,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-21 17:06:12,406 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 139 transitions, 1505 flow [2024-06-21 17:06:12,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:12,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:12,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:12,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:06:12,406 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:12,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:12,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1386065675, now seen corresponding path program 7 times [2024-06-21 17:06:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:12,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198934862] [2024-06-21 17:06:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:12,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198934862] [2024-06-21 17:06:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198934862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777592291] [2024-06-21 17:06:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:12,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:12,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 139 transitions, 1505 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:12,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:12,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:12,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:13,225 INFO L124 PetriNetUnfolderBase]: 409/726 cut-off events. [2024-06-21 17:06:13,225 INFO L125 PetriNetUnfolderBase]: For 40438/40438 co-relation queries the response was YES. [2024-06-21 17:06:13,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4921 conditions, 726 events. 409/726 cut-off events. For 40438/40438 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3183 event pairs, 57 based on Foata normal form. 4/729 useless extension candidates. Maximal degree in co-relation 4846. Up to 342 conditions per place. [2024-06-21 17:06:13,231 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 84 selfloop transitions, 74 changer transitions 0/160 dead transitions. [2024-06-21 17:06:13,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 160 transitions, 2193 flow [2024-06-21 17:06:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 17:06:13,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 17:06:13,232 INFO L175 Difference]: Start difference. First operand has 157 places, 139 transitions, 1505 flow. Second operand 10 states and 123 transitions. [2024-06-21 17:06:13,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 160 transitions, 2193 flow [2024-06-21 17:06:13,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 160 transitions, 2113 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:06:13,306 INFO L231 Difference]: Finished difference. Result has 163 places, 141 transitions, 1606 flow [2024-06-21 17:06:13,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1606, PETRI_PLACES=163, PETRI_TRANSITIONS=141} [2024-06-21 17:06:13,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 17:06:13,307 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 141 transitions, 1606 flow [2024-06-21 17:06:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:13,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:13,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:13,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:06:13,307 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:13,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1120360955, now seen corresponding path program 8 times [2024-06-21 17:06:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055008699] [2024-06-21 17:06:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:13,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:13,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:13,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055008699] [2024-06-21 17:06:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055008699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:13,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:13,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:13,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651086094] [2024-06-21 17:06:13,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:13,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:13,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:13,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:13,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 141 transitions, 1606 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:13,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:13,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:14,031 INFO L124 PetriNetUnfolderBase]: 450/792 cut-off events. [2024-06-21 17:06:14,031 INFO L125 PetriNetUnfolderBase]: For 49079/49079 co-relation queries the response was YES. [2024-06-21 17:06:14,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 792 events. 450/792 cut-off events. For 49079/49079 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3522 event pairs, 75 based on Foata normal form. 2/793 useless extension candidates. Maximal degree in co-relation 5781. Up to 368 conditions per place. [2024-06-21 17:06:14,036 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 98 selfloop transitions, 68 changer transitions 0/168 dead transitions. [2024-06-21 17:06:14,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 2539 flow [2024-06-21 17:06:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 17:06:14,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 17:06:14,037 INFO L175 Difference]: Start difference. First operand has 163 places, 141 transitions, 1606 flow. Second operand 9 states and 115 transitions. [2024-06-21 17:06:14,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 2539 flow [2024-06-21 17:06:14,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 168 transitions, 2396 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:14,108 INFO L231 Difference]: Finished difference. Result has 166 places, 150 transitions, 1770 flow [2024-06-21 17:06:14,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=166, PETRI_TRANSITIONS=150} [2024-06-21 17:06:14,108 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-21 17:06:14,109 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 150 transitions, 1770 flow [2024-06-21 17:06:14,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:14,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:14,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:14,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:06:14,109 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:14,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1120368674, now seen corresponding path program 2 times [2024-06-21 17:06:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119743867] [2024-06-21 17:06:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119743867] [2024-06-21 17:06:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119743867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:14,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:14,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:14,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592062003] [2024-06-21 17:06:14,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:14,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:14,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:14,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:14,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 150 transitions, 1770 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:14,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:14,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:14,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:14,924 INFO L124 PetriNetUnfolderBase]: 446/787 cut-off events. [2024-06-21 17:06:14,925 INFO L125 PetriNetUnfolderBase]: For 48734/48734 co-relation queries the response was YES. [2024-06-21 17:06:14,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5686 conditions, 787 events. 446/787 cut-off events. For 48734/48734 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3498 event pairs, 70 based on Foata normal form. 3/789 useless extension candidates. Maximal degree in co-relation 5608. Up to 473 conditions per place. [2024-06-21 17:06:14,930 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 101 selfloop transitions, 64 changer transitions 0/167 dead transitions. [2024-06-21 17:06:14,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 167 transitions, 2454 flow [2024-06-21 17:06:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 17:06:14,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 17:06:14,931 INFO L175 Difference]: Start difference. First operand has 166 places, 150 transitions, 1770 flow. Second operand 9 states and 110 transitions. [2024-06-21 17:06:14,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 167 transitions, 2454 flow [2024-06-21 17:06:15,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 167 transitions, 2329 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:06:15,014 INFO L231 Difference]: Finished difference. Result has 171 places, 150 transitions, 1782 flow [2024-06-21 17:06:15,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1782, PETRI_PLACES=171, PETRI_TRANSITIONS=150} [2024-06-21 17:06:15,014 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-21 17:06:15,015 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 150 transitions, 1782 flow [2024-06-21 17:06:15,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:15,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:15,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:15,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:06:15,015 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:15,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:15,015 INFO L85 PathProgramCache]: Analyzing trace with hash 973879773, now seen corresponding path program 9 times [2024-06-21 17:06:15,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:15,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132292066] [2024-06-21 17:06:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:15,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132292066] [2024-06-21 17:06:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132292066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:15,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882271963] [2024-06-21 17:06:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:15,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:15,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 150 transitions, 1782 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:15,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:15,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:15,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:15,700 INFO L124 PetriNetUnfolderBase]: 436/771 cut-off events. [2024-06-21 17:06:15,701 INFO L125 PetriNetUnfolderBase]: For 46630/46630 co-relation queries the response was YES. [2024-06-21 17:06:15,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5388 conditions, 771 events. 436/771 cut-off events. For 46630/46630 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3428 event pairs, 74 based on Foata normal form. 4/774 useless extension candidates. Maximal degree in co-relation 5309. Up to 360 conditions per place. [2024-06-21 17:06:15,706 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 96 selfloop transitions, 68 changer transitions 0/166 dead transitions. [2024-06-21 17:06:15,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 166 transitions, 2364 flow [2024-06-21 17:06:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 17:06:15,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 17:06:15,707 INFO L175 Difference]: Start difference. First operand has 171 places, 150 transitions, 1782 flow. Second operand 9 states and 112 transitions. [2024-06-21 17:06:15,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 166 transitions, 2364 flow [2024-06-21 17:06:15,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 166 transitions, 2218 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:15,783 INFO L231 Difference]: Finished difference. Result has 174 places, 150 transitions, 1780 flow [2024-06-21 17:06:15,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1780, PETRI_PLACES=174, PETRI_TRANSITIONS=150} [2024-06-21 17:06:15,784 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 17:06:15,784 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 150 transitions, 1780 flow [2024-06-21 17:06:15,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:15,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:15,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:06:15,784 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:15,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1376869184, now seen corresponding path program 3 times [2024-06-21 17:06:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:15,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819756591] [2024-06-21 17:06:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:16,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:16,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819756591] [2024-06-21 17:06:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819756591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:16,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:16,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277626556] [2024-06-21 17:06:16,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:16,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:16,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:16,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:16,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 150 transitions, 1780 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:16,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:16,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:16,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:16,630 INFO L124 PetriNetUnfolderBase]: 434/767 cut-off events. [2024-06-21 17:06:16,630 INFO L125 PetriNetUnfolderBase]: For 42777/42781 co-relation queries the response was YES. [2024-06-21 17:06:16,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 767 events. 434/767 cut-off events. For 42777/42781 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3398 event pairs, 76 based on Foata normal form. 5/771 useless extension candidates. Maximal degree in co-relation 5258. Up to 691 conditions per place. [2024-06-21 17:06:16,636 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 126 selfloop transitions, 33 changer transitions 0/161 dead transitions. [2024-06-21 17:06:16,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 161 transitions, 2136 flow [2024-06-21 17:06:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 17:06:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 17:06:16,637 INFO L175 Difference]: Start difference. First operand has 174 places, 150 transitions, 1780 flow. Second operand 10 states and 104 transitions. [2024-06-21 17:06:16,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 161 transitions, 2136 flow [2024-06-21 17:06:16,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 161 transitions, 1993 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:16,718 INFO L231 Difference]: Finished difference. Result has 176 places, 151 transitions, 1724 flow [2024-06-21 17:06:16,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1724, PETRI_PLACES=176, PETRI_TRANSITIONS=151} [2024-06-21 17:06:16,719 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-21 17:06:16,719 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 1724 flow [2024-06-21 17:06:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:16,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:16,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:06:16,719 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1376868905, now seen corresponding path program 10 times [2024-06-21 17:06:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235280273] [2024-06-21 17:06:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:17,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:17,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235280273] [2024-06-21 17:06:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235280273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:17,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:17,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:17,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459514721] [2024-06-21 17:06:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:17,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:17,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 1724 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:17,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:17,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:17,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:17,517 INFO L124 PetriNetUnfolderBase]: 436/772 cut-off events. [2024-06-21 17:06:17,518 INFO L125 PetriNetUnfolderBase]: For 45269/45269 co-relation queries the response was YES. [2024-06-21 17:06:17,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5192 conditions, 772 events. 436/772 cut-off events. For 45269/45269 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3474 event pairs, 58 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 5111. Up to 358 conditions per place. [2024-06-21 17:06:17,523 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 93 selfloop transitions, 77 changer transitions 0/172 dead transitions. [2024-06-21 17:06:17,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 172 transitions, 2480 flow [2024-06-21 17:06:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 17:06:17,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:06:17,524 INFO L175 Difference]: Start difference. First operand has 176 places, 151 transitions, 1724 flow. Second operand 10 states and 125 transitions. [2024-06-21 17:06:17,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 172 transitions, 2480 flow [2024-06-21 17:06:17,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 172 transitions, 2388 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:17,599 INFO L231 Difference]: Finished difference. Result has 177 places, 153 transitions, 1834 flow [2024-06-21 17:06:17,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1834, PETRI_PLACES=177, PETRI_TRANSITIONS=153} [2024-06-21 17:06:17,599 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-21 17:06:17,599 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 153 transitions, 1834 flow [2024-06-21 17:06:17,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:17,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:17,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:17,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:06:17,600 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:17,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1386065954, now seen corresponding path program 4 times [2024-06-21 17:06:17,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:17,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554169722] [2024-06-21 17:06:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:17,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554169722] [2024-06-21 17:06:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554169722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:18,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590084960] [2024-06-21 17:06:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:18,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:18,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:18,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:18,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 153 transitions, 1834 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:18,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:18,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:18,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:18,455 INFO L124 PetriNetUnfolderBase]: 432/764 cut-off events. [2024-06-21 17:06:18,455 INFO L125 PetriNetUnfolderBase]: For 41303/41307 co-relation queries the response was YES. [2024-06-21 17:06:18,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5244 conditions, 764 events. 432/764 cut-off events. For 41303/41307 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3374 event pairs, 75 based on Foata normal form. 5/768 useless extension candidates. Maximal degree in co-relation 5163. Up to 688 conditions per place. [2024-06-21 17:06:18,461 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 129 selfloop transitions, 33 changer transitions 0/164 dead transitions. [2024-06-21 17:06:18,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 164 transitions, 2196 flow [2024-06-21 17:06:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 17:06:18,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 17:06:18,461 INFO L175 Difference]: Start difference. First operand has 177 places, 153 transitions, 1834 flow. Second operand 10 states and 103 transitions. [2024-06-21 17:06:18,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 164 transitions, 2196 flow [2024-06-21 17:06:18,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 164 transitions, 1960 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:18,532 INFO L231 Difference]: Finished difference. Result has 178 places, 154 transitions, 1685 flow [2024-06-21 17:06:18,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1685, PETRI_PLACES=178, PETRI_TRANSITIONS=154} [2024-06-21 17:06:18,533 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 17:06:18,533 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 154 transitions, 1685 flow [2024-06-21 17:06:18,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:18,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:18,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:18,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:06:18,533 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:18,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1376861465, now seen corresponding path program 11 times [2024-06-21 17:06:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:18,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388190992] [2024-06-21 17:06:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:19,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:19,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388190992] [2024-06-21 17:06:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388190992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:19,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996351979] [2024-06-21 17:06:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:19,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:19,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:19,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 154 transitions, 1685 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:19,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:19,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:19,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:19,323 INFO L124 PetriNetUnfolderBase]: 428/759 cut-off events. [2024-06-21 17:06:19,323 INFO L125 PetriNetUnfolderBase]: For 40401/40401 co-relation queries the response was YES. [2024-06-21 17:06:19,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4943 conditions, 759 events. 428/759 cut-off events. For 40401/40401 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3384 event pairs, 56 based on Foata normal form. 2/760 useless extension candidates. Maximal degree in co-relation 4861. Up to 353 conditions per place. [2024-06-21 17:06:19,328 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 87 selfloop transitions, 83 changer transitions 0/172 dead transitions. [2024-06-21 17:06:19,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 172 transitions, 2301 flow [2024-06-21 17:06:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 17:06:19,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 17:06:19,329 INFO L175 Difference]: Start difference. First operand has 178 places, 154 transitions, 1685 flow. Second operand 10 states and 123 transitions. [2024-06-21 17:06:19,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 172 transitions, 2301 flow [2024-06-21 17:06:19,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 172 transitions, 2214 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:19,404 INFO L231 Difference]: Finished difference. Result has 180 places, 154 transitions, 1769 flow [2024-06-21 17:06:19,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1769, PETRI_PLACES=180, PETRI_TRANSITIONS=154} [2024-06-21 17:06:19,405 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-21 17:06:19,405 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 154 transitions, 1769 flow [2024-06-21 17:06:19,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:19,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:19,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:19,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:06:19,405 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:19,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:19,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1122505630, now seen corresponding path program 1 times [2024-06-21 17:06:19,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:19,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068607284] [2024-06-21 17:06:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:19,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:20,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068607284] [2024-06-21 17:06:20,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068607284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:20,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:20,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:20,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709790022] [2024-06-21 17:06:20,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:20,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:20,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 154 transitions, 1769 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:20,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:20,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:20,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:20,297 INFO L124 PetriNetUnfolderBase]: 453/809 cut-off events. [2024-06-21 17:06:20,297 INFO L125 PetriNetUnfolderBase]: For 42174/42178 co-relation queries the response was YES. [2024-06-21 17:06:20,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5275 conditions, 809 events. 453/809 cut-off events. For 42174/42178 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3704 event pairs, 74 based on Foata normal form. 6/814 useless extension candidates. Maximal degree in co-relation 5192. Up to 724 conditions per place. [2024-06-21 17:06:20,303 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 161 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-21 17:06:20,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 181 transitions, 2245 flow [2024-06-21 17:06:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 17:06:20,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 17:06:20,304 INFO L175 Difference]: Start difference. First operand has 180 places, 154 transitions, 1769 flow. Second operand 10 states and 103 transitions. [2024-06-21 17:06:20,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 181 transitions, 2245 flow [2024-06-21 17:06:20,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 181 transitions, 2031 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:20,389 INFO L231 Difference]: Finished difference. Result has 185 places, 162 transitions, 1684 flow [2024-06-21 17:06:20,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1684, PETRI_PLACES=185, PETRI_TRANSITIONS=162} [2024-06-21 17:06:20,391 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 17:06:20,391 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 162 transitions, 1684 flow [2024-06-21 17:06:20,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:20,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:20,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:20,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:06:20,392 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:20,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1658855346, now seen corresponding path program 2 times [2024-06-21 17:06:20,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:20,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926252342] [2024-06-21 17:06:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:20,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926252342] [2024-06-21 17:06:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926252342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:20,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652016268] [2024-06-21 17:06:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:20,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:21,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:21,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 162 transitions, 1684 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:21,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:21,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:21,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:21,304 INFO L124 PetriNetUnfolderBase]: 457/817 cut-off events. [2024-06-21 17:06:21,304 INFO L125 PetriNetUnfolderBase]: For 42939/42943 co-relation queries the response was YES. [2024-06-21 17:06:21,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5167 conditions, 817 events. 457/817 cut-off events. For 42939/42943 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3773 event pairs, 59 based on Foata normal form. 6/822 useless extension candidates. Maximal degree in co-relation 5079. Up to 690 conditions per place. [2024-06-21 17:06:21,311 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 155 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2024-06-21 17:06:21,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 178 transitions, 2084 flow [2024-06-21 17:06:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2024-06-21 17:06:21,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32616487455197135 [2024-06-21 17:06:21,312 INFO L175 Difference]: Start difference. First operand has 185 places, 162 transitions, 1684 flow. Second operand 9 states and 91 transitions. [2024-06-21 17:06:21,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 178 transitions, 2084 flow [2024-06-21 17:06:21,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 178 transitions, 2050 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:06:21,399 INFO L231 Difference]: Finished difference. Result has 190 places, 163 transitions, 1710 flow [2024-06-21 17:06:21,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1710, PETRI_PLACES=190, PETRI_TRANSITIONS=163} [2024-06-21 17:06:21,399 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-21 17:06:21,399 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 163 transitions, 1710 flow [2024-06-21 17:06:21,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:21,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:21,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:21,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:06:21,400 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:21,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1600762896, now seen corresponding path program 3 times [2024-06-21 17:06:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:21,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757383036] [2024-06-21 17:06:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757383036] [2024-06-21 17:06:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757383036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131678902] [2024-06-21 17:06:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:22,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:22,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:22,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 163 transitions, 1710 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:22,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:22,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:22,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:22,313 INFO L124 PetriNetUnfolderBase]: 468/838 cut-off events. [2024-06-21 17:06:22,313 INFO L125 PetriNetUnfolderBase]: For 47890/47894 co-relation queries the response was YES. [2024-06-21 17:06:22,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 838 events. 468/838 cut-off events. For 47890/47894 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3915 event pairs, 87 based on Foata normal form. 6/843 useless extension candidates. Maximal degree in co-relation 5343. Up to 705 conditions per place. [2024-06-21 17:06:22,319 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 154 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2024-06-21 17:06:22,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 181 transitions, 2252 flow [2024-06-21 17:06:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 17:06:22,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 17:06:22,320 INFO L175 Difference]: Start difference. First operand has 190 places, 163 transitions, 1710 flow. Second operand 9 states and 98 transitions. [2024-06-21 17:06:22,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 181 transitions, 2252 flow [2024-06-21 17:06:22,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 181 transitions, 2198 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:22,417 INFO L231 Difference]: Finished difference. Result has 192 places, 165 transitions, 1738 flow [2024-06-21 17:06:22,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1738, PETRI_PLACES=192, PETRI_TRANSITIONS=165} [2024-06-21 17:06:22,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-21 17:06:22,417 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 165 transitions, 1738 flow [2024-06-21 17:06:22,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:22,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:22,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:22,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:06:22,417 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:22,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1600647576, now seen corresponding path program 4 times [2024-06-21 17:06:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698651560] [2024-06-21 17:06:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:23,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:23,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698651560] [2024-06-21 17:06:23,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698651560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:23,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:23,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:23,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832596204] [2024-06-21 17:06:23,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:23,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:23,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:23,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:23,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 165 transitions, 1738 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:23,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:23,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:23,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:23,339 INFO L124 PetriNetUnfolderBase]: 472/846 cut-off events. [2024-06-21 17:06:23,339 INFO L125 PetriNetUnfolderBase]: For 48162/48166 co-relation queries the response was YES. [2024-06-21 17:06:23,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5463 conditions, 846 events. 