./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi010.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/rfi010.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi010.i ./goblint.2024-06-19_11-23-25.files/protection/rfi010.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-7724a2d-m [2024-06-27 20:46:44,995 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:46:45,061 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:46:45,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:46:45,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:46:45,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:46:45,096 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:46:45,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:46:45,097 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:46:45,100 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:46:45,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:46:45,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:46:45,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:46:45,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:46:45,103 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:46:45,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:46:45,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:46:45,103 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:46:45,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:46:45,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:46:45,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:46:45,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:46:45,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:46:45,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:46:45,104 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:46:45,104 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:46:45,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:46:45,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:46:45,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:46:45,105 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:46:45,106 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:46:45,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:46:45,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:46:45,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:46:45,108 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:46:45,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:46:45,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:46:45,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:46:45,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:46:45,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:46:45,331 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:46:45,332 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:46:45,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi010.yml/witness.yml [2024-06-27 20:46:45,494 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:46:45,494 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:46:45,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi010.i [2024-06-27 20:46:46,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:46:46,762 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:46:46,763 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi010.i [2024-06-27 20:46:46,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f6b75bf8/83b35e44696d4f8c96901c24bd49e2dc/FLAGacb4ee5c9 [2024-06-27 20:46:46,787 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f6b75bf8/83b35e44696d4f8c96901c24bd49e2dc [2024-06-27 20:46:46,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:46:46,789 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:46:46,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:46:46,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:46:46,795 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:46:46,795 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:46:45" (1/2) ... [2024-06-27 20:46:46,796 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96849ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:46:46, skipping insertion in model container [2024-06-27 20:46:46,796 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:46:45" (1/2) ... [2024-06-27 20:46:46,797 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bb5da70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:46:46, skipping insertion in model container [2024-06-27 20:46:46,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:46:46" (2/2) ... [2024-06-27 20:46:46,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96849ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:46, skipping insertion in model container [2024-06-27 20:46:46,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:46:46" (2/2) ... [2024-06-27 20:46:46,798 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:46:46,847 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:46:46,848 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:46:46,848 INFO L97 edCorrectnessWitness]: Location invariant before [L827-L827] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 20:46:46,849 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:46:46,849 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-27 20:46:46,884 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:46:47,268 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:46:47,275 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:46:47,370 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:46:47,405 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:46:47,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47 WrapperNode [2024-06-27 20:46:47,406 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:46:47,407 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:46:47,407 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:46:47,407 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:46:47,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,457 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-27 20:46:47,458 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:46:47,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:46:47,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:46:47,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:46:47,467 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,504 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]. [2024-06-27 20:46:47,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,518 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,523 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:46:47,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:46:47,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:46:47,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:46:47,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (1/1) ... [2024-06-27 20:46:47,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:46:47,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:46:47,557 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) [2024-06-27 20:46:47,573 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 [2024-06-27 20:46:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:46:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:46:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:46:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:46:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:46:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:46:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:46:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:46:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:46:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:46:47,589 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:46:47,708 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:46:47,710 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:46:48,037 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:46:48,037 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:46:48,183 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:46:48,183 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:46:48,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:46:48 BoogieIcfgContainer [2024-06-27 20:46:48,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:46:48,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:46:48,189 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:46:48,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:46:48,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:46:45" (1/4) ... [2024-06-27 20:46:48,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326df852 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:46:48, skipping insertion in model container [2024-06-27 20:46:48,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:46:46" (2/4) ... [2024-06-27 20:46:48,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326df852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:46:48, skipping insertion in model container [2024-06-27 20:46:48,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:46:47" (3/4) ... [2024-06-27 20:46:48,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326df852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:46:48, skipping insertion in model container [2024-06-27 20:46:48,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:46:48" (4/4) ... [2024-06-27 20:46:48,198 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi010.i [2024-06-27 20:46:48,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:46:48,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 20:46:48,211 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:46:48,245 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:46:48,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 20:46:48,316 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-27 20:46:48,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:46:48,319 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 42 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. [2024-06-27 20:46:48,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-27 20:46:48,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-27 20:46:48,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:46:48,339 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;@1a638d4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:46:48,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 20:46:48,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:46:48,343 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:46:48,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:46:48,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:48,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:46:48,344 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)] === [2024-06-27 20:46:48,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 358540720, now seen corresponding path program 1 times [2024-06-27 20:46:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:48,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473306941] [2024-06-27 20:46:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:49,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473306941] [2024-06-27 20:46:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473306941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:49,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:49,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:46:49,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6012531] [2024-06-27 20:46:49,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:46:49,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:49,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:46:49,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:46:49,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-27 20:46:49,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:49,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:49,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-27 20:46:49,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:49,322 INFO L124 PetriNetUnfolderBase]: 131/261 cut-off events. [2024-06-27 20:46:49,323 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 20:46:49,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 261 events. 