472/846 cut-off events. For 48162/48166 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3982 event pairs, 85 based on Foata normal form. 6/851 useless extension candidates. Maximal degree in co-relation 5373. Up to 733 conditions per place. [2024-06-21 17:06:23,346 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 154 selfloop transitions, 26 changer transitions 0/182 dead transitions. [2024-06-21 17:06:23,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 182 transitions, 2272 flow [2024-06-21 17:06:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 17:06:23,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 17:06:23,348 INFO L175 Difference]: Start difference. First operand has 192 places, 165 transitions, 1738 flow. Second operand 9 states and 97 transitions. [2024-06-21 17:06:23,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 182 transitions, 2272 flow [2024-06-21 17:06:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 182 transitions, 2226 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:06:23,468 INFO L231 Difference]: Finished difference. Result has 196 places, 166 transitions, 1760 flow [2024-06-21 17:06:23,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1696, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1760, PETRI_PLACES=196, PETRI_TRANSITIONS=166} [2024-06-21 17:06:23,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 17:06:23,469 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 166 transitions, 1760 flow [2024-06-21 17:06:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:23,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:23,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:06:23,469 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:23,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash 188258166, now seen corresponding path program 5 times [2024-06-21 17:06:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:23,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091877756] [2024-06-21 17:06:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091877756] [2024-06-21 17:06:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091877756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:24,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889630545] [2024-06-21 17:06:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:24,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:24,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 166 transitions, 1760 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:24,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:24,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:24,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:24,467 INFO L124 PetriNetUnfolderBase]: 469/841 cut-off events. [2024-06-21 17:06:24,468 INFO L125 PetriNetUnfolderBase]: For 46140/46144 co-relation queries the response was YES. [2024-06-21 17:06:24,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5368 conditions, 841 events. 469/841 cut-off events. For 46140/46144 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3939 event pairs, 86 based on Foata normal form. 6/846 useless extension candidates. Maximal degree in co-relation 5276. Up to 747 conditions per place. [2024-06-21 17:06:24,475 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 153 selfloop transitions, 26 changer transitions 0/181 dead transitions. [2024-06-21 17:06:24,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 181 transitions, 2162 flow [2024-06-21 17:06:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-21 17:06:24,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34050179211469533 [2024-06-21 17:06:24,476 INFO L175 Difference]: Start difference. First operand has 196 places, 166 transitions, 1760 flow. Second operand 9 states and 95 transitions. [2024-06-21 17:06:24,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 181 transitions, 2162 flow [2024-06-21 17:06:24,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 181 transitions, 2101 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:24,572 INFO L231 Difference]: Finished difference. Result has 198 places, 166 transitions, 1756 flow [2024-06-21 17:06:24,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=198, PETRI_TRANSITIONS=166} [2024-06-21 17:06:24,573 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-21 17:06:24,573 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 166 transitions, 1756 flow [2024-06-21 17:06:24,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:24,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:24,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:24,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:06:24,573 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:24,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 26492168, now seen corresponding path program 1 times [2024-06-21 17:06:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:24,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864012613] [2024-06-21 17:06:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:25,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:25,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864012613] [2024-06-21 17:06:25,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864012613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:25,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904467673] [2024-06-21 17:06:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:25,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:25,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:25,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 166 transitions, 1756 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:25,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:25,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:25,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:25,488 INFO L124 PetriNetUnfolderBase]: 467/838 cut-off events. [2024-06-21 17:06:25,489 INFO L125 PetriNetUnfolderBase]: For 43905/43909 co-relation queries the response was YES. [2024-06-21 17:06:25,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5294 conditions, 838 events. 467/838 cut-off events. For 43905/43909 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3932 event pairs, 85 based on Foata normal form. 5/842 useless extension candidates. Maximal degree in co-relation 5201. Up to 741 conditions per place. [2024-06-21 17:06:25,496 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 150 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-21 17:06:25,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 181 transitions, 2160 flow [2024-06-21 17:06:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 17:06:25,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 17:06:25,497 INFO L175 Difference]: Start difference. First operand has 198 places, 166 transitions, 1756 flow. Second operand 9 states and 96 transitions. [2024-06-21 17:06:25,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 181 transitions, 2160 flow [2024-06-21 17:06:25,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 181 transitions, 2099 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:25,596 INFO L231 Difference]: Finished difference. Result has 199 places, 166 transitions, 1761 flow [2024-06-21 17:06:25,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1761, PETRI_PLACES=199, PETRI_TRANSITIONS=166} [2024-06-21 17:06:25,596 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 17:06:25,597 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 166 transitions, 1761 flow [2024-06-21 17:06:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:25,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:25,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:25,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:06:25,597 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:25,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1576380630, now seen corresponding path program 1 times [2024-06-21 17:06:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:25,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133741279] [2024-06-21 17:06:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:25,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:26,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:26,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133741279] [2024-06-21 17:06:26,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133741279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:26,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:26,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:26,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394724616] [2024-06-21 17:06:26,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:26,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:26,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:26,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 166 transitions, 1761 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:26,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:26,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:26,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:26,400 INFO L124 PetriNetUnfolderBase]: 463/832 cut-off events. [2024-06-21 17:06:26,400 INFO L125 PetriNetUnfolderBase]: For 43286/43290 co-relation queries the response was YES. [2024-06-21 17:06:26,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 832 events. 463/832 cut-off events. For 43286/43290 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3888 event pairs, 62 based on Foata normal form. 3/834 useless extension candidates. Maximal degree in co-relation 5077. Up to 499 conditions per place. [2024-06-21 17:06:26,407 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 96 selfloop transitions, 82 changer transitions 0/180 dead transitions. [2024-06-21 17:06:26,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 180 transitions, 2161 flow [2024-06-21 17:06:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 17:06:26,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 17:06:26,408 INFO L175 Difference]: Start difference. First operand has 199 places, 166 transitions, 1761 flow. Second operand 9 states and 108 transitions. [2024-06-21 17:06:26,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 180 transitions, 2161 flow [2024-06-21 17:06:26,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 180 transitions, 2038 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:26,497 INFO L231 Difference]: Finished difference. Result has 200 places, 166 transitions, 1816 flow [2024-06-21 17:06:26,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1816, PETRI_PLACES=200, PETRI_TRANSITIONS=166} [2024-06-21 17:06:26,497 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-21 17:06:26,497 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 166 transitions, 1816 flow [2024-06-21 17:06:26,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:26,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:26,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:26,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:06:26,498 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:26,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash 475617560, now seen corresponding path program 6 times [2024-06-21 17:06:26,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:26,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753229052] [2024-06-21 17:06:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:26,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:27,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753229052] [2024-06-21 17:06:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753229052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:27,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:27,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:27,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268222492] [2024-06-21 17:06:27,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:27,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:27,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:27,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:27,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 166 transitions, 1816 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:27,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:27,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:27,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:27,510 INFO L124 PetriNetUnfolderBase]: 467/840 cut-off events. [2024-06-21 17:06:27,511 INFO L125 PetriNetUnfolderBase]: For 44949/44953 co-relation queries the response was YES. [2024-06-21 17:06:27,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5324 conditions, 840 events. 467/840 cut-off events. For 44949/44953 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3964 event pairs, 59 based on Foata normal form. 3/842 useless extension candidates. Maximal degree in co-relation 5229. Up to 631 conditions per place. [2024-06-21 17:06:27,518 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 124 selfloop transitions, 55 changer transitions 0/181 dead transitions. [2024-06-21 17:06:27,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 181 transitions, 2228 flow [2024-06-21 17:06:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 17:06:27,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:06:27,519 INFO L175 Difference]: Start difference. First operand has 200 places, 166 transitions, 1816 flow. Second operand 9 states and 102 transitions. [2024-06-21 17:06:27,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 181 transitions, 2228 flow [2024-06-21 17:06:27,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 181 transitions, 2000 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:27,614 INFO L231 Difference]: Finished difference. Result has 199 places, 167 transitions, 1716 flow [2024-06-21 17:06:27,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1716, PETRI_PLACES=199, PETRI_TRANSITIONS=167} [2024-06-21 17:06:27,614 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 17:06:27,614 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 167 transitions, 1716 flow [2024-06-21 17:06:27,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:27,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:27,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:27,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:06:27,615 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:27,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1328648868, now seen corresponding path program 7 times [2024-06-21 17:06:27,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:27,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720710819] [2024-06-21 17:06:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:27,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:28,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720710819] [2024-06-21 17:06:28,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720710819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:28,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:28,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410718514] [2024-06-21 17:06:28,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:28,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:28,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:28,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:28,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:28,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:28,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 167 transitions, 1716 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:28,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:28,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:28,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:28,471 INFO L124 PetriNetUnfolderBase]: 471/848 cut-off events. [2024-06-21 17:06:28,471 INFO L125 PetriNetUnfolderBase]: For 46102/46106 co-relation queries the response was YES. [2024-06-21 17:06:28,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5259 conditions, 848 events. 471/848 cut-off events. For 46102/46106 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4009 event pairs, 67 based on Foata normal form. 3/850 useless extension candidates. Maximal degree in co-relation 5163. Up to 639 conditions per place. [2024-06-21 17:06:28,477 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 131 selfloop transitions, 49 changer transitions 0/182 dead transitions. [2024-06-21 17:06:28,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 182 transitions, 2132 flow [2024-06-21 17:06:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 17:06:28,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-21 17:06:28,478 INFO L175 Difference]: Start difference. First operand has 199 places, 167 transitions, 1716 flow. Second operand 9 states and 100 transitions. [2024-06-21 17:06:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 182 transitions, 2132 flow [2024-06-21 17:06:28,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 182 transitions, 2014 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:28,569 INFO L231 Difference]: Finished difference. Result has 201 places, 168 transitions, 1716 flow [2024-06-21 17:06:28,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1716, PETRI_PLACES=201, PETRI_TRANSITIONS=168} [2024-06-21 17:06:28,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-21 17:06:28,570 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 168 transitions, 1716 flow [2024-06-21 17:06:28,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:28,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:28,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:28,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:06:28,570 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1328653518, now seen corresponding path program 8 times [2024-06-21 17:06:28,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:28,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180503338] [2024-06-21 17:06:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:28,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:29,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:29,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180503338] [2024-06-21 17:06:29,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180503338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:29,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:29,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:29,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816597706] [2024-06-21 17:06:29,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:29,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:29,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:29,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:29,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 168 transitions, 1716 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:29,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:29,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:29,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:29,427 INFO L124 PetriNetUnfolderBase]: 475/856 cut-off events. [2024-06-21 17:06:29,427 INFO L125 PetriNetUnfolderBase]: For 47509/47513 co-relation queries the response was YES. [2024-06-21 17:06:29,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5298 conditions, 856 events. 475/856 cut-off events. For 47509/47513 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4083 event pairs, 67 based on Foata normal form. 3/858 useless extension candidates. Maximal degree in co-relation 5201. Up to 633 conditions per place. [2024-06-21 17:06:29,434 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 131 selfloop transitions, 50 changer transitions 0/183 dead transitions. [2024-06-21 17:06:29,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 183 transitions, 2134 flow [2024-06-21 17:06:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 17:06:29,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 17:06:29,435 INFO L175 Difference]: Start difference. First operand has 201 places, 168 transitions, 1716 flow. Second operand 9 states and 101 transitions. [2024-06-21 17:06:29,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 183 transitions, 2134 flow [2024-06-21 17:06:29,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 183 transitions, 2026 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:29,525 INFO L231 Difference]: Finished difference. Result has 203 places, 169 transitions, 1730 flow [2024-06-21 17:06:29,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1730, PETRI_PLACES=203, PETRI_TRANSITIONS=169} [2024-06-21 17:06:29,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-21 17:06:29,526 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 169 transitions, 1730 flow [2024-06-21 17:06:29,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:29,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:29,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:29,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:06:29,526 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:29,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1328768838, now seen corresponding path program 9 times [2024-06-21 17:06:29,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:29,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870606490] [2024-06-21 17:06:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:29,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:30,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:30,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870606490] [2024-06-21 17:06:30,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870606490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:30,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:30,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:30,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149524113] [2024-06-21 17:06:30,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:30,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:30,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:30,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 169 transitions, 1730 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:30,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:30,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:30,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:30,458 INFO L124 PetriNetUnfolderBase]: 479/864 cut-off events. [2024-06-21 17:06:30,458 INFO L125 PetriNetUnfolderBase]: For 49113/49117 co-relation queries the response was YES. [2024-06-21 17:06:30,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5359 conditions, 864 events. 479/864 cut-off events. For 49113/49117 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4122 event pairs, 69 based on Foata normal form. 3/866 useless extension candidates. Maximal degree in co-relation 5261. Up to 568 conditions per place. [2024-06-21 17:06:30,464 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 130 selfloop transitions, 53 changer transitions 0/185 dead transitions. [2024-06-21 17:06:30,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 185 transitions, 2286 flow [2024-06-21 17:06:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:30,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 17:06:30,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 17:06:30,466 INFO L175 Difference]: Start difference. First operand has 203 places, 169 transitions, 1730 flow. Second operand 9 states and 101 transitions. [2024-06-21 17:06:30,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 185 transitions, 2286 flow [2024-06-21 17:06:30,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 185 transitions, 2174 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:30,561 INFO L231 Difference]: Finished difference. Result has 205 places, 170 transitions, 1746 flow [2024-06-21 17:06:30,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1746, PETRI_PLACES=205, PETRI_TRANSITIONS=170} [2024-06-21 17:06:30,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-06-21 17:06:30,561 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 170 transitions, 1746 flow [2024-06-21 17:06:30,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:30,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:30,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:30,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:06:30,562 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:30,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:30,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2010305196, now seen corresponding path program 10 times [2024-06-21 17:06:30,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:30,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603282227] [2024-06-21 17:06:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:30,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:31,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603282227] [2024-06-21 17:06:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603282227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:31,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:31,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115393758] [2024-06-21 17:06:31,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:31,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:31,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 170 transitions, 1746 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:31,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:31,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:31,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:31,423 INFO L124 PetriNetUnfolderBase]: 483/872 cut-off events. [2024-06-21 17:06:31,423 INFO L125 PetriNetUnfolderBase]: For 50637/50641 co-relation queries the response was YES. [2024-06-21 17:06:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 872 events. 483/872 cut-off events. For 50637/50641 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4176 event pairs, 65 based on Foata normal form. 3/874 useless extension candidates. Maximal degree in co-relation 5327. Up to 663 conditions per place. [2024-06-21 17:06:31,430 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 131 selfloop transitions, 52 changer transitions 0/185 dead transitions. [2024-06-21 17:06:31,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 185 transitions, 2174 flow [2024-06-21 17:06:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 17:06:31,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:06:31,430 INFO L175 Difference]: Start difference. First operand has 205 places, 170 transitions, 1746 flow. Second operand 9 states and 102 transitions. [2024-06-21 17:06:31,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 185 transitions, 2174 flow [2024-06-21 17:06:31,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 185 transitions, 2046 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:31,538 INFO L231 Difference]: Finished difference. Result has 207 places, 171 transitions, 1748 flow [2024-06-21 17:06:31,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1748, PETRI_PLACES=207, PETRI_TRANSITIONS=171} [2024-06-21 17:06:31,538 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 17:06:31,538 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 171 transitions, 1748 flow [2024-06-21 17:06:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:31,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:31,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:06:31,539 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:31,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2010300546, now seen corresponding path program 11 times [2024-06-21 17:06:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:31,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782250384] [2024-06-21 17:06:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782250384] [2024-06-21 17:06:32,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782250384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:32,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:32,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869256557] [2024-06-21 17:06:32,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:32,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:32,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:32,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:32,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 171 transitions, 1748 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:32,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:32,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:32,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:32,373 INFO L124 PetriNetUnfolderBase]: 487/880 cut-off events. [2024-06-21 17:06:32,374 INFO L125 PetriNetUnfolderBase]: For 51904/51908 co-relation queries the response was YES. [2024-06-21 17:06:32,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5412 conditions, 880 events. 487/880 cut-off events. For 51904/51908 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4226 event pairs, 67 based on Foata normal form. 3/882 useless extension candidates. Maximal degree in co-relation 5313. Up to 651 conditions per place. [2024-06-21 17:06:32,381 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 130 selfloop transitions, 54 changer transitions 0/186 dead transitions. [2024-06-21 17:06:32,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 186 transitions, 2171 flow [2024-06-21 17:06:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 17:06:32,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:06:32,382 INFO L175 Difference]: Start difference. First operand has 207 places, 171 transitions, 1748 flow. Second operand 9 states and 102 transitions. [2024-06-21 17:06:32,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 186 transitions, 2171 flow [2024-06-21 17:06:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 186 transitions, 2012 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:32,474 INFO L231 Difference]: Finished difference. Result has 207 places, 172 transitions, 1718 flow [2024-06-21 17:06:32,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1718, PETRI_PLACES=207, PETRI_TRANSITIONS=172} [2024-06-21 17:06:32,475 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 17:06:32,475 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 172 transitions, 1718 flow [2024-06-21 17:06:32,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:32,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:32,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:06:32,475 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:32,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1115555306, now seen corresponding path program 12 times [2024-06-21 17:06:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407897908] [2024-06-21 17:06:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:33,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:33,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407897908] [2024-06-21 17:06:33,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407897908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:33,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:33,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749629121] [2024-06-21 17:06:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:33,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:33,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:33,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 172 transitions, 1718 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:33,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:33,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:33,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:33,298 INFO L124 PetriNetUnfolderBase]: 491/888 cut-off events. [2024-06-21 17:06:33,299 INFO L125 PetriNetUnfolderBase]: For 53526/53530 co-relation queries the response was YES. [2024-06-21 17:06:33,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5351 conditions, 888 events. 491/888 cut-off events. For 53526/53530 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4288 event pairs, 75 based on Foata normal form. 3/890 useless extension candidates. Maximal degree in co-relation 5253. Up to 652 conditions per place. [2024-06-21 17:06:33,306 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 135 selfloop transitions, 50 changer transitions 0/187 dead transitions. [2024-06-21 17:06:33,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 187 transitions, 2281 flow [2024-06-21 17:06:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 17:06:33,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-21 17:06:33,307 INFO L175 Difference]: Start difference. First operand has 207 places, 172 transitions, 1718 flow. Second operand 9 states and 103 transitions. [2024-06-21 17:06:33,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 187 transitions, 2281 flow [2024-06-21 17:06:33,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 187 transitions, 2163 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:33,414 INFO L231 Difference]: Finished difference. Result has 209 places, 173 transitions, 1721 flow [2024-06-21 17:06:33,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1721, PETRI_PLACES=209, PETRI_TRANSITIONS=173} [2024-06-21 17:06:33,414 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 17:06:33,414 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 173 transitions, 1721 flow [2024-06-21 17:06:33,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:33,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:33,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:33,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:06:33,415 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:33,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 899219246, now seen corresponding path program 13 times [2024-06-21 17:06:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:33,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113199318] [2024-06-21 17:06:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:34,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:34,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113199318] [2024-06-21 17:06:34,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113199318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:34,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:34,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:34,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240425706] [2024-06-21 17:06:34,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:34,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:34,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:34,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:34,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:34,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:34,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 173 transitions, 1721 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:34,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:34,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:34,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:34,412 INFO L124 PetriNetUnfolderBase]: 495/895 cut-off events. [2024-06-21 17:06:34,412 INFO L125 PetriNetUnfolderBase]: For 55084/55084 co-relation queries the response was YES. [2024-06-21 17:06:34,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5395 conditions, 895 events. 495/895 cut-off events. For 55084/55084 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4339 event pairs, 72 based on Foata normal form. 2/896 useless extension candidates. Maximal degree in co-relation 5296. Up to 687 conditions per place. [2024-06-21 17:06:34,419 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 137 selfloop transitions, 52 changer transitions 0/191 dead transitions. [2024-06-21 17:06:34,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 191 transitions, 2193 flow [2024-06-21 17:06:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 17:06:34,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:06:34,421 INFO L175 Difference]: Start difference. First operand has 209 places, 173 transitions, 1721 flow. Second operand 10 states and 110 transitions. [2024-06-21 17:06:34,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 191 transitions, 2193 flow [2024-06-21 17:06:34,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 191 transitions, 2065 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:34,520 INFO L231 Difference]: Finished difference. Result has 213 places, 176 transitions, 1747 flow [2024-06-21 17:06:34,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1747, PETRI_PLACES=213, PETRI_TRANSITIONS=176} [2024-06-21 17:06:34,521 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 17:06:34,521 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 176 transitions, 1747 flow [2024-06-21 17:06:34,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:34,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:34,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:06:34,521 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:34,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1121989046, now seen corresponding path program 14 times [2024-06-21 17:06:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:34,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327166477] [2024-06-21 17:06:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:35,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:35,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327166477] [2024-06-21 17:06:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327166477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:35,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:06:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228489269] [2024-06-21 17:06:35,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:35,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:06:35,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:35,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:06:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:06:35,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:35,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 176 transitions, 1747 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:35,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:35,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:35,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:35,377 INFO L124 PetriNetUnfolderBase]: 499/904 cut-off events. [2024-06-21 17:06:35,377 INFO L125 PetriNetUnfolderBase]: For 56728/56732 co-relation queries the response was YES. [2024-06-21 17:06:35,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5438 conditions, 904 events. 499/904 cut-off events. For 56728/56732 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4405 event pairs, 75 based on Foata normal form. 3/906 useless extension candidates. Maximal degree in co-relation 5337. Up to 695 conditions per place. [2024-06-21 17:06:35,384 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 140 selfloop transitions, 48 changer transitions 0/190 dead transitions. [2024-06-21 17:06:35,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 190 transitions, 2178 flow [2024-06-21 17:06:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:06:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:06:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 17:06:35,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:06:35,385 INFO L175 Difference]: Start difference. First operand has 213 places, 176 transitions, 1747 flow. Second operand 9 states and 102 transitions. [2024-06-21 17:06:35,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 190 transitions, 2178 flow [2024-06-21 17:06:35,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 190 transitions, 2079 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:35,501 INFO L231 Difference]: Finished difference. Result has 216 places, 177 transitions, 1769 flow [2024-06-21 17:06:35,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1769, PETRI_PLACES=216, PETRI_TRANSITIONS=177} [2024-06-21 17:06:35,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-21 17:06:35,501 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 177 transitions, 1769 flow [2024-06-21 17:06:35,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:35,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:35,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:06:35,502 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1122235310, now seen corresponding path program 1 times [2024-06-21 17:06:35,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:35,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884708600] [2024-06-21 17:06:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:35,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:36,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884708600] [2024-06-21 17:06:36,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884708600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:36,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879746826] [2024-06-21 17:06:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:36,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:36,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 177 transitions, 1769 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:36,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:36,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:36,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:36,646 INFO L124 PetriNetUnfolderBase]: 503/912 cut-off events. [2024-06-21 17:06:36,646 INFO L125 PetriNetUnfolderBase]: For 58385/58389 co-relation queries the response was YES. [2024-06-21 17:06:36,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5476 conditions, 912 events. 503/912 cut-off events. For 58385/58389 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4462 event pairs, 100 based on Foata normal form. 6/917 useless extension candidates. Maximal degree in co-relation 5373. Up to 828 conditions per place. [2024-06-21 17:06:36,653 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 155 selfloop transitions, 32 changer transitions 0/189 dead transitions. [2024-06-21 17:06:36,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 189 transitions, 2183 flow [2024-06-21 17:06:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 17:06:36,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 17:06:36,654 INFO L175 Difference]: Start difference. First operand has 216 places, 177 transitions, 1769 flow. Second operand 10 states and 103 transitions. [2024-06-21 17:06:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 189 transitions, 2183 flow [2024-06-21 17:06:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 189 transitions, 2073 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:36,758 INFO L231 Difference]: Finished difference. Result has 220 places, 179 transitions, 1752 flow [2024-06-21 17:06:36,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1752, PETRI_PLACES=220, PETRI_TRANSITIONS=179} [2024-06-21 17:06:36,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 17:06:36,759 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 179 transitions, 1752 flow [2024-06-21 17:06:36,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:36,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:36,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:06:36,759 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 593090652, now seen corresponding path program 15 times [2024-06-21 17:06:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:36,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502130854] [2024-06-21 17:06:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:37,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502130854] [2024-06-21 17:06:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502130854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:37,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:37,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:37,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318482984] [2024-06-21 17:06:37,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:37,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:37,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:37,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:37,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 179 transitions, 1752 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:37,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:37,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:37,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:37,755 INFO L124 PetriNetUnfolderBase]: 500/907 cut-off events. [2024-06-21 17:06:37,755 INFO L125 PetriNetUnfolderBase]: For 54297/54301 co-relation queries the response was YES. [2024-06-21 17:06:37,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5264 conditions, 907 events. 500/907 cut-off events. For 54297/54301 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4443 event pairs, 69 based on Foata normal form. 3/909 useless extension candidates. Maximal degree in co-relation 5159. Up to 698 conditions per place. [2024-06-21 17:06:37,763 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 135 selfloop transitions, 56 changer transitions 0/193 dead transitions. [2024-06-21 17:06:37,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 193 transitions, 2172 flow [2024-06-21 17:06:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 17:06:37,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:06:37,764 INFO L175 Difference]: Start difference. First operand has 220 places, 179 transitions, 1752 flow. Second operand 10 states and 110 transitions. [2024-06-21 17:06:37,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 193 transitions, 2172 flow [2024-06-21 17:06:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 193 transitions, 2089 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:06:37,893 INFO L231 Difference]: Finished difference. Result has 223 places, 179 transitions, 1785 flow [2024-06-21 17:06:37,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1669, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1785, PETRI_PLACES=223, PETRI_TRANSITIONS=179} [2024-06-21 17:06:37,894 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-21 17:06:37,894 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 179 transitions, 1785 flow [2024-06-21 17:06:37,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:37,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:37,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:06:37,894 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:37,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash -266735586, now seen corresponding path program 2 times [2024-06-21 17:06:37,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:37,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040529015] [2024-06-21 17:06:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:38,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:38,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040529015] [2024-06-21 17:06:38,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040529015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:38,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:38,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:38,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549057690] [2024-06-21 17:06:38,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:38,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:38,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:38,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 179 transitions, 1785 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:38,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:38,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:38,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:39,046 INFO L124 PetriNetUnfolderBase]: 506/917 cut-off events. [2024-06-21 17:06:39,046 INFO L125 PetriNetUnfolderBase]: For 55645/55649 co-relation queries the response was YES. [2024-06-21 17:06:39,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5371 conditions, 917 events. 506/917 cut-off events. For 55645/55649 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4517 event pairs, 74 based on Foata normal form. 3/919 useless extension candidates. Maximal degree in co-relation 5265. Up to 500 conditions per place. [2024-06-21 17:06:39,053 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 85 changer transitions 0/200 dead transitions. [2024-06-21 17:06:39,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 200 transitions, 2557 flow [2024-06-21 17:06:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 17:06:39,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 17:06:39,055 INFO L175 Difference]: Start difference. First operand has 223 places, 179 transitions, 1785 flow. Second operand 11 states and 133 transitions. [2024-06-21 17:06:39,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 200 transitions, 2557 flow [2024-06-21 17:06:39,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 200 transitions, 2393 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:39,171 INFO L231 Difference]: Finished difference. Result has 224 places, 181 transitions, 1822 flow [2024-06-21 17:06:39,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1822, PETRI_PLACES=224, PETRI_TRANSITIONS=181} [2024-06-21 17:06:39,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 17:06:39,172 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 181 transitions, 1822 flow [2024-06-21 17:06:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:39,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:39,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:39,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:06:39,172 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:39,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash -266966226, now seen corresponding path program 3 times [2024-06-21 17:06:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:39,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242713525] [2024-06-21 17:06:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242713525] [2024-06-21 17:06:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242713525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:39,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:39,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302079520] [2024-06-21 17:06:39,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:39,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:39,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:39,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:39,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:39,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 181 transitions, 1822 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:39,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:39,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:39,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:40,150 INFO L124 PetriNetUnfolderBase]: 502/911 cut-off events. [2024-06-21 17:06:40,150 INFO L125 PetriNetUnfolderBase]: For 51651/51655 co-relation queries the response was YES. [2024-06-21 17:06:40,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5212 conditions, 911 events. 502/911 cut-off events. For 51651/51655 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4497 event pairs, 71 based on Foata normal form. 3/913 useless extension candidates. Maximal degree in co-relation 5105. Up to 497 conditions per place. [2024-06-21 17:06:40,157 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 107 selfloop transitions, 90 changer transitions 0/199 dead transitions. [2024-06-21 17:06:40,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 199 transitions, 2418 flow [2024-06-21 17:06:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 17:06:40,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 17:06:40,158 INFO L175 Difference]: Start difference. First operand has 224 places, 181 transitions, 1822 flow. Second operand 11 states and 131 transitions. [2024-06-21 17:06:40,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 199 transitions, 2418 flow [2024-06-21 17:06:40,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 199 transitions, 2224 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:40,313 INFO L231 Difference]: Finished difference. Result has 226 places, 181 transitions, 1813 flow [2024-06-21 17:06:40,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1813, PETRI_PLACES=226, PETRI_TRANSITIONS=181} [2024-06-21 17:06:40,313 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-21 17:06:40,313 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 181 transitions, 1813 flow [2024-06-21 17:06:40,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:40,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:40,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:40,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:06:40,314 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:40,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash -266726906, now seen corresponding path program 2 times [2024-06-21 17:06:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:40,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898417077] [2024-06-21 17:06:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:40,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:40,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:40,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898417077] [2024-06-21 17:06:40,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898417077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:40,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:40,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:40,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435650167] [2024-06-21 17:06:40,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:40,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:40,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:40,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:41,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:41,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 181 transitions, 1813 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:41,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:41,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:41,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:41,333 INFO L124 PetriNetUnfolderBase]: 506/919 cut-off events. [2024-06-21 17:06:41,333 INFO L125 PetriNetUnfolderBase]: For 53099/53103 co-relation queries the response was YES. [2024-06-21 17:06:41,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5257 conditions, 919 events. 506/919 cut-off events. For 53099/53103 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4532 event pairs, 100 based on Foata normal form. 6/924 useless extension candidates. Maximal degree in co-relation 5149. Up to 835 conditions per place. [2024-06-21 17:06:41,340 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 157 selfloop transitions, 34 changer transitions 0/193 dead transitions. [2024-06-21 17:06:41,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 193 transitions, 2233 flow [2024-06-21 17:06:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:41,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 17:06:41,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 17:06:41,341 INFO L175 Difference]: Start difference. First operand has 226 places, 181 transitions, 1813 flow. Second operand 11 states and 112 transitions. [2024-06-21 17:06:41,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 193 transitions, 2233 flow [2024-06-21 17:06:41,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 193 transitions, 2023 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 17:06:41,466 INFO L231 Difference]: Finished difference. Result has 226 places, 182 transitions, 1691 flow [2024-06-21 17:06:41,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1691, PETRI_PLACES=226, PETRI_TRANSITIONS=182} [2024-06-21 17:06:41,467 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2024-06-21 17:06:41,467 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 182 transitions, 1691 flow [2024-06-21 17:06:41,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:41,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:41,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:41,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:06:41,467 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:41,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash 18372964, now seen corresponding path program 3 times [2024-06-21 17:06:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:41,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150129765] [2024-06-21 17:06:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:42,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:42,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150129765] [2024-06-21 17:06:42,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150129765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:42,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:42,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:42,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141562917] [2024-06-21 17:06:42,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:42,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:42,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:42,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:42,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:42,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:42,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 182 transitions, 1691 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:42,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:42,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:42,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:42,508 INFO L124 PetriNetUnfolderBase]: 510/927 cut-off events. [2024-06-21 17:06:42,508 INFO L125 PetriNetUnfolderBase]: For 54223/54227 co-relation queries the response was YES. [2024-06-21 17:06:42,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 927 events. 510/927 cut-off events. For 54223/54227 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4594 event pairs, 100 based on Foata normal form. 6/932 useless extension candidates. Maximal degree in co-relation 5042. Up to 843 conditions per place. [2024-06-21 17:06:42,515 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 158 selfloop transitions, 34 changer transitions 0/194 dead transitions. [2024-06-21 17:06:42,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 194 transitions, 2115 flow [2024-06-21 17:06:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-21 17:06:42,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-21 17:06:42,517 INFO L175 Difference]: Start difference. First operand has 226 places, 182 transitions, 1691 flow. Second operand 11 states and 111 transitions. [2024-06-21 17:06:42,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 194 transitions, 2115 flow [2024-06-21 17:06:42,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 194 transitions, 2037 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:42,646 INFO L231 Difference]: Finished difference. Result has 228 places, 183 transitions, 1703 flow [2024-06-21 17:06:42,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1703, PETRI_PLACES=228, PETRI_TRANSITIONS=183} [2024-06-21 17:06:42,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-06-21 17:06:42,647 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 183 transitions, 1703 flow [2024-06-21 17:06:42,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:42,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:42,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:42,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:06:42,647 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:42,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 779035728, now seen corresponding path program 4 times [2024-06-21 17:06:42,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:42,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950023855] [2024-06-21 17:06:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950023855] [2024-06-21 17:06:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950023855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:43,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:43,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300102772] [2024-06-21 17:06:43,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:43,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:43,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:43,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:43,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 183 transitions, 1703 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:43,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:43,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:43,803 INFO L124 PetriNetUnfolderBase]: 514/934 cut-off events. [2024-06-21 17:06:43,803 INFO L125 PetriNetUnfolderBase]: For 55626/55626 co-relation queries the response was YES. [2024-06-21 17:06:43,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5205 conditions, 934 events. 514/934 cut-off events. For 55626/55626 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4650 event pairs, 68 based on Foata normal form. 2/935 useless extension candidates. Maximal degree in co-relation 5095. Up to 579 conditions per place. [2024-06-21 17:06:43,811 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 111 selfloop transitions, 93 changer transitions 0/206 dead transitions. [2024-06-21 17:06:43,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 206 transitions, 2364 flow [2024-06-21 17:06:43,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:06:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:06:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-21 17:06:43,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-21 17:06:43,812 INFO L175 Difference]: Start difference. First operand has 228 places, 183 transitions, 1703 flow. Second operand 13 states and 144 transitions. [2024-06-21 17:06:43,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 206 transitions, 2364 flow [2024-06-21 17:06:43,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 206 transitions, 2282 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:43,956 INFO L231 Difference]: Finished difference. Result has 232 places, 184 transitions, 1833 flow [2024-06-21 17:06:43,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1833, PETRI_PLACES=232, PETRI_TRANSITIONS=184} [2024-06-21 17:06:43,956 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 17:06:43,956 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 184 transitions, 1833 flow [2024-06-21 17:06:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:43,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:43,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:43,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:06:43,957 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:43,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:43,957 INFO L85 PathProgramCache]: Analyzing trace with hash 779045958, now seen corresponding path program 5 times [2024-06-21 17:06:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:43,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876169140] [2024-06-21 17:06:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:44,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:44,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876169140] [2024-06-21 17:06:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876169140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:44,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:44,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806266112] [2024-06-21 17:06:44,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:44,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:44,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:44,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:44,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 184 transitions, 1833 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:44,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:44,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:44,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:45,243 INFO L124 PetriNetUnfolderBase]: 540/988 cut-off events. [2024-06-21 17:06:45,244 INFO L125 PetriNetUnfolderBase]: For 81707/81707 co-relation queries the response was YES. [2024-06-21 17:06:45,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6141 conditions, 988 events. 540/988 cut-off events. For 81707/81707 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4941 event pairs, 78 based on Foata normal form. 2/989 useless extension candidates. Maximal degree in co-relation 6030. Up to 533 conditions per place. [2024-06-21 17:06:45,251 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 114 selfloop transitions, 96 changer transitions 0/212 dead transitions. [2024-06-21 17:06:45,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 212 transitions, 2674 flow [2024-06-21 17:06:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:06:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:06:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 149 transitions. [2024-06-21 17:06:45,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369727047146402 [2024-06-21 17:06:45,252 INFO L175 Difference]: Start difference. First operand has 232 places, 184 transitions, 1833 flow. Second operand 13 states and 149 transitions. [2024-06-21 17:06:45,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 212 transitions, 2674 flow [2024-06-21 17:06:45,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 212 transitions, 2474 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 17:06:45,421 INFO L231 Difference]: Finished difference. Result has 234 places, 184 transitions, 1829 flow [2024-06-21 17:06:45,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1829, PETRI_PLACES=234, PETRI_TRANSITIONS=184} [2024-06-21 17:06:45,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 17:06:45,422 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 184 transitions, 1829 flow [2024-06-21 17:06:45,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:45,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:45,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:45,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:06:45,422 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:45,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:45,422 INFO L85 PathProgramCache]: Analyzing trace with hash 768907718, now seen corresponding path program 4 times [2024-06-21 17:06:45,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:45,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904607956] [2024-06-21 17:06:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:45,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:46,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:46,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904607956] [2024-06-21 17:06:46,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904607956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:46,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:46,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:46,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650182132] [2024-06-21 17:06:46,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:46,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:46,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:46,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 184 transitions, 1829 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:46,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:46,513 INFO L124 PetriNetUnfolderBase]: 536/983 cut-off events. [2024-06-21 17:06:46,514 INFO L125 PetriNetUnfolderBase]: For 77376/77380 co-relation queries the response was YES. [2024-06-21 17:06:46,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5962 conditions, 983 events. 536/983 cut-off events. For 77376/77380 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4946 event pairs, 95 based on Foata normal form. 3/985 useless extension candidates. Maximal degree in co-relation 5850. Up to 572 conditions per place. [2024-06-21 17:06:46,521 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 108 selfloop transitions, 90 changer transitions 0/200 dead transitions. [2024-06-21 17:06:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 200 transitions, 2271 flow [2024-06-21 17:06:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 17:06:46,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 17:06:46,522 INFO L175 Difference]: Start difference. First operand has 234 places, 184 transitions, 1829 flow. Second operand 11 states and 127 transitions. [2024-06-21 17:06:46,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 200 transitions, 2271 flow [2024-06-21 17:06:46,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 200 transitions, 1997 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-21 17:06:46,677 INFO L231 Difference]: Finished difference. Result has 233 places, 184 transitions, 1740 flow [2024-06-21 17:06:46,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1740, PETRI_PLACES=233, PETRI_TRANSITIONS=184} [2024-06-21 17:06:46,678 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 17:06:46,678 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 184 transitions, 1740 flow [2024-06-21 17:06:46,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:46,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:46,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:46,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:06:46,678 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:46,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1731285624, now seen corresponding path program 1 times [2024-06-21 17:06:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705790766] [2024-06-21 17:06:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:47,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:47,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705790766] [2024-06-21 17:06:47,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705790766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:47,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27472298] [2024-06-21 17:06:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:47,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:47,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:47,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 184 transitions, 1740 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:47,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:47,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:47,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:47,645 INFO L124 PetriNetUnfolderBase]: 511/932 cut-off events. [2024-06-21 17:06:47,645 INFO L125 PetriNetUnfolderBase]: For 46698/46702 co-relation queries the response was YES. [2024-06-21 17:06:47,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4898 conditions, 932 events. 511/932 cut-off events. For 46698/46702 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4657 event pairs, 67 based on Foata normal form. 6/937 useless extension candidates. Maximal degree in co-relation 4786. Up to 793 conditions per place. [2024-06-21 17:06:47,652 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 176 selfloop transitions, 23 changer transitions 0/201 dead transitions. [2024-06-21 17:06:47,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 201 transitions, 2192 flow [2024-06-21 17:06:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 17:06:47,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3193548387096774 [2024-06-21 17:06:47,653 INFO L175 Difference]: Start difference. First operand has 233 places, 184 transitions, 1740 flow. Second operand 10 states and 99 transitions. [2024-06-21 17:06:47,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 201 transitions, 2192 flow [2024-06-21 17:06:47,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 201 transitions, 1985 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 17:06:47,781 INFO L231 Difference]: Finished difference. Result has 232 places, 185 transitions, 1604 flow [2024-06-21 17:06:47,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1604, PETRI_PLACES=232, PETRI_TRANSITIONS=185} [2024-06-21 17:06:47,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 17:06:47,782 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 185 transitions, 1604 flow [2024-06-21 17:06:47,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:47,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:47,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:47,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:06:47,782 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:47,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:47,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1919678134, now seen corresponding path program 2 times [2024-06-21 17:06:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:47,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902993656] [2024-06-21 17:06:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:47,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:48,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:48,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902993656] [2024-06-21 17:06:48,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902993656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:48,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:48,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857871457] [2024-06-21 17:06:48,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:48,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:48,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 185 transitions, 1604 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:48,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:48,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:48,806 INFO L124 PetriNetUnfolderBase]: 522/953 cut-off events. [2024-06-21 17:06:48,806 INFO L125 PetriNetUnfolderBase]: For 54414/54418 co-relation queries the response was YES. [2024-06-21 17:06:48,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5017 conditions, 953 events. 