131/261 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1020 event pairs, 75 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 506. Up to 235 conditions per place. [2024-06-27 20:46:49,328 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 20 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-27 20:46:49,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 113 flow [2024-06-27 20:46:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:46:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:46:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-06-27 20:46:49,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-06-27 20:46:49,339 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 58 transitions. [2024-06-27 20:46:49,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 113 flow [2024-06-27 20:46:49,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 20:46:49,343 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-27 20:46:49,344 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} [2024-06-27 20:46:49,347 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-27 20:46:49,347 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-27 20:46:49,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:49,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:49,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:49,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:46:49,348 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)] === [2024-06-27 20:46:49,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:49,349 INFO L85 PathProgramCache]: Analyzing trace with hash 960277711, now seen corresponding path program 1 times [2024-06-27 20:46:49,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:49,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331044018] [2024-06-27 20:46:49,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:49,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:49,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331044018] [2024-06-27 20:46:49,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331044018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:49,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:49,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:46:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234091112] [2024-06-27 20:46:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:49,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:46:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:46:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:46:49,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:46:49,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2024-06-27 20:46:49,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:49,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:46:49,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:49,906 INFO L124 PetriNetUnfolderBase]: 147/280 cut-off events. [2024-06-27 20:46:49,907 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-06-27 20:46:49,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 280 events. 147/280 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1042 event pairs, 59 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 628. Up to 244 conditions per place. [2024-06-27 20:46:49,909 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-27 20:46:49,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 161 flow [2024-06-27 20:46:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:46:49,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:46:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-06-27 20:46:49,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-06-27 20:46:49,910 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 73 transitions. [2024-06-27 20:46:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 161 flow [2024-06-27 20:46:49,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:46:49,912 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-27 20:46:49,912 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} [2024-06-27 20:46:49,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-27 20:46:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-27 20:46:49,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 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) [2024-06-27 20:46:49,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:49,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:49,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:46:49,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:46:49,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1645613247, now seen corresponding path program 1 times [2024-06-27 20:46:49,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:49,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493993715] [2024-06-27 20:46:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:50,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493993715] [2024-06-27 20:46:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493993715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:50,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:50,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:46:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906086691] [2024-06-27 20:46:50,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:50,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:46:50,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:46:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:46:50,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-27 20:46:50,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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) [2024-06-27 20:46:50,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:50,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-27 20:46:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:50,465 INFO L124 PetriNetUnfolderBase]: 123/246 cut-off events. [2024-06-27 20:46:50,465 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-06-27 20:46:50,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 246 events. 123/246 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 933 event pairs, 62 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 611. Up to 219 conditions per place. [2024-06-27 20:46:50,467 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 23 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2024-06-27 20:46:50,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 171 flow [2024-06-27 20:46:50,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:46:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:46:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-06-27 20:46:50,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-06-27 20:46:50,469 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 73 transitions. [2024-06-27 20:46:50,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 171 flow [2024-06-27 20:46:50,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 20:46:50,470 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 113 flow [2024-06-27 20:46:50,471 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-27 20:46:50,471 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-27 20:46:50,471 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 113 flow [2024-06-27 20:46:50,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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) [2024-06-27 20:46:50,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:50,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:50,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:46:50,472 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)] === [2024-06-27 20:46:50,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1069977843, now seen corresponding path program 1 times [2024-06-27 20:46:50,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:50,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620847165] [2024-06-27 20:46:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:51,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620847165] [2024-06-27 20:46:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620847165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:51,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:51,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:46:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473982566] [2024-06-27 20:46:51,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:51,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:46:51,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:46:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:46:51,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-27 20:46:51,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:51,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:51,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-27 20:46:51,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:51,413 INFO L124 PetriNetUnfolderBase]: 141/269 cut-off events. [2024-06-27 20:46:51,414 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-06-27 20:46:51,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 269 events. 141/269 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 992 event pairs, 24 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 723. Up to 215 conditions per place. [2024-06-27 20:46:51,415 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 31 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-27 20:46:51,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 225 flow [2024-06-27 20:46:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 20:46:51,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-27 20:46:51,417 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 113 flow. Second operand 6 states and 99 transitions. [2024-06-27 20:46:51,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 225 flow [2024-06-27 20:46:51,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 214 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 20:46:51,419 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 127 flow [2024-06-27 20:46:51,419 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-27 20:46:51,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-27 20:46:51,420 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 127 flow [2024-06-27 20:46:51,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:51,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:51,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:51,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:46:51,421 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)] === [2024-06-27 20:46:51,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:51,421 INFO L85 PathProgramCache]: Analyzing trace with hash 539897294, now seen corresponding path program 1 times [2024-06-27 20:46:51,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:51,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58496789] [2024-06-27 20:46:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:52,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:52,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58496789] [2024-06-27 20:46:52,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58496789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:52,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:52,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:46:52,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298807957] [2024-06-27 20:46:52,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:52,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:46:52,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:52,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:46:52,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:46:52,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-27 20:46:52,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:52,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-27 20:46:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:52,174 INFO L124 PetriNetUnfolderBase]: 117/239 cut-off events. [2024-06-27 20:46:52,175 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2024-06-27 20:46:52,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 239 events. 117/239 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 888 event pairs, 33 based on Foata normal form. 1/239 useless extension candidates. Maximal degree in co-relation 687. Up to 205 conditions per place. [2024-06-27 20:46:52,187 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 25 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-27 20:46:52,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 215 flow [2024-06-27 20:46:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-27 20:46:52,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-27 20:46:52,191 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 127 flow. Second operand 6 states and 84 transitions. [2024-06-27 20:46:52,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 215 flow [2024-06-27 20:46:52,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 199 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:46:52,195 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 144 flow [2024-06-27 20:46:52,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-27 20:46:52,197 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-27 20:46:52,199 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 144 flow [2024-06-27 20:46:52,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:52,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:52,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:52,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:46:52,204 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)] === [2024-06-27 20:46:52,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -886588478, now seen corresponding path program 1 times [2024-06-27 20:46:52,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:52,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488691392] [2024-06-27 20:46:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:52,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:52,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488691392] [2024-06-27 20:46:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488691392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:52,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:46:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112070295] [2024-06-27 20:46:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:52,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:46:52,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:46:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:46:52,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:52,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:52,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:52,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:52,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:52,848 INFO L124 PetriNetUnfolderBase]: 143/277 cut-off events. [2024-06-27 20:46:52,849 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2024-06-27 20:46:52,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 277 events. 