522/953 cut-off events. For 54414/54418 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4791 event pairs, 92 based on Foata normal form. 6/958 useless extension candidates. Maximal degree in co-relation 4904. Up to 829 conditions per place. [2024-06-21 17:06:48,813 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 171 selfloop transitions, 31 changer transitions 0/204 dead transitions. [2024-06-21 17:06:48,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 204 transitions, 2256 flow [2024-06-21 17:06:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 17:06:48,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 17:06:48,814 INFO L175 Difference]: Start difference. First operand has 232 places, 185 transitions, 1604 flow. Second operand 10 states and 106 transitions. [2024-06-21 17:06:48,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 204 transitions, 2256 flow [2024-06-21 17:06:48,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 204 transitions, 2197 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 17:06:48,945 INFO L231 Difference]: Finished difference. Result has 234 places, 187 transitions, 1653 flow [2024-06-21 17:06:48,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1653, PETRI_PLACES=234, PETRI_TRANSITIONS=187} [2024-06-21 17:06:48,945 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 17:06:48,945 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 187 transitions, 1653 flow [2024-06-21 17:06:48,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:48,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:48,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:48,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:06:48,946 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:48,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:48,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1915959064, now seen corresponding path program 3 times [2024-06-21 17:06:48,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696186733] [2024-06-21 17:06:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:49,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696186733] [2024-06-21 17:06:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696186733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:49,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:49,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775725847] [2024-06-21 17:06:49,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:49,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:49,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:49,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:49,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:49,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 187 transitions, 1653 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:49,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:49,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:49,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:49,918 INFO L124 PetriNetUnfolderBase]: 533/974 cut-off events. [2024-06-21 17:06:49,919 INFO L125 PetriNetUnfolderBase]: For 63785/63789 co-relation queries the response was YES. [2024-06-21 17:06:49,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 974 events. 533/974 cut-off events. For 63785/63789 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4950 event pairs, 97 based on Foata normal form. 6/979 useless extension candidates. Maximal degree in co-relation 5224. Up to 791 conditions per place. [2024-06-21 17:06:49,927 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 173 selfloop transitions, 31 changer transitions 0/206 dead transitions. [2024-06-21 17:06:49,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 206 transitions, 2311 flow [2024-06-21 17:06:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 17:06:49,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 17:06:49,928 INFO L175 Difference]: Start difference. First operand has 234 places, 187 transitions, 1653 flow. Second operand 10 states and 108 transitions. [2024-06-21 17:06:49,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 206 transitions, 2311 flow [2024-06-21 17:06:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 206 transitions, 2248 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:50,089 INFO L231 Difference]: Finished difference. Result has 238 places, 189 transitions, 1702 flow [2024-06-21 17:06:50,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1702, PETRI_PLACES=238, PETRI_TRANSITIONS=189} [2024-06-21 17:06:50,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 17:06:50,089 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 189 transitions, 1702 flow [2024-06-21 17:06:50,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:50,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:50,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:50,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:06:50,089 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:50,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1655499174, now seen corresponding path program 4 times [2024-06-21 17:06:50,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:50,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255713157] [2024-06-21 17:06:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:50,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255713157] [2024-06-21 17:06:50,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255713157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:50,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:50,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:50,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561695424] [2024-06-21 17:06:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:50,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:50,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:50,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:50,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 189 transitions, 1702 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:50,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:50,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:50,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:51,122 INFO L124 PetriNetUnfolderBase]: 530/969 cut-off events. [2024-06-21 17:06:51,122 INFO L125 PetriNetUnfolderBase]: For 58159/58163 co-relation queries the response was YES. [2024-06-21 17:06:51,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5174 conditions, 969 events. 530/969 cut-off events. For 58159/58163 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4916 event pairs, 96 based on Foata normal form. 6/974 useless extension candidates. Maximal degree in co-relation 5058. Up to 864 conditions per place. [2024-06-21 17:06:51,131 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 172 selfloop transitions, 31 changer transitions 0/205 dead transitions. [2024-06-21 17:06:51,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 205 transitions, 2152 flow [2024-06-21 17:06:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 17:06:51,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 17:06:51,132 INFO L175 Difference]: Start difference. First operand has 238 places, 189 transitions, 1702 flow. Second operand 10 states and 104 transitions. [2024-06-21 17:06:51,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 205 transitions, 2152 flow [2024-06-21 17:06:51,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 205 transitions, 2077 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:06:51,280 INFO L231 Difference]: Finished difference. Result has 242 places, 189 transitions, 1694 flow [2024-06-21 17:06:51,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1627, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1694, PETRI_PLACES=242, PETRI_TRANSITIONS=189} [2024-06-21 17:06:51,281 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 17:06:51,281 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 189 transitions, 1694 flow [2024-06-21 17:06:51,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:51,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:51,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:51,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:06:51,281 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:51,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:51,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1919533984, now seen corresponding path program 5 times [2024-06-21 17:06:51,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:51,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969050665] [2024-06-21 17:06:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:51,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969050665] [2024-06-21 17:06:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969050665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:51,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486709677] [2024-06-21 17:06:51,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:52,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 189 transitions, 1694 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:52,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:52,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:52,289 INFO L124 PetriNetUnfolderBase]: 527/964 cut-off events. [2024-06-21 17:06:52,289 INFO L125 PetriNetUnfolderBase]: For 51890/51894 co-relation queries the response was YES. [2024-06-21 17:06:52,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4960 conditions, 964 events. 527/964 cut-off events. For 51890/51894 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4900 event pairs, 91 based on Foata normal form. 6/969 useless extension candidates. Maximal degree in co-relation 4842. Up to 819 conditions per place. [2024-06-21 17:06:52,296 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 172 selfloop transitions, 31 changer transitions 0/205 dead transitions. [2024-06-21 17:06:52,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 205 transitions, 2140 flow [2024-06-21 17:06:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 17:06:52,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 17:06:52,297 INFO L175 Difference]: Start difference. First operand has 242 places, 189 transitions, 1694 flow. Second operand 10 states and 106 transitions. [2024-06-21 17:06:52,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 205 transitions, 2140 flow [2024-06-21 17:06:52,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 205 transitions, 2063 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:52,417 INFO L231 Difference]: Finished difference. Result has 243 places, 189 transitions, 1683 flow [2024-06-21 17:06:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1683, PETRI_PLACES=243, PETRI_TRANSITIONS=189} [2024-06-21 17:06:52,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 17:06:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 189 transitions, 1683 flow [2024-06-21 17:06:52,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:52,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:06:52,418 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:52,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:52,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1623157924, now seen corresponding path program 1 times [2024-06-21 17:06:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217854388] [2024-06-21 17:06:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:53,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:53,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217854388] [2024-06-21 17:06:53,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217854388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:53,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:53,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291975012] [2024-06-21 17:06:53,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:53,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:53,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:53,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:53,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:53,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:53,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 189 transitions, 1683 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:53,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:53,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:53,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:53,488 INFO L124 PetriNetUnfolderBase]: 553/1018 cut-off events. [2024-06-21 17:06:53,488 INFO L125 PetriNetUnfolderBase]: For 82080/82084 co-relation queries the response was YES. [2024-06-21 17:06:53,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5133 conditions, 1018 events. 553/1018 cut-off events. For 82080/82084 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5245 event pairs, 94 based on Foata normal form. 14/1031 useless extension candidates. Maximal degree in co-relation 5014. Up to 875 conditions per place. [2024-06-21 17:06:53,497 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 177 selfloop transitions, 20 changer transitions 16/215 dead transitions. [2024-06-21 17:06:53,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 215 transitions, 2214 flow [2024-06-21 17:06:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 17:06:53,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 17:06:53,499 INFO L175 Difference]: Start difference. First operand has 243 places, 189 transitions, 1683 flow. Second operand 11 states and 117 transitions. [2024-06-21 17:06:53,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 215 transitions, 2214 flow [2024-06-21 17:06:53,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 215 transitions, 2121 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:53,655 INFO L231 Difference]: Finished difference. Result has 245 places, 186 transitions, 1606 flow [2024-06-21 17:06:53,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1606, PETRI_PLACES=245, PETRI_TRANSITIONS=186} [2024-06-21 17:06:53,655 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 17:06:53,655 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 186 transitions, 1606 flow [2024-06-21 17:06:53,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:53,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:53,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:06:53,656 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:53,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash -799962652, now seen corresponding path program 6 times [2024-06-21 17:06:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775204871] [2024-06-21 17:06:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775204871] [2024-06-21 17:06:54,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775204871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:54,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:54,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:54,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801073576] [2024-06-21 17:06:54,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:54,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:54,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:54,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:54,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 186 transitions, 1606 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:54,671 INFO L124 PetriNetUnfolderBase]: 537/994 cut-off events. [2024-06-21 17:06:54,671 INFO L125 PetriNetUnfolderBase]: For 91780/91784 co-relation queries the response was YES. [2024-06-21 17:06:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4972 conditions, 994 events. 537/994 cut-off events. For 91780/91784 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5111 event pairs, 88 based on Foata normal form. 13/1006 useless extension candidates. Maximal degree in co-relation 4852. Up to 547 conditions per place. [2024-06-21 17:06:54,679 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 112 selfloop transitions, 85 changer transitions 7/206 dead transitions. [2024-06-21 17:06:54,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 206 transitions, 2102 flow [2024-06-21 17:06:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 17:06:54,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 17:06:54,680 INFO L175 Difference]: Start difference. First operand has 245 places, 186 transitions, 1606 flow. Second operand 10 states and 121 transitions. [2024-06-21 17:06:54,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 206 transitions, 2102 flow [2024-06-21 17:06:54,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 206 transitions, 2052 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:54,822 INFO L231 Difference]: Finished difference. Result has 242 places, 184 transitions, 1730 flow [2024-06-21 17:06:54,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1730, PETRI_PLACES=242, PETRI_TRANSITIONS=184} [2024-06-21 17:06:54,823 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 17:06:54,823 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 184 transitions, 1730 flow [2024-06-21 17:06:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:54,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:54,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:06:54,823 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:54,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:54,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1898111350, now seen corresponding path program 2 times [2024-06-21 17:06:54,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:54,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402854802] [2024-06-21 17:06:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:54,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:55,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:55,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402854802] [2024-06-21 17:06:55,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402854802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:55,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:55,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:06:55,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035035425] [2024-06-21 17:06:55,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:55,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:06:55,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:55,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:06:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:06:55,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:55,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 184 transitions, 1730 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:55,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:55,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:55,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:55,709 INFO L124 PetriNetUnfolderBase]: 561/1046 cut-off events. [2024-06-21 17:06:55,709 INFO L125 PetriNetUnfolderBase]: For 122492/122496 co-relation queries the response was YES. [2024-06-21 17:06:55,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1046 events. 561/1046 cut-off events. For 122492/122496 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5400 event pairs, 98 based on Foata normal form. 9/1054 useless extension candidates. Maximal degree in co-relation 6238. Up to 505 conditions per place. [2024-06-21 17:06:55,718 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 83 changer transitions 6/208 dead transitions. [2024-06-21 17:06:55,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 208 transitions, 2424 flow [2024-06-21 17:06:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 17:06:55,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 17:06:55,719 INFO L175 Difference]: Start difference. First operand has 242 places, 184 transitions, 1730 flow. Second operand 10 states and 123 transitions. [2024-06-21 17:06:55,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 208 transitions, 2424 flow [2024-06-21 17:06:56,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 208 transitions, 2219 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:56,037 INFO L231 Difference]: Finished difference. Result has 243 places, 183 transitions, 1689 flow [2024-06-21 17:06:56,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1689, PETRI_PLACES=243, PETRI_TRANSITIONS=183} [2024-06-21 17:06:56,037 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 17:06:56,037 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 183 transitions, 1689 flow [2024-06-21 17:06:56,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:56,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:56,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:56,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:06:56,038 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:56,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1329932966, now seen corresponding path program 3 times [2024-06-21 17:06:56,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:56,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414497724] [2024-06-21 17:06:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:56,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:56,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:56,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:56,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414497724] [2024-06-21 17:06:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414497724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:56,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:56,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652965076] [2024-06-21 17:06:56,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:56,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:56,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:56,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 183 transitions, 1689 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:56,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:56,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:56,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:57,310 INFO L124 PetriNetUnfolderBase]: 567/1060 cut-off events. [2024-06-21 17:06:57,310 INFO L125 PetriNetUnfolderBase]: For 132165/132169 co-relation queries the response was YES. [2024-06-21 17:06:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6382 conditions, 1060 events. 567/1060 cut-off events. For 132165/132169 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5528 event pairs, 102 based on Foata normal form. 11/1070 useless extension candidates. Maximal degree in co-relation 6262. Up to 615 conditions per place. [2024-06-21 17:06:57,319 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 111 selfloop transitions, 84 changer transitions 9/206 dead transitions. [2024-06-21 17:06:57,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 206 transitions, 2187 flow [2024-06-21 17:06:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:06:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:06:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 17:06:57,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 17:06:57,320 INFO L175 Difference]: Start difference. First operand has 243 places, 183 transitions, 1689 flow. Second operand 11 states and 129 transitions. [2024-06-21 17:06:57,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 206 transitions, 2187 flow [2024-06-21 17:06:57,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 206 transitions, 2015 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:06:57,573 INFO L231 Difference]: Finished difference. Result has 244 places, 182 transitions, 1685 flow [2024-06-21 17:06:57,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1685, PETRI_PLACES=244, PETRI_TRANSITIONS=182} [2024-06-21 17:06:57,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-21 17:06:57,574 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 182 transitions, 1685 flow [2024-06-21 17:06:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:57,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:57,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:06:57,574 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:57,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1859249340, now seen corresponding path program 7 times [2024-06-21 17:06:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980193417] [2024-06-21 17:06:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:58,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980193417] [2024-06-21 17:06:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980193417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:58,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:58,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:58,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677407088] [2024-06-21 17:06:58,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:58,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:58,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:58,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:58,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 182 transitions, 1685 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:58,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:58,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:58,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:06:58,754 INFO L124 PetriNetUnfolderBase]: 509/946 cut-off events. [2024-06-21 17:06:58,755 INFO L125 PetriNetUnfolderBase]: For 55776/55780 co-relation queries the response was YES. [2024-06-21 17:06:58,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4956 conditions, 946 events. 509/946 cut-off events. For 55776/55780 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4840 event pairs, 84 based on Foata normal form. 3/948 useless extension candidates. Maximal degree in co-relation 4836. Up to 551 conditions per place. [2024-06-21 17:06:58,765 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 82 changer transitions 0/198 dead transitions. [2024-06-21 17:06:58,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 198 transitions, 2143 flow [2024-06-21 17:06:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:06:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:06:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 17:06:58,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 17:06:58,766 INFO L175 Difference]: Start difference. First operand has 244 places, 182 transitions, 1685 flow. Second operand 10 states and 115 transitions. [2024-06-21 17:06:58,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 198 transitions, 2143 flow [2024-06-21 17:06:58,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 198 transitions, 1971 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 17:06:58,925 INFO L231 Difference]: Finished difference. Result has 243 places, 183 transitions, 1707 flow [2024-06-21 17:06:58,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1707, PETRI_PLACES=243, PETRI_TRANSITIONS=183} [2024-06-21 17:06:58,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 17:06:58,925 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 183 transitions, 1707 flow [2024-06-21 17:06:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:06:58,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:06:58,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:06:58,926 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:06:58,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:06:58,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1859459086, now seen corresponding path program 4 times [2024-06-21 17:06:58,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:06:58,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486824691] [2024-06-21 17:06:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:06:58,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:06:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:06:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:06:59,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:06:59,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486824691] [2024-06-21 17:06:59,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486824691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:06:59,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:06:59,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:06:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695453182] [2024-06-21 17:06:59,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:06:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:06:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:06:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:06:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:06:59,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:06:59,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 183 transitions, 1707 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:06:59,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:06:59,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:06:59,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:00,178 INFO L124 PetriNetUnfolderBase]: 531/992 cut-off events. [2024-06-21 17:07:00,178 INFO L125 PetriNetUnfolderBase]: For 86195/86199 co-relation queries the response was YES. [2024-06-21 17:07:00,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5108 conditions, 992 events. 531/992 cut-off events. For 86195/86199 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5148 event pairs, 88 based on Foata normal form. 11/1002 useless extension candidates. Maximal degree in co-relation 4988. Up to 547 conditions per place. [2024-06-21 17:07:00,186 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 110 selfloop transitions, 78 changer transitions 16/206 dead transitions. [2024-06-21 17:07:00,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 206 transitions, 2205 flow [2024-06-21 17:07:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 17:07:00,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 17:07:00,187 INFO L175 Difference]: Start difference. First operand has 243 places, 183 transitions, 1707 flow. Second operand 11 states and 128 transitions. [2024-06-21 17:07:00,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 206 transitions, 2205 flow [2024-06-21 17:07:00,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 206 transitions, 2017 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:00,355 INFO L231 Difference]: Finished difference. Result has 246 places, 179 transitions, 1653 flow [2024-06-21 17:07:00,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1653, PETRI_PLACES=246, PETRI_TRANSITIONS=179} [2024-06-21 17:07:00,355 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-21 17:07:00,355 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 179 transitions, 1653 flow [2024-06-21 17:07:00,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:00,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:00,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:07:00,355 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:00,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1859243760, now seen corresponding path program 8 times [2024-06-21 17:07:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:00,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51253022] [2024-06-21 17:07:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:00,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:00,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:00,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51253022] [2024-06-21 17:07:00,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51253022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:00,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708745769] [2024-06-21 17:07:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:00,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:01,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:01,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 179 transitions, 1653 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:01,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:01,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:01,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:01,277 INFO L124 PetriNetUnfolderBase]: 499/932 cut-off events. [2024-06-21 17:07:01,277 INFO L125 PetriNetUnfolderBase]: For 57100/57104 co-relation queries the response was YES. [2024-06-21 17:07:01,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4889 conditions, 932 events. 499/932 cut-off events. For 57100/57104 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4792 event pairs, 82 based on Foata normal form. 3/934 useless extension candidates. Maximal degree in co-relation 4768. Up to 535 conditions per place. [2024-06-21 17:07:01,284 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 112 selfloop transitions, 81 changer transitions 0/195 dead transitions. [2024-06-21 17:07:01,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 195 transitions, 2105 flow [2024-06-21 17:07:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 17:07:01,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 17:07:01,285 INFO L175 Difference]: Start difference. First operand has 246 places, 179 transitions, 1653 flow. Second operand 10 states and 114 transitions. [2024-06-21 17:07:01,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 195 transitions, 2105 flow [2024-06-21 17:07:01,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 195 transitions, 1935 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:01,439 INFO L231 Difference]: Finished difference. Result has 241 places, 180 transitions, 1677 flow [2024-06-21 17:07:01,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1677, PETRI_PLACES=241, PETRI_TRANSITIONS=180} [2024-06-21 17:07:01,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-21 17:07:01,440 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 180 transitions, 1677 flow [2024-06-21 17:07:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:01,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:01,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:01,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:07:01,441 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:01,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash 663139516, now seen corresponding path program 9 times [2024-06-21 17:07:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:01,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376219971] [2024-06-21 17:07:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:01,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:02,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376219971] [2024-06-21 17:07:02,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376219971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:02,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:02,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:02,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906571617] [2024-06-21 17:07:02,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:02,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:02,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:02,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:02,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 180 transitions, 1677 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:02,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:02,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:02,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:02,363 INFO L124 PetriNetUnfolderBase]: 503/940 cut-off events. [2024-06-21 17:07:02,363 INFO L125 PetriNetUnfolderBase]: For 54842/54846 co-relation queries the response was YES. [2024-06-21 17:07:02,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 940 events. 503/940 cut-off events. For 54842/54846 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4881 event pairs, 84 based on Foata normal form. 3/942 useless extension candidates. Maximal degree in co-relation 4806. Up to 557 conditions per place. [2024-06-21 17:07:02,371 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 87 changer transitions 0/196 dead transitions. [2024-06-21 17:07:02,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 196 transitions, 2131 flow [2024-06-21 17:07:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 17:07:02,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 17:07:02,372 INFO L175 Difference]: Start difference. First operand has 241 places, 180 transitions, 1677 flow. Second operand 10 states and 113 transitions. [2024-06-21 17:07:02,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 196 transitions, 2131 flow [2024-06-21 17:07:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 196 transitions, 1951 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:02,510 INFO L231 Difference]: Finished difference. Result has 243 places, 181 transitions, 1701 flow [2024-06-21 17:07:02,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1701, PETRI_PLACES=243, PETRI_TRANSITIONS=181} [2024-06-21 17:07:02,511 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 17:07:02,511 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 181 transitions, 1701 flow [2024-06-21 17:07:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:02,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:02,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:07:02,511 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:02,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1536594342, now seen corresponding path program 10 times [2024-06-21 17:07:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:02,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748056223] [2024-06-21 17:07:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:02,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:03,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:03,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748056223] [2024-06-21 17:07:03,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748056223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:03,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:03,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:03,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904940945] [2024-06-21 17:07:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:03,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:03,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:03,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:03,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:03,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 181 transitions, 1701 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:03,422 INFO L124 PetriNetUnfolderBase]: 507/948 cut-off events. [2024-06-21 17:07:03,422 INFO L125 PetriNetUnfolderBase]: For 56181/56185 co-relation queries the response was YES. [2024-06-21 17:07:03,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 948 events. 507/948 cut-off events. For 56181/56185 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 4885 event pairs, 86 based on Foata normal form. 3/950 useless extension candidates. Maximal degree in co-relation 4876. Up to 565 conditions per place. [2024-06-21 17:07:03,429 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 117 selfloop transitions, 78 changer transitions 0/197 dead transitions. [2024-06-21 17:07:03,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 197 transitions, 2159 flow [2024-06-21 17:07:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 17:07:03,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 17:07:03,430 INFO L175 Difference]: Start difference. First operand has 243 places, 181 transitions, 1701 flow. Second operand 10 states and 114 transitions. [2024-06-21 17:07:03,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 197 transitions, 2159 flow [2024-06-21 17:07:03,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 197 transitions, 1965 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:03,584 INFO L231 Difference]: Finished difference. Result has 245 places, 182 transitions, 1695 flow [2024-06-21 17:07:03,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1695, PETRI_PLACES=245, PETRI_TRANSITIONS=182} [2024-06-21 17:07:03,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 17:07:03,585 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 182 transitions, 1695 flow [2024-06-21 17:07:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:03,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:03,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:03,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:07:03,585 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:03,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 663133936, now seen corresponding path program 11 times [2024-06-21 17:07:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:03,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793603176] [2024-06-21 17:07:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:04,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:04,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793603176] [2024-06-21 17:07:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793603176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:04,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:04,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:04,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067115323] [2024-06-21 17:07:04,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:04,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:04,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:04,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 182 transitions, 1695 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:04,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:04,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:04,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:04,529 INFO L124 PetriNetUnfolderBase]: 511/956 cut-off events. [2024-06-21 17:07:04,530 INFO L125 PetriNetUnfolderBase]: For 57456/57460 co-relation queries the response was YES. [2024-06-21 17:07:04,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5013 conditions, 956 events. 511/956 cut-off events. For 57456/57460 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4981 event pairs, 86 based on Foata normal form. 3/958 useless extension candidates. Maximal degree in co-relation 4892. Up to 559 conditions per place. [2024-06-21 17:07:04,537 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 88 changer transitions 0/198 dead transitions. [2024-06-21 17:07:04,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 198 transitions, 2155 flow [2024-06-21 17:07:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 17:07:04,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 17:07:04,538 INFO L175 Difference]: Start difference. First operand has 245 places, 182 transitions, 1695 flow. Second operand 10 states and 114 transitions. [2024-06-21 17:07:04,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 198 transitions, 2155 flow [2024-06-21 17:07:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 198 transitions, 1977 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:04,687 INFO L231 Difference]: Finished difference. Result has 247 places, 183 transitions, 1727 flow [2024-06-21 17:07:04,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1727, PETRI_PLACES=247, PETRI_TRANSITIONS=183} [2024-06-21 17:07:04,687 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 17:07:04,687 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 183 transitions, 1727 flow [2024-06-21 17:07:04,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:04,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:04,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:04,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:07:04,688 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:04,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1659941970, now seen corresponding path program 12 times [2024-06-21 17:07:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:04,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608746999] [2024-06-21 17:07:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:04,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:05,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608746999] [2024-06-21 17:07:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608746999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:05,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:05,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:05,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460382077] [2024-06-21 17:07:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:05,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:05,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:05,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:05,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 183 transitions, 1727 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:05,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:05,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:05,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:05,738 INFO L124 PetriNetUnfolderBase]: 515/964 cut-off events. [2024-06-21 17:07:05,738 INFO L125 PetriNetUnfolderBase]: For 58882/58886 co-relation queries the response was YES. [2024-06-21 17:07:05,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5098 conditions, 964 events. 515/964 cut-off events. For 58882/58886 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5034 event pairs, 88 based on Foata normal form. 3/966 useless extension candidates. Maximal degree in co-relation 4976. Up to 567 conditions per place. [2024-06-21 17:07:05,746 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 118 selfloop transitions, 79 changer transitions 0/199 dead transitions. [2024-06-21 17:07:05,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 199 transitions, 2191 flow [2024-06-21 17:07:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 17:07:05,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 17:07:05,747 INFO L175 Difference]: Start difference. First operand has 247 places, 183 transitions, 1727 flow. Second operand 10 states and 115 transitions. [2024-06-21 17:07:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 199 transitions, 2191 flow [2024-06-21 17:07:05,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 199 transitions, 1991 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:05,918 INFO L231 Difference]: Finished difference. Result has 249 places, 184 transitions, 1721 flow [2024-06-21 17:07:05,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1721, PETRI_PLACES=249, PETRI_TRANSITIONS=184} [2024-06-21 17:07:05,919 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 17:07:05,919 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 184 transitions, 1721 flow [2024-06-21 17:07:05,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:05,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:05,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:07:05,919 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:05,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 662989786, now seen corresponding path program 13 times [2024-06-21 17:07:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359929367] [2024-06-21 17:07:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:06,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:06,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359929367] [2024-06-21 17:07:06,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359929367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:06,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:06,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028981158] [2024-06-21 17:07:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:06,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:06,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:06,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:06,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 184 transitions, 1721 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:06,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:06,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:07,058 INFO L124 PetriNetUnfolderBase]: 519/972 cut-off events. [2024-06-21 17:07:07,058 INFO L125 PetriNetUnfolderBase]: For 60298/60302 co-relation queries the response was YES. [2024-06-21 17:07:07,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5117 conditions, 972 events. 519/972 cut-off events. For 60298/60302 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5114 event pairs, 88 based on Foata normal form. 3/974 useless extension candidates. Maximal degree in co-relation 4994. Up to 553 conditions per place. [2024-06-21 17:07:07,068 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 89 changer transitions 0/200 dead transitions. [2024-06-21 17:07:07,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 200 transitions, 2187 flow [2024-06-21 17:07:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 17:07:07,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 17:07:07,069 INFO L175 Difference]: Start difference. First operand has 249 places, 184 transitions, 1721 flow. Second operand 10 states and 115 transitions. [2024-06-21 17:07:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 200 transitions, 2187 flow [2024-06-21 17:07:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 200 transitions, 2003 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:07,255 INFO L231 Difference]: Finished difference. Result has 251 places, 185 transitions, 1753 flow [2024-06-21 17:07:07,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1753, PETRI_PLACES=251, PETRI_TRANSITIONS=185} [2024-06-21 17:07:07,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 17:07:07,256 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 185 transitions, 1753 flow [2024-06-21 17:07:07,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:07,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:07,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:07:07,257 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:07,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 807239792, now seen corresponding path program 5 times [2024-06-21 17:07:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:07,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542196787] [2024-06-21 17:07:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:07,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542196787] [2024-06-21 17:07:07,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542196787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:07,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:07,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335206169] [2024-06-21 17:07:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:08,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:08,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 185 transitions, 1753 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:08,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:08,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:08,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:08,458 INFO L124 PetriNetUnfolderBase]: 541/1018 cut-off events. [2024-06-21 17:07:08,458 INFO L125 PetriNetUnfolderBase]: For 94640/94644 co-relation queries the response was YES. [2024-06-21 17:07:08,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5278 conditions, 1018 events. 541/1018 cut-off events. For 94640/94644 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5397 event pairs, 96 based on Foata normal form. 11/1028 useless extension candidates. Maximal degree in co-relation 5154. Up to 585 conditions per place. [2024-06-21 17:07:08,466 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 107 selfloop transitions, 83 changer transitions 16/208 dead transitions. [2024-06-21 17:07:08,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 208 transitions, 2255 flow [2024-06-21 17:07:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 17:07:08,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 17:07:08,467 INFO L175 Difference]: Start difference. First operand has 251 places, 185 transitions, 1753 flow. Second operand 11 states and 126 transitions. [2024-06-21 17:07:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 208 transitions, 2255 flow [2024-06-21 17:07:08,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 208 transitions, 2045 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:08,651 INFO L231 Difference]: Finished difference. Result has 254 places, 181 transitions, 1689 flow [2024-06-21 17:07:08,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1689, PETRI_PLACES=254, PETRI_TRANSITIONS=181} [2024-06-21 17:07:08,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-21 17:07:08,652 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 181 transitions, 1689 flow [2024-06-21 17:07:08,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:08,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:08,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:07:08,652 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:08,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash 659414866, now seen corresponding path program 14 times [2024-06-21 17:07:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:08,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919662201] [2024-06-21 17:07:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:08,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:09,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:09,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919662201] [2024-06-21 17:07:09,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919662201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:09,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:09,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940193535] [2024-06-21 17:07:09,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:09,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:09,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:09,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:09,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 181 transitions, 1689 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:09,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:09,652 INFO L124 PetriNetUnfolderBase]: 538/1017 cut-off events. [2024-06-21 17:07:09,653 INFO L125 PetriNetUnfolderBase]: For 105459/105463 co-relation queries the response was YES. [2024-06-21 17:07:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6155 conditions, 1017 events. 538/1017 cut-off events. For 105459/105463 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5351 event pairs, 105 based on Foata normal form. 3/1019 useless extension candidates. Maximal degree in co-relation 6030. Up to 374 conditions per place. [2024-06-21 17:07:09,661 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 92 changer transitions 0/202 dead transitions. [2024-06-21 17:07:09,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 202 transitions, 2371 flow [2024-06-21 17:07:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 17:07:09,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 17:07:09,662 INFO L175 Difference]: Start difference. First operand has 254 places, 181 transitions, 1689 flow. Second operand 10 states and 118 transitions. [2024-06-21 17:07:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 202 transitions, 2371 flow [2024-06-21 17:07:09,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 202 transitions, 2185 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:09,917 INFO L231 Difference]: Finished difference. Result has 249 places, 182 transitions, 1731 flow [2024-06-21 17:07:09,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1731, PETRI_PLACES=249, PETRI_TRANSITIONS=182} [2024-06-21 17:07:09,918 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 17:07:09,918 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 182 transitions, 1731 flow [2024-06-21 17:07:09,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:09,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:09,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:07:09,919 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:09,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1659797820, now seen corresponding path program 15 times [2024-06-21 17:07:09,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:09,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020328699] [2024-06-21 17:07:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:09,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:10,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:10,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020328699] [2024-06-21 17:07:10,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020328699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:10,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:10,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6561210] [2024-06-21 17:07:10,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:10,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:10,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 182 transitions, 1731 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:10,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:10,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:10,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:10,935 INFO L124 PetriNetUnfolderBase]: 542/1025 cut-off events. [2024-06-21 17:07:10,936 INFO L125 PetriNetUnfolderBase]: For 101332/101336 co-relation queries the response was YES. [2024-06-21 17:07:10,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6207 conditions, 1025 events. 542/1025 cut-off events. For 101332/101336 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5386 event pairs, 107 based on Foata normal form. 3/1027 useless extension candidates. Maximal degree in co-relation 6084. Up to 598 conditions per place. [2024-06-21 17:07:10,945 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 81 changer transitions 0/198 dead transitions. [2024-06-21 17:07:10,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 198 transitions, 2193 flow [2024-06-21 17:07:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 17:07:10,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 17:07:10,953 INFO L175 Difference]: Start difference. First operand has 249 places, 182 transitions, 1731 flow. Second operand 10 states and 116 transitions. [2024-06-21 17:07:10,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 198 transitions, 2193 flow [2024-06-21 17:07:11,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 198 transitions, 1913 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:11,225 INFO L231 Difference]: Finished difference. Result has 248 places, 183 transitions, 1651 flow [2024-06-21 17:07:11,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1651, PETRI_PLACES=248, PETRI_TRANSITIONS=183} [2024-06-21 17:07:11,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 17:07:11,226 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 183 transitions, 1651 flow [2024-06-21 17:07:11,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:11,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:11,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:11,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:07:11,226 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:11,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1665519676, now seen corresponding path program 6 times [2024-06-21 17:07:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:11,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711252085] [2024-06-21 17:07:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:11,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:11,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711252085] [2024-06-21 17:07:11,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711252085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:11,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:11,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798633301] [2024-06-21 17:07:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:11,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:11,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:11,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 183 transitions, 1651 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:11,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:11,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:11,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:12,300 INFO L124 PetriNetUnfolderBase]: 561/1066 cut-off events. [2024-06-21 17:07:12,300 INFO L125 PetriNetUnfolderBase]: For 136074/136078 co-relation queries the response was YES. [2024-06-21 17:07:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6106 conditions, 1066 events. 561/1066 cut-off events. For 136074/136078 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5670 event pairs, 111 based on Foata normal form. 11/1076 useless extension candidates. Maximal degree in co-relation 5986. Up to 648 conditions per place. [2024-06-21 17:07:12,309 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 73 changer transitions 16/206 dead transitions. [2024-06-21 17:07:12,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 206 transitions, 2149 flow [2024-06-21 17:07:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 17:07:12,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 17:07:12,310 INFO L175 Difference]: Start difference. First operand has 248 places, 183 transitions, 1651 flow. Second operand 11 states and 127 transitions. [2024-06-21 17:07:12,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 206 transitions, 2149 flow [2024-06-21 17:07:12,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 206 transitions, 1965 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:12,561 INFO L231 Difference]: Finished difference. Result has 251 places, 179 transitions, 1594 flow [2024-06-21 17:07:12,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1594, PETRI_PLACES=251, PETRI_TRANSITIONS=179} [2024-06-21 17:07:12,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 17:07:12,561 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 179 transitions, 1594 flow [2024-06-21 17:07:12,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:12,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:12,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:12,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:07:12,562 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:12,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2105999718, now seen corresponding path program 16 times [2024-06-21 17:07:12,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:12,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022727116] [2024-06-21 17:07:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:12,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:13,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022727116] [2024-06-21 17:07:13,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022727116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:13,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:13,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:13,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732874631] [2024-06-21 17:07:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:13,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:13,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:13,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:13,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 179 transitions, 1594 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:13,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:13,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:13,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:13,697 INFO L124 PetriNetUnfolderBase]: 529/1006 cut-off events. [2024-06-21 17:07:13,697 INFO L125 PetriNetUnfolderBase]: For 105025/105029 co-relation queries the response was YES. [2024-06-21 17:07:13,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5893 conditions, 1006 events. 529/1006 cut-off events. For 105025/105029 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5275 event pairs, 107 based on Foata normal form. 3/1008 useless extension candidates. Maximal degree in co-relation 5772. Up to 650 conditions per place. [2024-06-21 17:07:13,705 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 110 selfloop transitions, 83 changer transitions 0/195 dead transitions. [2024-06-21 17:07:13,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 195 transitions, 2047 flow [2024-06-21 17:07:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 17:07:13,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 17:07:13,706 INFO L175 Difference]: Start difference. First operand has 251 places, 179 transitions, 1594 flow. Second operand 10 states and 118 transitions. [2024-06-21 17:07:13,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 195 transitions, 2047 flow [2024-06-21 17:07:13,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 195 transitions, 1887 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:13,943 INFO L231 Difference]: Finished difference. Result has 246 places, 180 transitions, 1631 flow [2024-06-21 17:07:13,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1631, PETRI_PLACES=246, PETRI_TRANSITIONS=180} [2024-06-21 17:07:13,944 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-21 17:07:13,944 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 180 transitions, 1631 flow [2024-06-21 17:07:13,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:13,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:13,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:13,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:07:13,944 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:13,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1569388418, now seen corresponding path program 17 times [2024-06-21 17:07:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:13,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85312640] [2024-06-21 17:07:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:13,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:14,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:14,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85312640] [2024-06-21 17:07:14,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85312640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:14,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517579585] [2024-06-21 17:07:14,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:14,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:14,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:14,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:14,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:14,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:14,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 180 transitions, 1631 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:14,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:14,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:14,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:15,036 INFO L124 PetriNetUnfolderBase]: 533/1014 cut-off events. [2024-06-21 17:07:15,036 INFO L125 PetriNetUnfolderBase]: For 100661/100665 co-relation queries the response was YES. [2024-06-21 17:07:15,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5927 conditions, 1014 events. 533/1014 cut-off events. For 100661/100665 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5333 event pairs, 107 based on Foata normal form. 3/1016 useless extension candidates. Maximal degree in co-relation 5808. Up to 644 conditions per place. [2024-06-21 17:07:15,044 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 110 selfloop transitions, 84 changer transitions 0/196 dead transitions. [2024-06-21 17:07:15,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 196 transitions, 2082 flow [2024-06-21 17:07:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 17:07:15,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 17:07:15,045 INFO L175 Difference]: Start difference. First operand has 246 places, 180 transitions, 1631 flow. Second operand 10 states and 119 transitions. [2024-06-21 17:07:15,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 196 transitions, 2082 flow [2024-06-21 17:07:15,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 196 transitions, 1900 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:15,275 INFO L231 Difference]: Finished difference. Result has 248 places, 181 transitions, 1646 flow [2024-06-21 17:07:15,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1646, PETRI_PLACES=248, PETRI_TRANSITIONS=181} [2024-06-21 17:07:15,275 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 17:07:15,275 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 181 transitions, 1646 flow [2024-06-21 17:07:15,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:15,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:15,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:15,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:07:15,276 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:15,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash 222477406, now seen corresponding path program 18 times [2024-06-21 17:07:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391236356] [2024-06-21 17:07:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:15,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391236356] [2024-06-21 17:07:15,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391236356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:15,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:15,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:15,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682512394] [2024-06-21 17:07:15,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:15,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:15,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:16,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:16,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 181 transitions, 1646 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:16,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:16,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:16,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:16,366 INFO L124 PetriNetUnfolderBase]: 537/1022 cut-off events. [2024-06-21 17:07:16,367 INFO L125 PetriNetUnfolderBase]: For 103088/103092 co-relation queries the response was YES. [2024-06-21 17:07:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 1022 events. 537/1022 cut-off events. For 103088/103092 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5376 event pairs, 109 based on Foata normal form. 3/1024 useless extension candidates. Maximal degree in co-relation 5870. Up to 510 conditions per place. [2024-06-21 17:07:16,374 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 87 changer transitions 0/202 dead transitions. [2024-06-21 17:07:16,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 202 transitions, 2319 flow [2024-06-21 17:07:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 17:07:16,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:07:16,375 INFO L175 Difference]: Start difference. First operand has 248 places, 181 transitions, 1646 flow. Second operand 10 states and 124 transitions. [2024-06-21 17:07:16,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 202 transitions, 2319 flow [2024-06-21 17:07:16,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 202 transitions, 2133 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:16,609 INFO L231 Difference]: Finished difference. Result has 250 places, 182 transitions, 1663 flow [2024-06-21 17:07:16,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1663, PETRI_PLACES=250, PETRI_TRANSITIONS=182} [2024-06-21 17:07:16,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 17:07:16,609 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 182 transitions, 1663 flow [2024-06-21 17:07:16,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:16,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:16,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:16,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:07:16,610 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:16,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 228199262, now seen corresponding path program 7 times [2024-06-21 17:07:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858064469] [2024-06-21 17:07:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858064469] [2024-06-21 17:07:17,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858064469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:17,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:17,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:17,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903447684] [2024-06-21 17:07:17,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:17,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:17,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:17,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 182 transitions, 1663 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:17,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:17,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:17,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:17,646 INFO L124 PetriNetUnfolderBase]: 553/1058 cut-off events. [2024-06-21 17:07:17,646 INFO L125 PetriNetUnfolderBase]: For 139404/139408 co-relation queries the response was YES. [2024-06-21 17:07:17,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6099 conditions, 1058 events. 