143/277 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1043 event pairs, 39 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 851. Up to 240 conditions per place. [2024-06-27 20:46:52,850 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-27 20:46:52,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 258 flow [2024-06-27 20:46:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-27 20:46:52,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-27 20:46:52,852 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 144 flow. Second operand 6 states and 83 transitions. [2024-06-27 20:46:52,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 258 flow [2024-06-27 20:46:52,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 241 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:52,854 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 160 flow [2024-06-27 20:46:52,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-06-27 20:46:52,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-27 20:46:52,854 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 160 flow [2024-06-27 20:46:52,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:52,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:52,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:52,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:46:52,855 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)] === [2024-06-27 20:46:52,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -443061248, now seen corresponding path program 2 times [2024-06-27 20:46:52,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:52,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658887675] [2024-06-27 20:46:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:52,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:53,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:53,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658887675] [2024-06-27 20:46:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658887675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:53,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:53,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:46:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072841178] [2024-06-27 20:46:53,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:53,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:46:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:46:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:46:53,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:53,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:53,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:53,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:53,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:53,429 INFO L124 PetriNetUnfolderBase]: 144/278 cut-off events. [2024-06-27 20:46:53,429 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-06-27 20:46:53,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 278 events. 144/278 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1087 event pairs, 43 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 913. Up to 233 conditions per place. [2024-06-27 20:46:53,431 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2024-06-27 20:46:53,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 274 flow [2024-06-27 20:46:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-27 20:46:53,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-27 20:46:53,433 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 160 flow. Second operand 6 states and 83 transitions. [2024-06-27 20:46:53,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 274 flow [2024-06-27 20:46:53,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 257 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:53,434 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 186 flow [2024-06-27 20:46:53,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-06-27 20:46:53,435 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-27 20:46:53,435 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 186 flow [2024-06-27 20:46:53,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:53,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:53,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:53,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:46:53,436 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)] === [2024-06-27 20:46:53,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1103110033, now seen corresponding path program 1 times [2024-06-27 20:46:53,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749026600] [2024-06-27 20:46:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:53,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:53,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749026600] [2024-06-27 20:46:53,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749026600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:53,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:53,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326093888] [2024-06-27 20:46:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:53,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:53,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:53,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:53,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:53,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:54,153 INFO L124 PetriNetUnfolderBase]: 160/311 cut-off events. [2024-06-27 20:46:54,154 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2024-06-27 20:46:54,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 311 events. 160/311 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1254 event pairs, 39 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1074. Up to 261 conditions per place. [2024-06-27 20:46:54,156 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 14 changer transitions 0/56 dead transitions. [2024-06-27 20:46:54,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 366 flow [2024-06-27 20:46:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 20:46:54,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-27 20:46:54,157 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 186 flow. Second operand 8 states and 107 transitions. [2024-06-27 20:46:54,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 366 flow [2024-06-27 20:46:54,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 331 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:54,159 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 248 flow [2024-06-27 20:46:54,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-27 20:46:54,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-27 20:46:54,160 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 248 flow [2024-06-27 20:46:54,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:54,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:54,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:54,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:46:54,161 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)] === [2024-06-27 20:46:54,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1913740113, now seen corresponding path program 2 times [2024-06-27 20:46:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:54,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587916416] [2024-06-27 20:46:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:54,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587916416] [2024-06-27 20:46:54,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587916416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:54,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:54,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671095007] [2024-06-27 20:46:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:54,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:54,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:54,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:54,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:54,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:54,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:54,863 INFO L124 PetriNetUnfolderBase]: 166/323 cut-off events. [2024-06-27 20:46:54,864 INFO L125 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2024-06-27 20:46:54,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 323 events. 166/323 cut-off events. For 1227/1227 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1313 event pairs, 38 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 1211. Up to 259 conditions per place. [2024-06-27 20:46:54,866 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 35 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2024-06-27 20:46:54,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 404 flow [2024-06-27 20:46:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 20:46:54,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-27 20:46:54,867 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 248 flow. Second operand 7 states and 95 transitions. [2024-06-27 20:46:54,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 404 flow [2024-06-27 20:46:54,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 377 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:54,869 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 293 flow [2024-06-27 20:46:54,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-06-27 20:46:54,870 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-27 20:46:54,870 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 293 flow [2024-06-27 20:46:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:54,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:54,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:54,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:46:54,871 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)] === [2024-06-27 20:46:54,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1706819763, now seen corresponding path program 3 times [2024-06-27 20:46:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602619923] [2024-06-27 20:46:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:55,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602619923] [2024-06-27 20:46:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602619923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:55,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:55,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:55,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140468457] [2024-06-27 20:46:55,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:55,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:55,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:55,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:55,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:55,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 293 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:55,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:55,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:55,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:55,574 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-06-27 20:46:55,575 INFO L125 PetriNetUnfolderBase]: For 1627/1627 co-relation queries the response was YES. [2024-06-27 20:46:55,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 334 events. 174/334 cut-off events. For 1627/1627 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1358 event pairs, 41 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1382. Up to 249 conditions per place. [2024-06-27 20:46:55,577 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 26 changer transitions 0/62 dead transitions. [2024-06-27 20:46:55,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 499 flow [2024-06-27 20:46:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 20:46:55,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-27 20:46:55,578 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 293 flow. Second operand 7 states and 96 transitions. [2024-06-27 20:46:55,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 499 flow [2024-06-27 20:46:55,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 441 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:55,581 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 364 flow [2024-06-27 20:46:55,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-27 20:46:55,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-27 20:46:55,582 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 364 flow [2024-06-27 20:46:55,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:55,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:55,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:55,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:46:55,582 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)] === [2024-06-27 20:46:55,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1707086673, now seen corresponding path program 4 times [2024-06-27 20:46:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:55,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073194040] [2024-06-27 20:46:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:55,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073194040] [2024-06-27 20:46:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073194040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:56,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:56,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692298073] [2024-06-27 20:46:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:56,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:56,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:56,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:56,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:56,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:56,393 INFO L124 PetriNetUnfolderBase]: 170/328 cut-off events. [2024-06-27 20:46:56,396 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2024-06-27 20:46:56,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 328 events. 170/328 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1334 event pairs, 41 based on Foata normal form. 2/327 useless extension candidates. Maximal degree in co-relation 1397. Up to 263 conditions per place. [2024-06-27 20:46:56,399 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 41 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2024-06-27 20:46:56,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 527 flow [2024-06-27 20:46:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-27 20:46:56,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-27 20:46:56,400 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 364 flow. Second operand 7 states and 95 transitions. [2024-06-27 20:46:56,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 527 flow [2024-06-27 20:46:56,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 495 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:46:56,406 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 383 flow [2024-06-27 20:46:56,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-06-27 20:46:56,407 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-27 20:46:56,407 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 383 flow [2024-06-27 20:46:56,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:56,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:56,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:56,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:46:56,408 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)] === [2024-06-27 20:46:56,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -849719251, now seen corresponding path program 1 times [2024-06-27 20:46:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:56,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378539927] [2024-06-27 20:46:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:57,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:57,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378539927] [2024-06-27 20:46:57,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378539927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:57,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:57,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:57,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962065408] [2024-06-27 20:46:57,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:57,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:57,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:57,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:57,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 383 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:57,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:57,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:57,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:57,328 INFO L124 PetriNetUnfolderBase]: 168/327 cut-off events. [2024-06-27 20:46:57,328 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2024-06-27 20:46:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 327 events. 168/327 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1326 event pairs, 41 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 1439. Up to 286 conditions per place. [2024-06-27 20:46:57,331 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2024-06-27 20:46:57,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 533 flow [2024-06-27 20:46:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-27 20:46:57,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-27 20:46:57,333 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 383 flow. Second operand 8 states and 101 transitions. [2024-06-27 20:46:57,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 533 flow [2024-06-27 20:46:57,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 495 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:57,336 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 388 flow [2024-06-27 20:46:57,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=388, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-06-27 20:46:57,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-27 20:46:57,337 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 388 flow [2024-06-27 20:46:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:57,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:57,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:57,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:46:57,338 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)] === [2024-06-27 20:46:57,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash 803414817, now seen corresponding path program 1 times [2024-06-27 20:46:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790265326] [2024-06-27 20:46:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:57,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:57,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:57,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790265326] [2024-06-27 20:46:57,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790265326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:57,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:57,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:57,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153682901] [2024-06-27 20:46:57,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:57,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:57,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:57,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:57,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:58,126 INFO L124 PetriNetUnfolderBase]: 166/324 cut-off events. [2024-06-27 20:46:58,126 INFO L125 PetriNetUnfolderBase]: For 1890/1890 co-relation queries the response was YES. [2024-06-27 20:46:58,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 324 events. 166/324 cut-off events. For 1890/1890 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1313 event pairs, 36 based on Foata normal form. 1/324 useless extension candidates. Maximal degree in co-relation 1435. Up to 269 conditions per place. [2024-06-27 20:46:58,128 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-27 20:46:58,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 574 flow [2024-06-27 20:46:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-27 20:46:58,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-27 20:46:58,130 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 388 flow. Second operand 7 states and 96 transitions. [2024-06-27 20:46:58,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 574 flow [2024-06-27 20:46:58,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 528 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:58,133 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 395 flow [2024-06-27 20:46:58,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-27 20:46:58,134 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-27 20:46:58,134 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 395 flow [2024-06-27 20:46:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2024-06-27 20:46:58,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:58,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:58,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:46:58,135 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)] === [2024-06-27 20:46:58,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:58,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1607979711, now seen corresponding path program 1 times [2024-06-27 20:46:58,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:58,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743640169] [2024-06-27 20:46:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:58,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:58,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:58,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743640169] [2024-06-27 20:46:58,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743640169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:58,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:58,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784811919] [2024-06-27 20:46:58,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:58,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:58,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:58,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:58,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 395 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:58,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:58,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:58,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:59,021 INFO L124 PetriNetUnfolderBase]: 178/344 cut-off events. [2024-06-27 20:46:59,021 INFO L125 PetriNetUnfolderBase]: For 2502/2502 co-relation queries the response was YES. [2024-06-27 20:46:59,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 344 events. 178/344 cut-off events. For 2502/2502 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1418 event pairs, 35 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 1556. Up to 264 conditions per place. [2024-06-27 20:46:59,023 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 48 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-06-27 20:46:59,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 601 flow [2024-06-27 20:46:59,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-27 20:46:59,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-27 20:46:59,024 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 395 flow. Second operand 8 states and 108 transitions. [2024-06-27 20:46:59,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 601 flow [2024-06-27 20:46:59,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 564 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:46:59,027 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 441 flow [2024-06-27 20:46:59,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2024-06-27 20:46:59,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-27 20:46:59,028 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 441 flow [2024-06-27 20:46:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:59,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:59,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:46:59,029 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)] === [2024-06-27 20:46:59,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1162588547, now seen corresponding path program 2 times [2024-06-27 20:46:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:59,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322331810] [2024-06-27 20:46:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:59,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:59,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:59,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322331810] [2024-06-27 20:46:59,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322331810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:59,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:59,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:46:59,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378181466] [2024-06-27 20:46:59,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:59,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:46:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:46:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:46:59,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:46:59,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 441 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:59,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:59,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:46:59,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:59,941 INFO L124 PetriNetUnfolderBase]: 184/352 cut-off events. [2024-06-27 20:46:59,941 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-27 20:46:59,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 352 events. 