553/1058 cut-off events. For 139404/139408 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5643 event pairs, 117 based on Foata normal form. 11/1068 useless extension candidates. Maximal degree in co-relation 5978. Up to 722 conditions per place. [2024-06-21 17:07:17,655 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 131 selfloop transitions, 58 changer transitions 10/201 dead transitions. [2024-06-21 17:07:17,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 201 transitions, 2127 flow [2024-06-21 17:07:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 17:07:17,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 17:07:17,656 INFO L175 Difference]: Start difference. First operand has 250 places, 182 transitions, 1663 flow. Second operand 10 states and 119 transitions. [2024-06-21 17:07:17,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 201 transitions, 2127 flow [2024-06-21 17:07:17,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 201 transitions, 1919 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:17,901 INFO L231 Difference]: Finished difference. Result has 252 places, 177 transitions, 1536 flow [2024-06-21 17:07:17,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1536, PETRI_PLACES=252, PETRI_TRANSITIONS=177} [2024-06-21 17:07:17,901 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 17:07:17,902 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 177 transitions, 1536 flow [2024-06-21 17:07:17,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:17,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:17,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:17,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:07:17,902 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:17,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1362729398, now seen corresponding path program 19 times [2024-06-21 17:07:17,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:17,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435698593] [2024-06-21 17:07:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:17,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:18,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435698593] [2024-06-21 17:07:18,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435698593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:18,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:18,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:18,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548979909] [2024-06-21 17:07:18,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:18,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:18,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:18,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:18,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 177 transitions, 1536 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:18,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:18,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:18,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:18,971 INFO L124 PetriNetUnfolderBase]: 539/1044 cut-off events. [2024-06-21 17:07:18,972 INFO L125 PetriNetUnfolderBase]: For 150735/150739 co-relation queries the response was YES. [2024-06-21 17:07:18,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5946 conditions, 1044 events. 539/1044 cut-off events. For 150735/150739 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5608 event pairs, 119 based on Foata normal form. 13/1056 useless extension candidates. Maximal degree in co-relation 5824. Up to 662 conditions per place. [2024-06-21 17:07:18,980 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 121 selfloop transitions, 67 changer transitions 7/197 dead transitions. [2024-06-21 17:07:18,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 197 transitions, 2017 flow [2024-06-21 17:07:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 17:07:18,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 17:07:18,981 INFO L175 Difference]: Start difference. First operand has 252 places, 177 transitions, 1536 flow. Second operand 10 states and 121 transitions. [2024-06-21 17:07:18,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 197 transitions, 2017 flow [2024-06-21 17:07:19,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 197 transitions, 1891 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:19,288 INFO L231 Difference]: Finished difference. Result has 250 places, 175 transitions, 1555 flow [2024-06-21 17:07:19,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=250, PETRI_TRANSITIONS=175} [2024-06-21 17:07:19,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 17:07:19,289 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 175 transitions, 1555 flow [2024-06-21 17:07:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:19,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:19,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:19,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:07:19,289 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:19,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:19,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1362452692, now seen corresponding path program 8 times [2024-06-21 17:07:19,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:19,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120480852] [2024-06-21 17:07:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:19,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:19,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120480852] [2024-06-21 17:07:19,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120480852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:19,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:19,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720111389] [2024-06-21 17:07:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:19,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:19,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:19,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:19,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 175 transitions, 1555 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:19,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:19,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:19,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:20,207 INFO L124 PetriNetUnfolderBase]: 549/1070 cut-off events. [2024-06-21 17:07:20,208 INFO L125 PetriNetUnfolderBase]: For 168871/168875 co-relation queries the response was YES. [2024-06-21 17:07:20,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6821 conditions, 1070 events. 549/1070 cut-off events. For 168871/168875 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5800 event pairs, 129 based on Foata normal form. 9/1078 useless extension candidates. Maximal degree in co-relation 6700. Up to 636 conditions per place. [2024-06-21 17:07:20,216 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 123 selfloop transitions, 64 changer transitions 8/197 dead transitions. [2024-06-21 17:07:20,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 197 transitions, 2228 flow [2024-06-21 17:07:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 17:07:20,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 17:07:20,217 INFO L175 Difference]: Start difference. First operand has 250 places, 175 transitions, 1555 flow. Second operand 10 states and 122 transitions. [2024-06-21 17:07:20,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 197 transitions, 2228 flow [2024-06-21 17:07:20,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 197 transitions, 2067 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 17:07:20,550 INFO L231 Difference]: Finished difference. Result has 251 places, 172 transitions, 1505 flow [2024-06-21 17:07:20,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1505, PETRI_PLACES=251, PETRI_TRANSITIONS=172} [2024-06-21 17:07:20,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 17:07:20,551 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 172 transitions, 1505 flow [2024-06-21 17:07:20,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:20,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:20,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:07:20,552 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 569286218, now seen corresponding path program 20 times [2024-06-21 17:07:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:20,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80379839] [2024-06-21 17:07:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80379839] [2024-06-21 17:07:21,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80379839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:21,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:21,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498963634] [2024-06-21 17:07:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:21,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:21,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:21,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 172 transitions, 1505 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:21,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:21,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:21,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:21,728 INFO L124 PetriNetUnfolderBase]: 550/1073 cut-off events. [2024-06-21 17:07:21,728 INFO L125 PetriNetUnfolderBase]: For 190385/190389 co-relation queries the response was YES. [2024-06-21 17:07:21,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6838 conditions, 1073 events. 550/1073 cut-off events. For 190385/190389 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5810 event pairs, 129 based on Foata normal form. 13/1085 useless extension candidates. Maximal degree in co-relation 6716. Up to 700 conditions per place. [2024-06-21 17:07:21,741 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 112 selfloop transitions, 72 changer transitions 8/194 dead transitions. [2024-06-21 17:07:21,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 194 transitions, 1988 flow [2024-06-21 17:07:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 17:07:21,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 17:07:21,741 INFO L175 Difference]: Start difference. First operand has 251 places, 172 transitions, 1505 flow. Second operand 11 states and 132 transitions. [2024-06-21 17:07:21,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 194 transitions, 1988 flow [2024-06-21 17:07:22,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 194 transitions, 1857 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:22,168 INFO L231 Difference]: Finished difference. Result has 249 places, 169 transitions, 1523 flow [2024-06-21 17:07:22,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1523, PETRI_PLACES=249, PETRI_TRANSITIONS=169} [2024-06-21 17:07:22,168 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 17:07:22,168 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 169 transitions, 1523 flow [2024-06-21 17:07:22,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:22,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:22,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:22,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:07:22,169 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:22,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:22,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1370081048, now seen corresponding path program 21 times [2024-06-21 17:07:22,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:22,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731265408] [2024-06-21 17:07:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731265408] [2024-06-21 17:07:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731265408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:22,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:22,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:07:22,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441599199] [2024-06-21 17:07:22,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:22,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:07:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:07:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:07:22,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:22,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 169 transitions, 1523 flow. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:22,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:22,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:22,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:23,193 INFO L124 PetriNetUnfolderBase]: 521/1018 cut-off events. [2024-06-21 17:07:23,194 INFO L125 PetriNetUnfolderBase]: For 131239/131243 co-relation queries the response was YES. [2024-06-21 17:07:23,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6436 conditions, 1018 events. 521/1018 cut-off events. For 131239/131243 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5458 event pairs, 130 based on Foata normal form. 3/1020 useless extension candidates. Maximal degree in co-relation 6316. Up to 695 conditions per place. [2024-06-21 17:07:23,206 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 120 selfloop transitions, 63 changer transitions 0/185 dead transitions. [2024-06-21 17:07:23,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 185 transitions, 1960 flow [2024-06-21 17:07:23,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 17:07:23,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 17:07:23,207 INFO L175 Difference]: Start difference. First operand has 249 places, 169 transitions, 1523 flow. Second operand 10 states and 114 transitions. [2024-06-21 17:07:23,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 185 transitions, 1960 flow [2024-06-21 17:07:23,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 185 transitions, 1790 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:23,510 INFO L231 Difference]: Finished difference. Result has 249 places, 170 transitions, 1514 flow [2024-06-21 17:07:23,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1514, PETRI_PLACES=249, PETRI_TRANSITIONS=170} [2024-06-21 17:07:23,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2024-06-21 17:07:23,510 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 170 transitions, 1514 flow [2024-06-21 17:07:23,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:23,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:23,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:23,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:07:23,511 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:23,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1989671368, now seen corresponding path program 22 times [2024-06-21 17:07:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:23,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529765460] [2024-06-21 17:07:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:24,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:24,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529765460] [2024-06-21 17:07:24,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529765460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:24,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:24,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:24,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008411927] [2024-06-21 17:07:24,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:24,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:24,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:24,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:24,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:24,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 170 transitions, 1514 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:24,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:24,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:24,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:24,479 INFO L124 PetriNetUnfolderBase]: 525/1026 cut-off events. [2024-06-21 17:07:24,480 INFO L125 PetriNetUnfolderBase]: For 134225/134229 co-relation queries the response was YES. [2024-06-21 17:07:24,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 1026 events. 525/1026 cut-off events. For 134225/134229 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5523 event pairs, 130 based on Foata normal form. 3/1028 useless extension candidates. Maximal degree in co-relation 6348. Up to 683 conditions per place. [2024-06-21 17:07:24,488 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 119 selfloop transitions, 65 changer transitions 0/186 dead transitions. [2024-06-21 17:07:24,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 186 transitions, 1953 flow [2024-06-21 17:07:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 17:07:24,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 17:07:24,489 INFO L175 Difference]: Start difference. First operand has 249 places, 170 transitions, 1514 flow. Second operand 10 states and 115 transitions. [2024-06-21 17:07:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 186 transitions, 1953 flow [2024-06-21 17:07:24,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 186 transitions, 1803 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:24,806 INFO L231 Difference]: Finished difference. Result has 251 places, 171 transitions, 1531 flow [2024-06-21 17:07:24,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1531, PETRI_PLACES=251, PETRI_TRANSITIONS=171} [2024-06-21 17:07:24,806 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 17:07:24,806 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 171 transitions, 1531 flow [2024-06-21 17:07:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:24,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:24,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:07:24,807 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:24,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash 569562924, now seen corresponding path program 9 times [2024-06-21 17:07:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:24,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277209958] [2024-06-21 17:07:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:24,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:25,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:25,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277209958] [2024-06-21 17:07:25,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277209958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:25,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:25,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:25,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579043141] [2024-06-21 17:07:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:25,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:25,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:25,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:25,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 171 transitions, 1531 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:25,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:25,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:25,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:25,945 INFO L124 PetriNetUnfolderBase]: 566/1113 cut-off events. [2024-06-21 17:07:25,945 INFO L125 PetriNetUnfolderBase]: For 207987/207991 co-relation queries the response was YES. [2024-06-21 17:07:25,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 1113 events. 566/1113 cut-off events. For 207987/207991 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6113 event pairs, 139 based on Foata normal form. 9/1121 useless extension candidates. Maximal degree in co-relation 7540. Up to 673 conditions per place. [2024-06-21 17:07:25,958 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 66 changer transitions 11/196 dead transitions. [2024-06-21 17:07:25,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 196 transitions, 2199 flow [2024-06-21 17:07:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 17:07:25,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 17:07:25,959 INFO L175 Difference]: Start difference. First operand has 251 places, 171 transitions, 1531 flow. Second operand 11 states and 134 transitions. [2024-06-21 17:07:25,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 196 transitions, 2199 flow [2024-06-21 17:07:26,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 196 transitions, 2043 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 17:07:26,454 INFO L231 Difference]: Finished difference. Result has 254 places, 165 transitions, 1470 flow [2024-06-21 17:07:26,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1470, PETRI_PLACES=254, PETRI_TRANSITIONS=165} [2024-06-21 17:07:26,455 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-21 17:07:26,455 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 165 transitions, 1470 flow [2024-06-21 17:07:26,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:26,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:26,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:26,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:07:26,455 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:26,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash 569294154, now seen corresponding path program 10 times [2024-06-21 17:07:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562896446] [2024-06-21 17:07:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:27,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:27,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562896446] [2024-06-21 17:07:27,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562896446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:27,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:27,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:27,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851832133] [2024-06-21 17:07:27,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:27,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:27,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 165 transitions, 1470 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:27,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:27,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:27,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:27,827 INFO L124 PetriNetUnfolderBase]: 527/1036 cut-off events. [2024-06-21 17:07:27,827 INFO L125 PetriNetUnfolderBase]: For 175533/175537 co-relation queries the response was YES. [2024-06-21 17:07:27,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6467 conditions, 1036 events. 527/1036 cut-off events. For 175533/175537 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5600 event pairs, 128 based on Foata normal form. 11/1046 useless extension candidates. Maximal degree in co-relation 6344. Up to 673 conditions per place. [2024-06-21 17:07:27,843 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 105 selfloop transitions, 62 changer transitions 18/187 dead transitions. [2024-06-21 17:07:27,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 187 transitions, 1914 flow [2024-06-21 17:07:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 17:07:27,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:07:27,844 INFO L175 Difference]: Start difference. First operand has 254 places, 165 transitions, 1470 flow. Second operand 12 states and 136 transitions. [2024-06-21 17:07:27,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 187 transitions, 1914 flow [2024-06-21 17:07:28,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 187 transitions, 1775 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:28,157 INFO L231 Difference]: Finished difference. Result has 248 places, 158 transitions, 1407 flow [2024-06-21 17:07:28,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1407, PETRI_PLACES=248, PETRI_TRANSITIONS=158} [2024-06-21 17:07:28,157 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 218 predicate places. [2024-06-21 17:07:28,157 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 158 transitions, 1407 flow [2024-06-21 17:07:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:28,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:28,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:28,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:07:28,158 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:28,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 894304044, now seen corresponding path program 11 times [2024-06-21 17:07:28,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:28,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801418341] [2024-06-21 17:07:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:28,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:28,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:28,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801418341] [2024-06-21 17:07:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801418341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:28,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:28,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968478756] [2024-06-21 17:07:28,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:28,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:28,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:28,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:28,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 158 transitions, 1407 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:28,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:28,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:28,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:29,172 INFO L124 PetriNetUnfolderBase]: 526/1041 cut-off events. [2024-06-21 17:07:29,173 INFO L125 PetriNetUnfolderBase]: For 186700/186704 co-relation queries the response was YES. [2024-06-21 17:07:29,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7067 conditions, 1041 events. 526/1041 cut-off events. For 186700/186704 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5605 event pairs, 134 based on Foata normal form. 9/1049 useless extension candidates. Maximal degree in co-relation 6948. Up to 625 conditions per place. [2024-06-21 17:07:29,181 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 61 changer transitions 11/182 dead transitions. [2024-06-21 17:07:29,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 182 transitions, 2035 flow [2024-06-21 17:07:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 17:07:29,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 17:07:29,182 INFO L175 Difference]: Start difference. First operand has 248 places, 158 transitions, 1407 flow. Second operand 11 states and 128 transitions. [2024-06-21 17:07:29,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 182 transitions, 2035 flow [2024-06-21 17:07:29,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 182 transitions, 1857 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:29,528 INFO L231 Difference]: Finished difference. Result has 237 places, 154 transitions, 1335 flow [2024-06-21 17:07:29,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1335, PETRI_PLACES=237, PETRI_TRANSITIONS=154} [2024-06-21 17:07:29,528 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 17:07:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 154 transitions, 1335 flow [2024-06-21 17:07:29,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:29,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:29,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:07:29,529 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:29,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2113134814, now seen corresponding path program 23 times [2024-06-21 17:07:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306876581] [2024-06-21 17:07:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:30,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:30,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306876581] [2024-06-21 17:07:30,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306876581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:30,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:30,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:30,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310482352] [2024-06-21 17:07:30,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:30,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:30,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:30,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 154 transitions, 1335 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:30,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:30,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:30,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:30,681 INFO L124 PetriNetUnfolderBase]: 491/968 cut-off events. [2024-06-21 17:07:30,681 INFO L125 PetriNetUnfolderBase]: For 147940/147944 co-relation queries the response was YES. [2024-06-21 17:07:30,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5837 conditions, 968 events. 491/968 cut-off events. For 147940/147944 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5135 event pairs, 123 based on Foata normal form. 13/980 useless extension candidates. Maximal degree in co-relation 5722. Up to 632 conditions per place. [2024-06-21 17:07:30,689 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 105 selfloop transitions, 62 changer transitions 7/176 dead transitions. [2024-06-21 17:07:30,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 176 transitions, 1786 flow [2024-06-21 17:07:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 17:07:30,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 17:07:30,690 INFO L175 Difference]: Start difference. First operand has 237 places, 154 transitions, 1335 flow. Second operand 11 states and 129 transitions. [2024-06-21 17:07:30,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 176 transitions, 1786 flow [2024-06-21 17:07:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 176 transitions, 1660 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:30,892 INFO L231 Difference]: Finished difference. Result has 233 places, 152 transitions, 1350 flow [2024-06-21 17:07:30,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1350, PETRI_PLACES=233, PETRI_TRANSITIONS=152} [2024-06-21 17:07:30,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 17:07:30,892 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 152 transitions, 1350 flow [2024-06-21 17:07:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:30,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:30,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:07:30,893 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:30,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2113411520, now seen corresponding path program 12 times [2024-06-21 17:07:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:30,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536915066] [2024-06-21 17:07:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:31,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:31,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536915066] [2024-06-21 17:07:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536915066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:31,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:31,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049217680] [2024-06-21 17:07:31,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:31,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:31,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:31,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 152 transitions, 1350 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:31,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:31,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:31,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:31,875 INFO L124 PetriNetUnfolderBase]: 501/994 cut-off events. [2024-06-21 17:07:31,876 INFO L125 PetriNetUnfolderBase]: For 156569/156573 co-relation queries the response was YES. [2024-06-21 17:07:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6611 conditions, 994 events. 501/994 cut-off events. For 156569/156573 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5284 event pairs, 129 based on Foata normal form. 9/1002 useless extension candidates. Maximal degree in co-relation 6498. Up to 578 conditions per place. [2024-06-21 17:07:31,884 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 58 changer transitions 8/177 dead transitions. [2024-06-21 17:07:31,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 177 transitions, 1991 flow [2024-06-21 17:07:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:31,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 17:07:31,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 17:07:31,885 INFO L175 Difference]: Start difference. First operand has 233 places, 152 transitions, 1350 flow. Second operand 11 states and 129 transitions. [2024-06-21 17:07:31,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 177 transitions, 1991 flow [2024-06-21 17:07:32,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 177 transitions, 1795 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:32,122 INFO L231 Difference]: Finished difference. Result has 233 places, 149 transitions, 1255 flow [2024-06-21 17:07:32,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1255, PETRI_PLACES=233, PETRI_TRANSITIONS=149} [2024-06-21 17:07:32,123 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 17:07:32,123 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 149 transitions, 1255 flow [2024-06-21 17:07:32,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:32,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:32,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:32,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 17:07:32,123 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:32,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash 593722742, now seen corresponding path program 13 times [2024-06-21 17:07:32,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:32,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267585928] [2024-06-21 17:07:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:32,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:32,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267585928] [2024-06-21 17:07:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267585928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:32,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:32,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:32,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359021085] [2024-06-21 17:07:32,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:32,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:32,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:32,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 149 transitions, 1255 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:32,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:32,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:32,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:33,338 INFO L124 PetriNetUnfolderBase]: 498/989 cut-off events. [2024-06-21 17:07:33,338 INFO L125 PetriNetUnfolderBase]: For 166871/166875 co-relation queries the response was YES. [2024-06-21 17:07:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 989 events. 