184/352 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1440 event pairs, 37 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1697. Up to 281 conditions per place. [2024-06-27 20:46:59,944 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2024-06-27 20:46:59,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 657 flow [2024-06-27 20:46:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:46:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:46:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 20:46:59,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-27 20:46:59,945 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 441 flow. Second operand 8 states and 107 transitions. [2024-06-27 20:46:59,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 657 flow [2024-06-27 20:46:59,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 598 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:59,949 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 468 flow [2024-06-27 20:46:59,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-06-27 20:46:59,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-27 20:46:59,949 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 468 flow [2024-06-27 20:46:59,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:59,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:59,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:59,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:46:59,950 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)] === [2024-06-27 20:46:59,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:59,951 INFO L85 PathProgramCache]: Analyzing trace with hash 976319921, now seen corresponding path program 3 times [2024-06-27 20:46:59,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:59,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948308187] [2024-06-27 20:46:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:59,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:00,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:00,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948308187] [2024-06-27 20:47:00,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948308187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:00,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:00,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431344597] [2024-06-27 20:47:00,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:00,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:00,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:00,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:00,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:00,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 468 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:00,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:00,769 INFO L124 PetriNetUnfolderBase]: 187/359 cut-off events. [2024-06-27 20:47:00,770 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2024-06-27 20:47:00,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796 conditions, 359 events. 187/359 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1486 event pairs, 37 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1762. Up to 248 conditions per place. [2024-06-27 20:47:00,772 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 42 selfloop transitions, 35 changer transitions 0/81 dead transitions. [2024-06-27 20:47:00,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 740 flow [2024-06-27 20:47:00,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-06-27 20:47:00,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2024-06-27 20:47:00,773 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 468 flow. Second operand 8 states and 109 transitions. [2024-06-27 20:47:00,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 740 flow [2024-06-27 20:47:00,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 676 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:00,777 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 568 flow [2024-06-27 20:47:00,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=568, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-27 20:47:00,778 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-27 20:47:00,778 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 568 flow [2024-06-27 20:47:00,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:00,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:00,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:00,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:47:00,779 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)] === [2024-06-27 20:47:00,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1371507681, now seen corresponding path program 4 times [2024-06-27 20:47:00,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:00,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208467577] [2024-06-27 20:47:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:00,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:01,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208467577] [2024-06-27 20:47:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208467577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:01,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:01,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376151377] [2024-06-27 20:47:01,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:01,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:01,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:01,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:01,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:01,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 568 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:01,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:01,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:01,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:01,644 INFO L124 PetriNetUnfolderBase]: 188/365 cut-off events. [2024-06-27 20:47:01,644 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-06-27 20:47:01,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 365 events. 188/365 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1518 event pairs, 38 based on Foata normal form. 2/366 useless extension candidates. Maximal degree in co-relation 1883. Up to 312 conditions per place. [2024-06-27 20:47:01,647 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2024-06-27 20:47:01,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 766 flow [2024-06-27 20:47:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:01,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-27 20:47:01,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-27 20:47:01,648 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 568 flow. Second operand 8 states and 103 transitions. [2024-06-27 20:47:01,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 766 flow [2024-06-27 20:47:01,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 718 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:47:01,652 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 583 flow [2024-06-27 20:47:01,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2024-06-27 20:47:01,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2024-06-27 20:47:01,653 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 583 flow [2024-06-27 20:47:01,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:01,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:01,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:47:01,654 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)] === [2024-06-27 20:47:01,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -571492193, now seen corresponding path program 1 times [2024-06-27 20:47:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456262871] [2024-06-27 20:47:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:02,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:02,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456262871] [2024-06-27 20:47:02,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456262871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:02,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:02,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:02,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291468103] [2024-06-27 20:47:02,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:02,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:02,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:02,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:02,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:02,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:02,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 583 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:02,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:02,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:02,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:02,836 INFO L124 PetriNetUnfolderBase]: 185/360 cut-off events. [2024-06-27 20:47:02,837 INFO L125 PetriNetUnfolderBase]: For 3962/3962 co-relation queries the response was YES. [2024-06-27 20:47:02,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 360 events. 185/360 cut-off events. For 3962/3962 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1476 event pairs, 37 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 1879. Up to 309 conditions per place. [2024-06-27 20:47:02,839 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 66 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-27 20:47:02,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 765 flow [2024-06-27 20:47:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-27 20:47:02,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-27 20:47:02,841 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 583 flow. Second operand 9 states and 111 transitions. [2024-06-27 20:47:02,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 765 flow [2024-06-27 20:47:02,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 722 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:02,847 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 570 flow [2024-06-27 20:47:02,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=570, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-06-27 20:47:02,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-27 20:47:02,848 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 570 flow [2024-06-27 20:47:02,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:02,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:02,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:02,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:47:02,850 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)] === [2024-06-27 20:47:02,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:02,850 INFO L85 PathProgramCache]: Analyzing trace with hash -319541426, now seen corresponding path program 1 times [2024-06-27 20:47:02,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:02,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872866715] [2024-06-27 20:47:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:02,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:03,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:03,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872866715] [2024-06-27 20:47:03,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872866715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:03,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:03,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849484944] [2024-06-27 20:47:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:03,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:03,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:03,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 570 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:03,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:03,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:03,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:04,139 INFO L124 PetriNetUnfolderBase]: 188/367 cut-off events. [2024-06-27 20:47:04,139 INFO L125 PetriNetUnfolderBase]: For 4074/4074 co-relation queries the response was YES. [2024-06-27 20:47:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 367 events. 188/367 cut-off events. For 4074/4074 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1527 event pairs, 32 based on Foata normal form. 1/367 useless extension candidates. Maximal degree in co-relation 1919. Up to 303 conditions per place. [2024-06-27 20:47:04,142 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 70 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-27 20:47:04,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 798 flow [2024-06-27 20:47:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 20:47:04,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-27 20:47:04,143 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 570 flow. Second operand 8 states and 107 transitions. [2024-06-27 20:47:04,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 798 flow [2024-06-27 20:47:04,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 766 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:04,148 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 599 flow [2024-06-27 20:47:04,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=599, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-06-27 20:47:04,149 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-27 20:47:04,149 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 599 flow [2024-06-27 20:47:04,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:04,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:04,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:47:04,150 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)] === [2024-06-27 20:47:04,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash -171724436, now seen corresponding path program 2 times [2024-06-27 20:47:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:04,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110053178] [2024-06-27 20:47:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110053178] [2024-06-27 20:47:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110053178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:05,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813885323] [2024-06-27 20:47:05,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:05,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:05,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:05,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 599 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:05,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:05,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:05,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:05,469 INFO L124 PetriNetUnfolderBase]: 191/372 cut-off events. [2024-06-27 20:47:05,469 INFO L125 PetriNetUnfolderBase]: For 4435/4435 co-relation queries the response was YES. [2024-06-27 20:47:05,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 372 events. 