498/989 cut-off events. For 166871/166875 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5267 event pairs, 131 based on Foata normal form. 11/999 useless extension candidates. Maximal degree in co-relation 6374. Up to 658 conditions per place. [2024-06-21 17:07:33,346 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 99 selfloop transitions, 54 changer transitions 17/172 dead transitions. [2024-06-21 17:07:33,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 172 transitions, 1673 flow [2024-06-21 17:07:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 17:07:33,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 17:07:33,346 INFO L175 Difference]: Start difference. First operand has 233 places, 149 transitions, 1255 flow. Second operand 12 states and 136 transitions. [2024-06-21 17:07:33,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 172 transitions, 1673 flow [2024-06-21 17:07:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 172 transitions, 1557 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:33,624 INFO L231 Difference]: Finished difference. Result has 231 places, 142 transitions, 1206 flow [2024-06-21 17:07:33,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1206, PETRI_PLACES=231, PETRI_TRANSITIONS=142} [2024-06-21 17:07:33,624 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-21 17:07:33,625 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 142 transitions, 1206 flow [2024-06-21 17:07:33,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:33,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:33,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:33,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 17:07:33,625 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:33,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash 586363156, now seen corresponding path program 24 times [2024-06-21 17:07:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:33,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176233402] [2024-06-21 17:07:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:34,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:34,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176233402] [2024-06-21 17:07:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176233402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:34,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590791050] [2024-06-21 17:07:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:34,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:34,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:34,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:34,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 142 transitions, 1206 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:34,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:34,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:34,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:34,734 INFO L124 PetriNetUnfolderBase]: 460/915 cut-off events. [2024-06-21 17:07:34,734 INFO L125 PetriNetUnfolderBase]: For 123631/123635 co-relation queries the response was YES. [2024-06-21 17:07:34,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 915 events. 460/915 cut-off events. For 123631/123635 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4747 event pairs, 126 based on Foata normal form. 3/917 useless extension candidates. Maximal degree in co-relation 5880. Up to 647 conditions per place. [2024-06-21 17:07:34,740 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 101 selfloop transitions, 57 changer transitions 0/160 dead transitions. [2024-06-21 17:07:34,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 160 transitions, 1603 flow [2024-06-21 17:07:34,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 17:07:34,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 17:07:34,741 INFO L175 Difference]: Start difference. First operand has 231 places, 142 transitions, 1206 flow. Second operand 11 states and 121 transitions. [2024-06-21 17:07:34,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 160 transitions, 1603 flow [2024-06-21 17:07:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 160 transitions, 1481 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:34,981 INFO L231 Difference]: Finished difference. Result has 222 places, 143 transitions, 1237 flow [2024-06-21 17:07:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1237, PETRI_PLACES=222, PETRI_TRANSITIONS=143} [2024-06-21 17:07:34,981 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-06-21 17:07:34,981 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 143 transitions, 1237 flow [2024-06-21 17:07:34,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:34,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:34,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:34,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 17:07:34,982 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:34,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash 313767610, now seen corresponding path program 25 times [2024-06-21 17:07:34,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:34,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695176685] [2024-06-21 17:07:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:34,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:35,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:35,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695176685] [2024-06-21 17:07:35,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695176685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:35,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:35,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322111567] [2024-06-21 17:07:35,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:35,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:35,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 143 transitions, 1237 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:35,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:35,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:35,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:36,125 INFO L124 PetriNetUnfolderBase]: 457/910 cut-off events. [2024-06-21 17:07:36,125 INFO L125 PetriNetUnfolderBase]: For 106298/106302 co-relation queries the response was YES. [2024-06-21 17:07:36,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 910 events. 457/910 cut-off events. For 106298/106302 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4731 event pairs, 125 based on Foata normal form. 3/912 useless extension candidates. Maximal degree in co-relation 5560. Up to 628 conditions per place. [2024-06-21 17:07:36,132 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 100 selfloop transitions, 58 changer transitions 0/160 dead transitions. [2024-06-21 17:07:36,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 160 transitions, 1599 flow [2024-06-21 17:07:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 17:07:36,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 17:07:36,132 INFO L175 Difference]: Start difference. First operand has 222 places, 143 transitions, 1237 flow. Second operand 11 states and 122 transitions. [2024-06-21 17:07:36,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 160 transitions, 1599 flow [2024-06-21 17:07:36,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 160 transitions, 1441 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 17:07:36,372 INFO L231 Difference]: Finished difference. Result has 224 places, 143 transitions, 1199 flow [2024-06-21 17:07:36,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1199, PETRI_PLACES=224, PETRI_TRANSITIONS=143} [2024-06-21 17:07:36,372 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 17:07:36,372 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 143 transitions, 1199 flow [2024-06-21 17:07:36,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:36,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:36,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:36,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 17:07:36,373 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:36,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash 313982936, now seen corresponding path program 14 times [2024-06-21 17:07:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:36,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617786763] [2024-06-21 17:07:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:36,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617786763] [2024-06-21 17:07:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617786763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:37,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:37,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:37,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699534243] [2024-06-21 17:07:37,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:37,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:37,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:37,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:37,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:37,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 143 transitions, 1199 flow. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:37,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:37,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:37,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:37,440 INFO L124 PetriNetUnfolderBase]: 444/887 cut-off events. [2024-06-21 17:07:37,441 INFO L125 PetriNetUnfolderBase]: For 101374/101378 co-relation queries the response was YES. [2024-06-21 17:07:37,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4734 conditions, 887 events. 444/887 cut-off events. For 101374/101378 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4606 event pairs, 116 based on Foata normal form. 11/897 useless extension candidates. Maximal degree in co-relation 4626. Up to 573 conditions per place. [2024-06-21 17:07:37,447 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 95 selfloop transitions, 51 changer transitions 16/164 dead transitions. [2024-06-21 17:07:37,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 164 transitions, 1593 flow [2024-06-21 17:07:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:07:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:07:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 17:07:37,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 17:07:37,447 INFO L175 Difference]: Start difference. First operand has 224 places, 143 transitions, 1199 flow. Second operand 12 states and 130 transitions. [2024-06-21 17:07:37,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 164 transitions, 1593 flow [2024-06-21 17:07:37,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 164 transitions, 1401 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:37,622 INFO L231 Difference]: Finished difference. Result has 224 places, 137 transitions, 1081 flow [2024-06-21 17:07:37,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1081, PETRI_PLACES=224, PETRI_TRANSITIONS=137} [2024-06-21 17:07:37,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 17:07:37,623 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 137 transitions, 1081 flow [2024-06-21 17:07:37,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:37,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:37,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 17:07:37,623 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:37,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1856168341, now seen corresponding path program 1 times [2024-06-21 17:07:37,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:37,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401380396] [2024-06-21 17:07:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:37,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:38,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:38,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401380396] [2024-06-21 17:07:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401380396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:38,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667788219] [2024-06-21 17:07:38,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:38,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:38,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:38,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:38,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 137 transitions, 1081 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:38,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:38,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:38,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:38,732 INFO L124 PetriNetUnfolderBase]: 416/839 cut-off events. [2024-06-21 17:07:38,732 INFO L125 PetriNetUnfolderBase]: For 88130/88134 co-relation queries the response was YES. [2024-06-21 17:07:38,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4420 conditions, 839 events. 416/839 cut-off events. For 88130/88134 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4332 event pairs, 102 based on Foata normal form. 10/848 useless extension candidates. Maximal degree in co-relation 4312. Up to 676 conditions per place. [2024-06-21 17:07:38,738 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 115 selfloop transitions, 11 changer transitions 29/157 dead transitions. [2024-06-21 17:07:38,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 157 transitions, 1439 flow [2024-06-21 17:07:38,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-21 17:07:38,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31671554252199413 [2024-06-21 17:07:38,739 INFO L175 Difference]: Start difference. First operand has 224 places, 137 transitions, 1081 flow. Second operand 11 states and 108 transitions. [2024-06-21 17:07:38,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 157 transitions, 1439 flow [2024-06-21 17:07:38,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 157 transitions, 1329 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:38,887 INFO L231 Difference]: Finished difference. Result has 216 places, 124 transitions, 888 flow [2024-06-21 17:07:38,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=888, PETRI_PLACES=216, PETRI_TRANSITIONS=124} [2024-06-21 17:07:38,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-21 17:07:38,888 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 124 transitions, 888 flow [2024-06-21 17:07:38,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:38,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:38,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:38,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 17:07:38,888 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:38,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash 527512341, now seen corresponding path program 2 times [2024-06-21 17:07:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:38,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925569658] [2024-06-21 17:07:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:38,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:39,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:39,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925569658] [2024-06-21 17:07:39,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925569658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:39,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:39,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385900099] [2024-06-21 17:07:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:39,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:39,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:39,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 124 transitions, 888 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:39,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:39,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:39,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:39,994 INFO L124 PetriNetUnfolderBase]: 368/747 cut-off events. [2024-06-21 17:07:39,994 INFO L125 PetriNetUnfolderBase]: For 81608/81612 co-relation queries the response was YES. [2024-06-21 17:07:39,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 747 events. 368/747 cut-off events. For 81608/81612 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3723 event pairs, 96 based on Foata normal form. 10/756 useless extension candidates. Maximal degree in co-relation 3842. Up to 612 conditions per place. [2024-06-21 17:07:39,999 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 107 selfloop transitions, 21 changer transitions 12/142 dead transitions. [2024-06-21 17:07:39,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 142 transitions, 1216 flow [2024-06-21 17:07:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 17:07:40,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 17:07:40,000 INFO L175 Difference]: Start difference. First operand has 216 places, 124 transitions, 888 flow. Second operand 11 states and 109 transitions. [2024-06-21 17:07:40,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 142 transitions, 1216 flow [2024-06-21 17:07:40,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 142 transitions, 1164 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:40,120 INFO L231 Difference]: Finished difference. Result has 199 places, 119 transitions, 846 flow [2024-06-21 17:07:40,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=846, PETRI_PLACES=199, PETRI_TRANSITIONS=119} [2024-06-21 17:07:40,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 17:07:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 119 transitions, 846 flow [2024-06-21 17:07:40,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:40,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:40,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:40,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 17:07:40,121 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:40,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash -315436477, now seen corresponding path program 3 times [2024-06-21 17:07:40,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833485014] [2024-06-21 17:07:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:40,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833485014] [2024-06-21 17:07:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833485014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:40,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:40,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376069284] [2024-06-21 17:07:40,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:40,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:41,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:41,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 119 transitions, 846 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:41,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:41,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:41,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:41,388 INFO L124 PetriNetUnfolderBase]: 352/719 cut-off events. [2024-06-21 17:07:41,388 INFO L125 PetriNetUnfolderBase]: For 71602/71606 co-relation queries the response was YES. [2024-06-21 17:07:41,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3750 conditions, 719 events. 352/719 cut-off events. For 71602/71606 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3562 event pairs, 92 based on Foata normal form. 10/728 useless extension candidates. Maximal degree in co-relation 3663. Up to 584 conditions per place. [2024-06-21 17:07:41,393 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 103 selfloop transitions, 17 changer transitions 15/137 dead transitions. [2024-06-21 17:07:41,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 137 transitions, 1162 flow [2024-06-21 17:07:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 17:07:41,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 17:07:41,394 INFO L175 Difference]: Start difference. First operand has 199 places, 119 transitions, 846 flow. Second operand 11 states and 109 transitions. [2024-06-21 17:07:41,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 137 transitions, 1162 flow [2024-06-21 17:07:41,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 137 transitions, 1112 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:41,505 INFO L231 Difference]: Finished difference. Result has 194 places, 113 transitions, 792 flow [2024-06-21 17:07:41,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=792, PETRI_PLACES=194, PETRI_TRANSITIONS=113} [2024-06-21 17:07:41,505 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-21 17:07:41,505 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 113 transitions, 792 flow [2024-06-21 17:07:41,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:41,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:41,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:41,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 17:07:41,506 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:41,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -426258997, now seen corresponding path program 4 times [2024-06-21 17:07:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:41,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666960183] [2024-06-21 17:07:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:42,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:42,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666960183] [2024-06-21 17:07:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666960183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:42,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:42,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:42,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513742712] [2024-06-21 17:07:42,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:42,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:42,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:42,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:42,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 113 transitions, 792 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:42,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:42,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:42,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:42,692 INFO L124 PetriNetUnfolderBase]: 332/683 cut-off events. [2024-06-21 17:07:42,692 INFO L125 PetriNetUnfolderBase]: For 67537/67541 co-relation queries the response was YES. [2024-06-21 17:07:42,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3578 conditions, 683 events. 332/683 cut-off events. For 67537/67541 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3322 event pairs, 82 based on Foata normal form. 10/692 useless extension candidates. Maximal degree in co-relation 3493. Up to 548 conditions per place. [2024-06-21 17:07:42,697 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 98 selfloop transitions, 12 changer transitions 19/131 dead transitions. [2024-06-21 17:07:42,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 131 transitions, 1094 flow [2024-06-21 17:07:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 17:07:42,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3196480938416422 [2024-06-21 17:07:42,698 INFO L175 Difference]: Start difference. First operand has 194 places, 113 transitions, 792 flow. Second operand 11 states and 109 transitions. [2024-06-21 17:07:42,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 131 transitions, 1094 flow [2024-06-21 17:07:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 131 transitions, 1046 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:42,798 INFO L231 Difference]: Finished difference. Result has 185 places, 105 transitions, 713 flow [2024-06-21 17:07:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=713, PETRI_PLACES=185, PETRI_TRANSITIONS=105} [2024-06-21 17:07:42,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 17:07:42,799 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 105 transitions, 713 flow [2024-06-21 17:07:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:42,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:42,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 17:07:42,801 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:42,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash -310788089, now seen corresponding path program 1 times [2024-06-21 17:07:42,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:42,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313340689] [2024-06-21 17:07:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:42,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:43,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:43,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313340689] [2024-06-21 17:07:43,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313340689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:43,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:43,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571826936] [2024-06-21 17:07:43,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:43,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:43,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:43,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 105 transitions, 713 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:43,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:43,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:43,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:43,934 INFO L124 PetriNetUnfolderBase]: 305/634 cut-off events. [2024-06-21 17:07:43,934 INFO L125 PetriNetUnfolderBase]: For 60330/60333 co-relation queries the response was YES. [2024-06-21 17:07:43,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 634 events. 305/634 cut-off events. For 60330/60333 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3046 event pairs, 89 based on Foata normal form. 11/644 useless extension candidates. Maximal degree in co-relation 3099. Up to 528 conditions per place. [2024-06-21 17:07:43,938 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 95 selfloop transitions, 14 changer transitions 7/118 dead transitions. [2024-06-21 17:07:43,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 118 transitions, 977 flow [2024-06-21 17:07:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-21 17:07:43,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-06-21 17:07:43,940 INFO L175 Difference]: Start difference. First operand has 185 places, 105 transitions, 713 flow. Second operand 11 states and 103 transitions. [2024-06-21 17:07:43,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 118 transitions, 977 flow [2024-06-21 17:07:44,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 118 transitions, 941 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:44,029 INFO L231 Difference]: Finished difference. Result has 176 places, 101 transitions, 684 flow [2024-06-21 17:07:44,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=684, PETRI_PLACES=176, PETRI_TRANSITIONS=101} [2024-06-21 17:07:44,029 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-21 17:07:44,029 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 101 transitions, 684 flow [2024-06-21 17:07:44,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:44,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:44,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:44,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 17:07:44,030 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:44,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash -310794847, now seen corresponding path program 5 times [2024-06-21 17:07:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420800995] [2024-06-21 17:07:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:44,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420800995] [2024-06-21 17:07:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420800995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:44,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:44,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167767324] [2024-06-21 17:07:44,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:44,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:44,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 101 transitions, 684 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:44,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:44,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:44,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:45,177 INFO L124 PetriNetUnfolderBase]: 296/619 cut-off events. [2024-06-21 17:07:45,177 INFO L125 PetriNetUnfolderBase]: For 49229/49232 co-relation queries the response was YES. [2024-06-21 17:07:45,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 619 events. 296/619 cut-off events. For 49229/49232 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2950 event pairs, 87 based on Foata normal form. 9/627 useless extension candidates. Maximal degree in co-relation 2975. Up to 524 conditions per place. [2024-06-21 17:07:45,181 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 5 changer transitions 24/115 dead transitions. [2024-06-21 17:07:45,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 115 transitions, 944 flow [2024-06-21 17:07:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2024-06-21 17:07:45,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2932551319648094 [2024-06-21 17:07:45,181 INFO L175 Difference]: Start difference. First operand has 176 places, 101 transitions, 684 flow. Second operand 11 states and 100 transitions. [2024-06-21 17:07:45,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 115 transitions, 944 flow [2024-06-21 17:07:45,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 115 transitions, 888 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:45,242 INFO L231 Difference]: Finished difference. Result has 172 places, 90 transitions, 571 flow [2024-06-21 17:07:45,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=571, PETRI_PLACES=172, PETRI_TRANSITIONS=90} [2024-06-21 17:07:45,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 17:07:45,242 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 90 transitions, 571 flow [2024-06-21 17:07:45,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:45,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:45,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:45,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 17:07:45,243 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:45,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:45,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1721506317, now seen corresponding path program 6 times [2024-06-21 17:07:45,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:45,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322181427] [2024-06-21 17:07:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:45,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:45,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322181427] [2024-06-21 17:07:45,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322181427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:45,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948803450] [2024-06-21 17:07:45,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:45,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:46,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:46,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 90 transitions, 571 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:46,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:46,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:46,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:46,234 INFO L124 PetriNetUnfolderBase]: 257/532 cut-off events. [2024-06-21 17:07:46,234 INFO L125 PetriNetUnfolderBase]: For 34658/34658 co-relation queries the response was YES. [2024-06-21 17:07:46,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 532 events. 257/532 cut-off events. For 34658/34658 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2447 event pairs, 65 based on Foata normal form. 6/537 useless extension candidates. Maximal degree in co-relation 2222. Up to 327 conditions per place. [2024-06-21 17:07:46,237 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 61 selfloop transitions, 29 changer transitions 12/104 dead transitions. [2024-06-21 17:07:46,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 104 transitions, 811 flow [2024-06-21 17:07:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-06-21 17:07:46,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-21 17:07:46,238 INFO L175 Difference]: Start difference. First operand has 172 places, 90 transitions, 571 flow. Second operand 10 states and 100 transitions. [2024-06-21 17:07:46,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 104 transitions, 811 flow [2024-06-21 17:07:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 104 transitions, 774 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-21 17:07:46,276 INFO L231 Difference]: Finished difference. Result has 154 places, 86 transitions, 580 flow [2024-06-21 17:07:46,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=580, PETRI_PLACES=154, PETRI_TRANSITIONS=86} [2024-06-21 17:07:46,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-21 17:07:46,277 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 86 transitions, 580 flow [2024-06-21 17:07:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:46,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:46,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 17:07:46,277 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:46,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1801983031, now seen corresponding path program 7 times [2024-06-21 17:07:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:46,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848717386] [2024-06-21 17:07:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848717386] [2024-06-21 17:07:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848717386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570027353] [2024-06-21 17:07:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:47,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:47,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 86 transitions, 580 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:47,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:47,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:47,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:47,291 INFO L124 PetriNetUnfolderBase]: 247/510 cut-off events. [2024-06-21 17:07:47,292 INFO L125 PetriNetUnfolderBase]: For 28347/28347 co-relation queries the response was YES. [2024-06-21 17:07:47,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2177 conditions, 510 events. 247/510 cut-off events. For 28347/28347 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2309 event pairs, 59 based on Foata normal form. 6/515 useless extension candidates. Maximal degree in co-relation 2112. Up to 273 conditions per place. [2024-06-21 17:07:47,294 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 24 changer transitions 21/100 dead transitions. [2024-06-21 17:07:47,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 100 transitions, 806 flow [2024-06-21 17:07:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-21 17:07:47,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3161290322580645 [2024-06-21 17:07:47,295 INFO L175 Difference]: Start difference. First operand has 154 places, 86 transitions, 580 flow. Second operand 10 states and 98 transitions. [2024-06-21 17:07:47,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 100 transitions, 806 flow [2024-06-21 17:07:47,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 100 transitions, 740 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:47,329 INFO L231 Difference]: Finished difference. Result has 147 places, 74 transitions, 509 flow [2024-06-21 17:07:47,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=509, PETRI_PLACES=147, PETRI_TRANSITIONS=74} [2024-06-21 17:07:47,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 17:07:47,330 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 74 transitions, 509 flow [2024-06-21 17:07:47,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:47,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:47,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:47,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 17:07:47,330 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:47,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash -836417247, now seen corresponding path program 8 times [2024-06-21 17:07:47,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:47,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203987345] [2024-06-21 17:07:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:47,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:48,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:48,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203987345] [2024-06-21 17:07:48,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203987345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:48,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:48,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:48,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288502718] [2024-06-21 17:07:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:48,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:48,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:48,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:48,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:48,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:48,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 74 transitions, 509 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:48,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:48,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:48,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:48,405 INFO L124 PetriNetUnfolderBase]: 207/434 cut-off events. [2024-06-21 17:07:48,406 INFO L125 PetriNetUnfolderBase]: For 25377/25377 co-relation queries the response was YES. [2024-06-21 17:07:48,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1924 conditions, 434 events. 