191/372 cut-off events. For 4435/4435 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1547 event pairs, 32 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 1994. Up to 297 conditions per place. [2024-06-27 20:47:05,472 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 64 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-27 20:47:05,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 841 flow [2024-06-27 20:47:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-27 20:47:05,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-27 20:47:05,473 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 599 flow. Second operand 8 states and 106 transitions. [2024-06-27 20:47:05,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 841 flow [2024-06-27 20:47:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 796 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:05,480 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 632 flow [2024-06-27 20:47:05,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=632, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-06-27 20:47:05,480 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-27 20:47:05,480 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 632 flow [2024-06-27 20:47:05,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:05,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:05,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:05,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:47:05,481 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)] === [2024-06-27 20:47:05,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash 423730924, now seen corresponding path program 3 times [2024-06-27 20:47:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:05,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292809655] [2024-06-27 20:47:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:05,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:06,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292809655] [2024-06-27 20:47:06,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292809655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:06,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:06,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:06,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521482439] [2024-06-27 20:47:06,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:06,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:06,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:06,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:06,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 632 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:06,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:06,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:06,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:06,682 INFO L124 PetriNetUnfolderBase]: 194/377 cut-off events. [2024-06-27 20:47:06,683 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-06-27 20:47:06,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 377 events. 194/377 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1599 event pairs, 35 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 2079. Up to 274 conditions per place. [2024-06-27 20:47:06,685 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 30 changer transitions 0/91 dead transitions. [2024-06-27 20:47:06,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 950 flow [2024-06-27 20:47:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 20:47:06,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-27 20:47:06,687 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 632 flow. Second operand 8 states and 107 transitions. [2024-06-27 20:47:06,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 950 flow [2024-06-27 20:47:06,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 890 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:06,694 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 705 flow [2024-06-27 20:47:06,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=705, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-06-27 20:47:06,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-27 20:47:06,694 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 705 flow [2024-06-27 20:47:06,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:06,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:06,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:06,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:47:06,695 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)] === [2024-06-27 20:47:06,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash 167230414, now seen corresponding path program 4 times [2024-06-27 20:47:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:06,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148487296] [2024-06-27 20:47:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:07,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:07,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148487296] [2024-06-27 20:47:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148487296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:07,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:07,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988203171] [2024-06-27 20:47:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:07,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:07,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 705 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:07,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:07,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:07,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:07,776 INFO L124 PetriNetUnfolderBase]: 192/374 cut-off events. [2024-06-27 20:47:07,776 INFO L125 PetriNetUnfolderBase]: For 5296/5296 co-relation queries the response was YES. [2024-06-27 20:47:07,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 374 events. 192/374 cut-off events. For 5296/5296 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1579 event pairs, 35 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 2082. Up to 298 conditions per place. [2024-06-27 20:47:07,779 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 67 selfloop transitions, 20 changer transitions 0/91 dead transitions. [2024-06-27 20:47:07,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 91 transitions, 939 flow [2024-06-27 20:47:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-27 20:47:07,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-27 20:47:07,783 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 705 flow. Second operand 8 states and 106 transitions. [2024-06-27 20:47:07,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 91 transitions, 939 flow [2024-06-27 20:47:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 872 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:07,795 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 683 flow [2024-06-27 20:47:07,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=683, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2024-06-27 20:47:07,795 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-27 20:47:07,795 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 683 flow [2024-06-27 20:47:07,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:07,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:07,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:07,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:47:07,797 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)] === [2024-06-27 20:47:07,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash -545923060, now seen corresponding path program 1 times [2024-06-27 20:47:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:07,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353690897] [2024-06-27 20:47:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:07,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:08,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:08,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353690897] [2024-06-27 20:47:08,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353690897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:08,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:08,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38881511] [2024-06-27 20:47:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:08,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:08,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:08,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:08,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:08,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:08,731 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2024-06-27 20:47:08,732 INFO L125 PetriNetUnfolderBase]: For 5917/5917 co-relation queries the response was YES. [2024-06-27 20:47:08,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 387 events. 200/387 cut-off events. For 5917/5917 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1634 event pairs, 35 based on Foata normal form. 1/385 useless extension candidates. Maximal degree in co-relation 2208. Up to 246 conditions per place. [2024-06-27 20:47:08,753 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 50 selfloop transitions, 42 changer transitions 0/96 dead transitions. [2024-06-27 20:47:08,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 1031 flow [2024-06-27 20:47:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-27 20:47:08,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-27 20:47:08,755 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 683 flow. Second operand 8 states and 112 transitions. [2024-06-27 20:47:08,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 1031 flow [2024-06-27 20:47:08,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 948 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:08,764 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 802 flow [2024-06-27 20:47:08,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=802, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-06-27 20:47:08,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-27 20:47:08,765 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 802 flow [2024-06-27 20:47:08,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:08,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:08,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:08,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:47:08,766 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)] === [2024-06-27 20:47:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:08,767 INFO L85 PathProgramCache]: Analyzing trace with hash 167238350, now seen corresponding path program 2 times [2024-06-27 20:47:08,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:08,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372069204] [2024-06-27 20:47:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:08,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:09,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:09,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372069204] [2024-06-27 20:47:09,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372069204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:09,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:09,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344008214] [2024-06-27 20:47:09,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:09,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:09,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 802 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:09,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:09,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:09,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:10,146 INFO L124 PetriNetUnfolderBase]: 196/378 cut-off events. [2024-06-27 20:47:10,146 INFO L125 PetriNetUnfolderBase]: For 6573/6573 co-relation queries the response was YES. [2024-06-27 20:47:10,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 378 events. 196/378 cut-off events. For 6573/6573 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1600 event pairs, 39 based on Foata normal form. 2/376 useless extension candidates. Maximal degree in co-relation 2216. Up to 281 conditions per place. [2024-06-27 20:47:10,149 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-27 20:47:10,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 1058 flow [2024-06-27 20:47:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-27 20:47:10,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-27 20:47:10,155 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 802 flow. Second operand 9 states and 120 transitions. [2024-06-27 20:47:10,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 1058 flow [2024-06-27 20:47:10,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 986 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:10,169 INFO L231 Difference]: Finished difference. Result has 99 places, 86 transitions, 788 flow [2024-06-27 20:47:10,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=788, PETRI_PLACES=99, PETRI_TRANSITIONS=86} [2024-06-27 20:47:10,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-27 20:47:10,170 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 86 transitions, 788 flow [2024-06-27 20:47:10,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:10,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:10,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:10,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:47:10,170 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)] === [2024-06-27 20:47:10,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash -115465122, now seen corresponding path program 1 times [2024-06-27 20:47:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358920990] [2024-06-27 20:47:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:10,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:10,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358920990] [2024-06-27 20:47:10,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358920990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:10,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:10,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454948040] [2024-06-27 20:47:10,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:10,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:10,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:10,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:10,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 788 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:10,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:10,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:10,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:11,061 INFO L124 PetriNetUnfolderBase]: 209/410 cut-off events. [2024-06-27 20:47:11,061 INFO L125 PetriNetUnfolderBase]: For 6738/6738 co-relation queries the response was YES. [2024-06-27 20:47:11,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2392 conditions, 410 events. 209/410 cut-off events. For 6738/6738 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1795 event pairs, 32 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 2344. Up to 329 conditions per place. [2024-06-27 20:47:11,064 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 89 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-27 20:47:11,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 1076 flow [2024-06-27 20:47:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-27 20:47:11,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-27 20:47:11,065 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 788 flow. Second operand 9 states and 120 transitions. [2024-06-27 20:47:11,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 1076 flow [2024-06-27 20:47:11,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 955 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:11,075 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 748 flow [2024-06-27 20:47:11,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=748, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2024-06-27 20:47:11,075 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-27 20:47:11,076 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 748 flow [2024-06-27 20:47:11,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:11,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:11,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:11,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:47:11,076 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)] === [2024-06-27 20:47:11,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1125540898, now seen corresponding path program 2 times [2024-06-27 20:47:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:11,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723923306] [2024-06-27 20:47:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:11,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:11,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:11,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723923306] [2024-06-27 20:47:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723923306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716074447] [2024-06-27 20:47:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:11,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:11,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:11,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 748 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:11,944 INFO L124 PetriNetUnfolderBase]: 213/418 cut-off events. [2024-06-27 20:47:11,944 INFO L125 PetriNetUnfolderBase]: For 6375/6375 co-relation queries the response was YES. [2024-06-27 20:47:11,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 418 events. 213/418 cut-off events. For 6375/6375 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1847 event pairs, 13 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 2281. Up to 311 conditions per place. [2024-06-27 20:47:11,948 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 86 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-27 20:47:11,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 106 transitions, 1002 flow [2024-06-27 20:47:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-27 20:47:11,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-27 20:47:11,950 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 748 flow. Second operand 8 states and 106 transitions. [2024-06-27 20:47:11,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 106 transitions, 1002 flow [2024-06-27 20:47:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 968 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:11,959 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 766 flow [2024-06-27 20:47:11,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=766, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2024-06-27 20:47:11,959 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-27 20:47:11,959 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 766 flow [2024-06-27 20:47:11,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:11,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:11,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:11,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:47:11,960 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)] === [2024-06-27 20:47:11,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:11,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1272353170, now seen corresponding path program 3 times [2024-06-27 20:47:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:11,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057898386] [2024-06-27 20:47:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:11,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057898386] [2024-06-27 20:47:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057898386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:12,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:12,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329096495] [2024-06-27 20:47:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:12,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:12,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:12,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:12,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:12,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:12,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 766 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:12,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:12,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:12,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:12,742 INFO L124 PetriNetUnfolderBase]: 217/426 cut-off events. [2024-06-27 20:47:12,743 INFO L125 PetriNetUnfolderBase]: For 6927/6927 co-relation queries the response was YES. [2024-06-27 20:47:12,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 426 events. 217/426 cut-off events. For 6927/6927 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1893 event pairs, 35 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 2351. Up to 352 conditions per place. [2024-06-27 20:47:12,746 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 87 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-27 20:47:12,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 1020 flow [2024-06-27 20:47:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-27 20:47:12,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-27 20:47:12,747 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 766 flow. Second operand 8 states and 107 transitions. [2024-06-27 20:47:12,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 1020 flow [2024-06-27 20:47:12,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 978 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:12,756 INFO L231 Difference]: Finished difference. Result has 106 places, 93 transitions, 774 flow [2024-06-27 20:47:12,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=774, PETRI_PLACES=106, PETRI_TRANSITIONS=93} [2024-06-27 20:47:12,757 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-27 20:47:12,757 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 93 transitions, 774 flow [2024-06-27 20:47:12,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:12,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:12,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:12,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:47:12,758 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)] === [2024-06-27 20:47:12,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1315848864, now seen corresponding path program 1 times [2024-06-27 20:47:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020233339] [2024-06-27 20:47:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:12,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:13,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020233339] [2024-06-27 20:47:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020233339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:13,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:13,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:13,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676511968] [2024-06-27 20:47:13,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:13,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:13,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:13,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:13,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 93 transitions, 774 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:13,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:13,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:13,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:14,068 INFO L124 PetriNetUnfolderBase]: 223/440 cut-off events. [2024-06-27 20:47:14,068 INFO L125 PetriNetUnfolderBase]: For 7203/7203 co-relation queries the response was YES. [2024-06-27 20:47:14,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 440 events. 223/440 cut-off events. For 7203/7203 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1985 event pairs, 33 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 2417. Up to 359 conditions per place. [2024-06-27 20:47:14,072 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 87 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-27 20:47:14,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 109 transitions, 1062 flow [2024-06-27 20:47:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:14,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-27 20:47:14,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-27 20:47:14,074 INFO L175 Difference]: Start difference. First operand has 106 places, 93 transitions, 774 flow. Second operand 9 states and 119 transitions. [2024-06-27 20:47:14,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 109 transitions, 1062 flow [2024-06-27 20:47:14,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 1024 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:14,084 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 815 flow [2024-06-27 20:47:14,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=815, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2024-06-27 20:47:14,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-27 20:47:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 815 flow [2024-06-27 20:47:14,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:14,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:14,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:14,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:47:14,090 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)] === [2024-06-27 20:47:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1034923520, now seen corresponding path program 4 times [2024-06-27 20:47:14,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:14,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433630578] [2024-06-27 20:47:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:14,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:14,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:14,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433630578] [2024-06-27 20:47:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433630578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:14,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:14,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:14,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310022832] [2024-06-27 20:47:14,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:14,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:14,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:14,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:14,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:14,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:14,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:14,949 INFO L124 PetriNetUnfolderBase]: 227/448 cut-off events. [2024-06-27 20:47:14,949 INFO L125 PetriNetUnfolderBase]: For 7795/7795 co-relation queries the response was YES. [2024-06-27 20:47:14,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 448 events. 227/448 cut-off events. For 7795/7795 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2025 event pairs, 36 based on Foata normal form. 2/449 useless extension candidates. Maximal degree in co-relation 2490. Up to 375 conditions per place. [2024-06-27 20:47:14,955 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 90 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-27 20:47:14,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 110 transitions, 1115 flow [2024-06-27 20:47:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-27 20:47:14,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:14,956 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 815 flow. Second operand 8 states and 104 transitions. [2024-06-27 20:47:14,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 110 transitions, 1115 flow [2024-06-27 20:47:14,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 110 transitions, 1054 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:14,967 INFO L231 Difference]: Finished difference. Result has 111 places, 99 transitions, 858 flow [2024-06-27 20:47:14,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=111, PETRI_TRANSITIONS=99} [2024-06-27 20:47:14,969 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-27 20:47:14,969 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 99 transitions, 858 flow [2024-06-27 20:47:14,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:14,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:14,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:14,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:47:14,970 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)] === [2024-06-27 20:47:14,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1028482960, now seen corresponding path program 2 times [2024-06-27 20:47:14,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:14,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604656825] [2024-06-27 20:47:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:14,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604656825] [2024-06-27 20:47:15,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604656825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:15,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504456867] [2024-06-27 20:47:15,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:15,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:15,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:15,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 99 transitions, 858 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:15,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:15,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:15,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:16,067 INFO L124 PetriNetUnfolderBase]: 243/476 cut-off events. [2024-06-27 20:47:16,067 INFO L125 PetriNetUnfolderBase]: For 9378/9378 co-relation queries the response was YES. [2024-06-27 20:47:16,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2803 conditions, 476 events. 243/476 cut-off events. For 9378/9378 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2177 event pairs, 37 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 2748. Up to 359 conditions per place. [2024-06-27 20:47:16,070 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 83 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-27 20:47:16,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 1260 flow [2024-06-27 20:47:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-27 20:47:16,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-27 20:47:16,072 INFO L175 Difference]: Start difference. First operand has 111 places, 99 transitions, 858 flow. Second operand 9 states and 121 transitions. [2024-06-27 20:47:16,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 1260 flow [2024-06-27 20:47:16,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 117 transitions, 1203 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:16,086 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 958 flow [2024-06-27 20:47:16,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=958, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2024-06-27 20:47:16,086 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-27 20:47:16,087 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 958 flow [2024-06-27 20:47:16,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:16,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:16,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:16,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:47:16,087 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)] === [2024-06-27 20:47:16,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1028489470, now seen corresponding path program 3 times [2024-06-27 20:47:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:16,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386018087] [2024-06-27 20:47:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:16,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:16,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:16,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386018087] [2024-06-27 20:47:16,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386018087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:16,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:16,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546784570] [2024-06-27 20:47:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:16,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:16,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:16,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:16,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:16,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 958 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:16,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:16,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:16,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:17,279 INFO L124 PetriNetUnfolderBase]: 241/473 cut-off events. [2024-06-27 20:47:17,279 INFO L125 PetriNetUnfolderBase]: For 9210/9210 co-relation queries the response was YES. [2024-06-27 20:47:17,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 473 events. 241/473 cut-off events. For 9210/9210 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2155 event pairs, 37 based on Foata normal form. 1/473 useless extension candidates. Maximal degree in co-relation 2746. Up to 358 conditions per place. [2024-06-27 20:47:17,282 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-27 20:47:17,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 118 transitions, 1310 flow [2024-06-27 20:47:17,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-27 20:47:17,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-27 20:47:17,283 INFO L175 Difference]: Start difference. First operand has 115 places, 104 transitions, 958 flow. Second operand 9 states and 122 transitions. [2024-06-27 20:47:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 118 transitions, 1310 flow [2024-06-27 20:47:17,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 1238 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:17,296 INFO L231 Difference]: Finished difference. Result has 119 places, 106 transitions, 995 flow [2024-06-27 20:47:17,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2024-06-27 20:47:17,297 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-27 20:47:17,297 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 995 flow [2024-06-27 20:47:17,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:17,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:17,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:17,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:47:17,298 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)] === [2024-06-27 20:47:17,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:17,298 INFO L85 PathProgramCache]: Analyzing trace with hash -835073506, now seen corresponding path program 1 times [2024-06-27 20:47:17,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:17,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497133799] [2024-06-27 20:47:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:17,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:18,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:18,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497133799] [2024-06-27 20:47:18,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497133799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:18,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:18,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985282648] [2024-06-27 20:47:18,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:18,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:18,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:18,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:18,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:18,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 995 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:18,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:18,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:18,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:18,389 INFO L124 PetriNetUnfolderBase]: 261/517 cut-off events. [2024-06-27 20:47:18,389 INFO L125 PetriNetUnfolderBase]: For 13920/13920 co-relation queries the response was YES. [2024-06-27 20:47:18,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 517 events. 261/517 cut-off events. For 13920/13920 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2427 event pairs, 41 based on Foata normal form. 12/528 useless extension candidates. Maximal degree in co-relation 2991. Up to 374 conditions per place. [2024-06-27 20:47:18,409 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 89 selfloop transitions, 24 changer transitions 6/123 dead transitions. [2024-06-27 20:47:18,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 123 transitions, 1343 flow [2024-06-27 20:47:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-27 20:47:18,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-27 20:47:18,413 INFO L175 Difference]: Start difference. First operand has 119 places, 106 transitions, 995 flow. Second operand 9 states and 123 transitions. [2024-06-27 20:47:18,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 123 transitions, 1343 flow [2024-06-27 20:47:18,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 1269 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:18,430 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 974 flow [2024-06-27 20:47:18,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=974, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2024-06-27 20:47:18,431 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-27 20:47:18,431 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 974 flow [2024-06-27 20:47:18,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:18,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:18,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:18,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:47:18,432 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)] === [2024-06-27 20:47:18,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:18,432 INFO L85 PathProgramCache]: Analyzing trace with hash 887993790, now seen corresponding path program 5 times [2024-06-27 20:47:18,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:18,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667141673] [2024-06-27 20:47:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:18,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667141673] [2024-06-27 20:47:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667141673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:19,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:19,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:19,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446427468] [2024-06-27 20:47:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:19,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:19,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:19,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:19,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 974 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:19,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:19,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:19,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:19,334 INFO L124 PetriNetUnfolderBase]: 246/490 cut-off events. [2024-06-27 20:47:19,334 INFO L125 PetriNetUnfolderBase]: For 10037/10037 