207/434 cut-off events. For 25377/25377 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1838 event pairs, 55 based on Foata normal form. 6/439 useless extension candidates. Maximal degree in co-relation 1862. Up to 247 conditions per place. [2024-06-21 17:07:48,407 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 49 selfloop transitions, 19 changer transitions 20/90 dead transitions. [2024-06-21 17:07:48,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 90 transitions, 719 flow [2024-06-21 17:07:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-21 17:07:48,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30498533724340177 [2024-06-21 17:07:48,408 INFO L175 Difference]: Start difference. First operand has 147 places, 74 transitions, 509 flow. Second operand 11 states and 104 transitions. [2024-06-21 17:07:48,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 90 transitions, 719 flow [2024-06-21 17:07:48,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 90 transitions, 651 flow, removed 10 selfloop flow, removed 16 redundant places. [2024-06-21 17:07:48,433 INFO L231 Difference]: Finished difference. Result has 130 places, 66 transitions, 435 flow [2024-06-21 17:07:48,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=435, PETRI_PLACES=130, PETRI_TRANSITIONS=66} [2024-06-21 17:07:48,433 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-21 17:07:48,433 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 66 transitions, 435 flow [2024-06-21 17:07:48,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:48,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:48,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:48,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 17:07:48,434 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:48,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:48,434 INFO L85 PathProgramCache]: Analyzing trace with hash -922151795, now seen corresponding path program 9 times [2024-06-21 17:07:48,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:48,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145295329] [2024-06-21 17:07:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:48,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:49,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:49,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145295329] [2024-06-21 17:07:49,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145295329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:49,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761487268] [2024-06-21 17:07:49,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:49,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:49,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:49,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 66 transitions, 435 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:49,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:49,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:49,538 INFO L124 PetriNetUnfolderBase]: 185/392 cut-off events. [2024-06-21 17:07:49,538 INFO L125 PetriNetUnfolderBase]: For 17527/17527 co-relation queries the response was YES. [2024-06-21 17:07:49,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673 conditions, 392 events. 185/392 cut-off events. For 17527/17527 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1620 event pairs, 51 based on Foata normal form. 6/397 useless extension candidates. Maximal degree in co-relation 1620. Up to 221 conditions per place. [2024-06-21 17:07:49,540 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 42 selfloop transitions, 19 changer transitions 18/81 dead transitions. [2024-06-21 17:07:49,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 81 transitions, 625 flow [2024-06-21 17:07:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2024-06-21 17:07:49,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991202346041056 [2024-06-21 17:07:49,540 INFO L175 Difference]: Start difference. First operand has 130 places, 66 transitions, 435 flow. Second operand 11 states and 102 transitions. [2024-06-21 17:07:49,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 81 transitions, 625 flow [2024-06-21 17:07:49,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 81 transitions, 567 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:49,555 INFO L231 Difference]: Finished difference. Result has 121 places, 60 transitions, 387 flow [2024-06-21 17:07:49,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=387, PETRI_PLACES=121, PETRI_TRANSITIONS=60} [2024-06-21 17:07:49,555 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-21 17:07:49,555 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 60 transitions, 387 flow [2024-06-21 17:07:49,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:49,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:49,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 17:07:49,560 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:49,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1341525159, now seen corresponding path program 10 times [2024-06-21 17:07:49,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:49,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459408443] [2024-06-21 17:07:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:50,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:50,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459408443] [2024-06-21 17:07:50,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459408443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:50,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:50,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:50,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502433837] [2024-06-21 17:07:50,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:50,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:50,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:50,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:50,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 60 transitions, 387 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:50,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:50,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:50,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:50,550 INFO L124 PetriNetUnfolderBase]: 163/354 cut-off events. [2024-06-21 17:07:50,550 INFO L125 PetriNetUnfolderBase]: For 14465/14465 co-relation queries the response was YES. [2024-06-21 17:07:50,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1500 conditions, 354 events. 163/354 cut-off events. For 14465/14465 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1413 event pairs, 27 based on Foata normal form. 6/359 useless extension candidates. Maximal degree in co-relation 1451. Up to 95 conditions per place. [2024-06-21 17:07:50,552 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 17 changer transitions 23/74 dead transitions. [2024-06-21 17:07:50,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 74 transitions, 561 flow [2024-06-21 17:07:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 92 transitions. [2024-06-21 17:07:50,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2967741935483871 [2024-06-21 17:07:50,552 INFO L175 Difference]: Start difference. First operand has 121 places, 60 transitions, 387 flow. Second operand 10 states and 92 transitions. [2024-06-21 17:07:50,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 74 transitions, 561 flow [2024-06-21 17:07:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 74 transitions, 513 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:50,563 INFO L231 Difference]: Finished difference. Result has 112 places, 47 transitions, 300 flow [2024-06-21 17:07:50,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=112, PETRI_TRANSITIONS=47} [2024-06-21 17:07:50,564 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 17:07:50,564 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 47 transitions, 300 flow [2024-06-21 17:07:50,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:50,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:50,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:50,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 17:07:50,564 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:50,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1136862637, now seen corresponding path program 11 times [2024-06-21 17:07:50,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:50,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83315289] [2024-06-21 17:07:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:50,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:51,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:51,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83315289] [2024-06-21 17:07:51,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83315289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:51,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:51,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 17:07:51,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398003762] [2024-06-21 17:07:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:51,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 17:07:51,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 17:07:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 17:07:51,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:51,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 47 transitions, 300 flow. Second operand has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:51,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:51,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:51,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:51,875 INFO L124 PetriNetUnfolderBase]: 127/274 cut-off events. [2024-06-21 17:07:51,875 INFO L125 PetriNetUnfolderBase]: For 11648/11648 co-relation queries the response was YES. [2024-06-21 17:07:51,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 274 events. 127/274 cut-off events. For 11648/11648 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1025 event pairs, 40 based on Foata normal form. 6/280 useless extension candidates. Maximal degree in co-relation 1174. Up to 159 conditions per place. [2024-06-21 17:07:51,876 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 30 selfloop transitions, 12 changer transitions 18/62 dead transitions. [2024-06-21 17:07:51,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 62 transitions, 452 flow [2024-06-21 17:07:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:07:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:07:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 109 transitions. [2024-06-21 17:07:51,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2704714640198511 [2024-06-21 17:07:51,877 INFO L175 Difference]: Start difference. First operand has 112 places, 47 transitions, 300 flow. Second operand 13 states and 109 transitions. [2024-06-21 17:07:51,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 62 transitions, 452 flow [2024-06-21 17:07:51,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 62 transitions, 391 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-06-21 17:07:51,885 INFO L231 Difference]: Finished difference. Result has 95 places, 41 transitions, 238 flow [2024-06-21 17:07:51,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=238, PETRI_PLACES=95, PETRI_TRANSITIONS=41} [2024-06-21 17:07:51,885 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-21 17:07:51,885 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 41 transitions, 238 flow [2024-06-21 17:07:51,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.214285714285714) internal successors, (87), 14 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:51,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:51,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:51,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 17:07:51,885 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:51,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 705062941, now seen corresponding path program 12 times [2024-06-21 17:07:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:51,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766884634] [2024-06-21 17:07:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:52,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766884634] [2024-06-21 17:07:52,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766884634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:52,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:52,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:52,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234594684] [2024-06-21 17:07:52,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:52,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:52,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:52,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 41 transitions, 238 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:52,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:52,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:52,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:52,866 INFO L124 PetriNetUnfolderBase]: 113/244 cut-off events. [2024-06-21 17:07:52,866 INFO L125 PetriNetUnfolderBase]: For 7538/7538 co-relation queries the response was YES. [2024-06-21 17:07:52,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 244 events. 113/244 cut-off events. For 7538/7538 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 873 event pairs, 34 based on Foata normal form. 6/250 useless extension candidates. Maximal degree in co-relation 979. Up to 149 conditions per place. [2024-06-21 17:07:52,867 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 29 selfloop transitions, 13 changer transitions 12/56 dead transitions. [2024-06-21 17:07:52,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 56 transitions, 378 flow [2024-06-21 17:07:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2024-06-21 17:07:52,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-06-21 17:07:52,868 INFO L175 Difference]: Start difference. First operand has 95 places, 41 transitions, 238 flow. Second operand 11 states and 99 transitions. [2024-06-21 17:07:52,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 56 transitions, 378 flow [2024-06-21 17:07:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 56 transitions, 342 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:52,873 INFO L231 Difference]: Finished difference. Result has 83 places, 37 transitions, 211 flow [2024-06-21 17:07:52,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=211, PETRI_PLACES=83, PETRI_TRANSITIONS=37} [2024-06-21 17:07:52,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-21 17:07:52,873 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 37 transitions, 211 flow [2024-06-21 17:07:52,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:52,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:52,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:52,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 17:07:52,874 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:52,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1691117833, now seen corresponding path program 13 times [2024-06-21 17:07:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:52,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593235658] [2024-06-21 17:07:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593235658] [2024-06-21 17:07:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593235658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:53,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446011762] [2024-06-21 17:07:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:53,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:53,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 37 transitions, 211 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:53,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:53,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:53,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:54,113 INFO L124 PetriNetUnfolderBase]: 104/225 cut-off events. [2024-06-21 17:07:54,113 INFO L125 PetriNetUnfolderBase]: For 5166/5166 co-relation queries the response was YES. [2024-06-21 17:07:54,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 225 events. 104/225 cut-off events. For 5166/5166 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 769 event pairs, 36 based on Foata normal form. 6/231 useless extension candidates. Maximal degree in co-relation 874. Up to 139 conditions per place. [2024-06-21 17:07:54,114 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 27 selfloop transitions, 11 changer transitions 11/51 dead transitions. [2024-06-21 17:07:54,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 51 transitions, 339 flow [2024-06-21 17:07:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2024-06-21 17:07:54,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2844574780058651 [2024-06-21 17:07:54,114 INFO L175 Difference]: Start difference. First operand has 83 places, 37 transitions, 211 flow. Second operand 11 states and 97 transitions. [2024-06-21 17:07:54,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 51 transitions, 339 flow [2024-06-21 17:07:54,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 51 transitions, 305 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 17:07:54,118 INFO L231 Difference]: Finished difference. Result has 77 places, 34 transitions, 187 flow [2024-06-21 17:07:54,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=187, PETRI_PLACES=77, PETRI_TRANSITIONS=34} [2024-06-21 17:07:54,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-21 17:07:54,118 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 34 transitions, 187 flow [2024-06-21 17:07:54,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:54,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:54,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:54,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 17:07:54,119 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:54,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1688665037, now seen corresponding path program 14 times [2024-06-21 17:07:54,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:54,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681813333] [2024-06-21 17:07:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:55,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:55,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681813333] [2024-06-21 17:07:55,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681813333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:55,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:55,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:55,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572841809] [2024-06-21 17:07:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:55,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:55,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:55,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:55,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 34 transitions, 187 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:55,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:55,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:55,391 INFO L124 PetriNetUnfolderBase]: 94/207 cut-off events. [2024-06-21 17:07:55,391 INFO L125 PetriNetUnfolderBase]: For 3956/3956 co-relation queries the response was YES. [2024-06-21 17:07:55,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 207 events. 94/207 cut-off events. For 3956/3956 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 695 event pairs, 34 based on Foata normal form. 6/213 useless extension candidates. Maximal degree in co-relation 780. Up to 121 conditions per place. [2024-06-21 17:07:55,392 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 23 selfloop transitions, 9 changer transitions 14/48 dead transitions. [2024-06-21 17:07:55,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 48 transitions, 309 flow [2024-06-21 17:07:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-21 17:07:55,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28152492668621704 [2024-06-21 17:07:55,392 INFO L175 Difference]: Start difference. First operand has 77 places, 34 transitions, 187 flow. Second operand 11 states and 96 transitions. [2024-06-21 17:07:55,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 48 transitions, 309 flow [2024-06-21 17:07:55,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 48 transitions, 281 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:55,395 INFO L231 Difference]: Finished difference. Result has 73 places, 30 transitions, 162 flow [2024-06-21 17:07:55,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=30} [2024-06-21 17:07:55,396 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-21 17:07:55,396 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 30 transitions, 162 flow [2024-06-21 17:07:55,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:55,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:55,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:55,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 17:07:55,396 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:55,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:55,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1693133687, now seen corresponding path program 15 times [2024-06-21 17:07:55,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:55,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369135618] [2024-06-21 17:07:55,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:55,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:56,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:56,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369135618] [2024-06-21 17:07:56,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369135618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:56,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:56,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 17:07:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455570830] [2024-06-21 17:07:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:56,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 17:07:56,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 17:07:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 17:07:56,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:56,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 30 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:56,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:56,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:56,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:56,621 INFO L124 PetriNetUnfolderBase]: 80/181 cut-off events. [2024-06-21 17:07:56,621 INFO L125 PetriNetUnfolderBase]: For 3230/3230 co-relation queries the response was YES. [2024-06-21 17:07:56,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 181 events. 80/181 cut-off events. For 3230/3230 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 569 event pairs, 12 based on Foata normal form. 6/187 useless extension candidates. Maximal degree in co-relation 682. Up to 75 conditions per place. [2024-06-21 17:07:56,622 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 20 selfloop transitions, 9 changer transitions 13/44 dead transitions. [2024-06-21 17:07:56,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 44 transitions, 276 flow [2024-06-21 17:07:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:07:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:07:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2024-06-21 17:07:56,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2756598240469208 [2024-06-21 17:07:56,623 INFO L175 Difference]: Start difference. First operand has 73 places, 30 transitions, 162 flow. Second operand 11 states and 94 transitions. [2024-06-21 17:07:56,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 44 transitions, 276 flow [2024-06-21 17:07:56,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 44 transitions, 250 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:07:56,625 INFO L231 Difference]: Finished difference. Result has 67 places, 25 transitions, 134 flow [2024-06-21 17:07:56,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=134, PETRI_PLACES=67, PETRI_TRANSITIONS=25} [2024-06-21 17:07:56,625 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-21 17:07:56,626 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 25 transitions, 134 flow [2024-06-21 17:07:56,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:07:56,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:56,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:56,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 17:07:56,626 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:56,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:56,626 INFO L85 PathProgramCache]: Analyzing trace with hash 477161791, now seen corresponding path program 16 times [2024-06-21 17:07:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:56,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936528629] [2024-06-21 17:07:56,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:56,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:57,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:57,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936528629] [2024-06-21 17:07:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936528629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:57,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:57,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858603127] [2024-06-21 17:07:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:57,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:57,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 25 transitions, 134 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:57,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:57,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:57,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:57,633 INFO L124 PetriNetUnfolderBase]: 49/116 cut-off events. [2024-06-21 17:07:57,633 INFO L125 PetriNetUnfolderBase]: For 1538/1538 co-relation queries the response was YES. [2024-06-21 17:07:57,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 116 events. 49/116 cut-off events. For 1538/1538 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 275 event pairs, 15 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 398. Up to 52 conditions per place. [2024-06-21 17:07:57,633 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 18 selfloop transitions, 6 changer transitions 11/37 dead transitions. [2024-06-21 17:07:57,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 37 transitions, 230 flow [2024-06-21 17:07:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 86 transitions. [2024-06-21 17:07:57,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27741935483870966 [2024-06-21 17:07:57,645 INFO L175 Difference]: Start difference. First operand has 67 places, 25 transitions, 134 flow. Second operand 10 states and 86 transitions. [2024-06-21 17:07:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 37 transitions, 230 flow [2024-06-21 17:07:57,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 37 transitions, 202 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 17:07:57,646 INFO L231 Difference]: Finished difference. Result has 58 places, 22 transitions, 106 flow [2024-06-21 17:07:57,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=106, PETRI_PLACES=58, PETRI_TRANSITIONS=22} [2024-06-21 17:07:57,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-06-21 17:07:57,647 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 22 transitions, 106 flow [2024-06-21 17:07:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:57,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:07:57,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 17:07:57,647 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:07:57,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:07:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 192097381, now seen corresponding path program 17 times [2024-06-21 17:07:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:07:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974215839] [2024-06-21 17:07:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:07:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:07:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:07:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:07:58,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:07:58,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974215839] [2024-06-21 17:07:58,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974215839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:07:58,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:07:58,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:07:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713516684] [2024-06-21 17:07:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:07:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:07:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:07:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:07:58,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:07:58,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-06-21 17:07:58,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 22 transitions, 106 flow. Second operand has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:58,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:07:58,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-06-21 17:07:58,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:07:58,629 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-21 17:07:58,629 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2024-06-21 17:07:58,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 65 events. 24/65 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 95 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 170. Up to 24 conditions per place. [2024-06-21 17:07:58,630 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2024-06-21 17:07:58,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 29 transitions, 150 flow [2024-06-21 17:07:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:07:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:07:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 78 transitions. [2024-06-21 17:07:58,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25161290322580643 [2024-06-21 17:07:58,630 INFO L175 Difference]: Start difference. First operand has 58 places, 22 transitions, 106 flow. Second operand 10 states and 78 transitions. [2024-06-21 17:07:58,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 29 transitions, 150 flow [2024-06-21 17:07:58,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 29 transitions, 118 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-21 17:07:58,631 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 17:07:58,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-21 17:07:58,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-06-21 17:07:58,631 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 17:07:58,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.416666666666667) internal successors, (77), 12 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) [2024-06-21 17:07:58,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 17:07:58,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 17:07:58,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 17:07:58,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 17:07:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 17:07:58,634 INFO L445 BasicCegarLoop]: Path program histogram: [25, 17, 15, 14, 11, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:07:58,636 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 17:07:58,637 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 17:07:58,639 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 17:07:58,639 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 17:07:58,640 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 05:07:58 BasicIcfg [2024-06-21 17:07:58,640 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 17:07:58,641 INFO L158 Benchmark]: Toolchain (without parser) took 145343.17ms. Allocated memory was 213.9MB in the beginning and 702.5MB in the end (delta: 488.6MB). Free memory was 179.3MB in the beginning and 653.2MB in the end (delta: -473.9MB). Peak memory consumption was 424.0MB. Max. memory is 16.1GB. [2024-06-21 17:07:58,641 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 151.0MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:07:58,641 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 151.0MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:07:58,641 INFO L158 Benchmark]: CACSL2BoogieTranslator took 487.18ms. Allocated memory is still 213.9MB. Free memory was 179.1MB in the beginning and 152.0MB in the end (delta: 27.0MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2024-06-21 17:07:58,641 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.83ms. Allocated memory is still 213.9MB. Free memory was 152.0MB in the beginning and 149.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 17:07:58,641 INFO L158 Benchmark]: Boogie Preprocessor took 70.04ms. Allocated memory is still 213.9MB. Free memory was 149.0MB in the beginning and 145.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:07:58,642 INFO L158 Benchmark]: RCFGBuilder took 630.23ms. Allocated memory is still 213.9MB. Free memory was 145.9MB in the beginning and 98.7MB in the end (delta: 47.2MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. [2024-06-21 17:07:58,642 INFO L158 Benchmark]: TraceAbstraction took 144084.96ms. Allocated memory was 213.9MB in the beginning and 702.5MB in the end (delta: 488.6MB). Free memory was 97.6MB in the beginning and 653.2MB in the end (delta: -555.5MB). Peak memory consumption was 342.0MB. Max. memory is 16.1GB. [2024-06-21 17:07:58,643 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 151.0MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 151.0MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 487.18ms. Allocated memory is still 213.9MB. Free memory was 179.1MB in the beginning and 152.0MB in the end (delta: 27.0MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.83ms. Allocated memory is still 213.9MB. Free memory was 152.0MB in the beginning and 149.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.04ms. Allocated memory is still 213.9MB. Free memory was 149.0MB in the beginning and 145.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 630.23ms. Allocated memory is still 213.9MB. Free memory was 145.9MB in the beginning and 98.7MB in the end (delta: 47.2MB). Peak memory consumption was 46.1MB. Max. memory is 16.1GB. * TraceAbstraction took 144084.96ms. Allocated memory was 213.9MB in the beginning and 702.5MB in the end (delta: 488.6MB). Free memory was 97.6MB in the beginning and 653.2MB in the end (delta: -555.5MB). Peak memory consumption was 342.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 803]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 804]: 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, 50 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: 144.0s, OverallIterations: 141, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 57.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8193 SdHoareTripleChecker+Valid, 25.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7014 mSDsluCounter, 7995 SdHoareTripleChecker+Invalid, 21.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7048 mSDsCounter, 1831 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41795 IncrementalHoareTripleChecker+Invalid, 43626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1831 mSolverCounterUnsat, 947 mSDtfsCounter, 41795 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1459 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3219 ImplicationChecksByTransitivity, 37.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1834occurred in iteration=57, InterpolantAutomatonStates: 1316, 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: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 84.8s InterpolantComputationTime, 2310 NumberOfCodeBlocks, 2310 NumberOfCodeBlocksAsserted, 141 NumberOfCheckSat, 2169 ConstructedInterpolants, 0 QuantifiedInterpolants, 96964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 141 InterpolantComputations, 141 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 17:07:58,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE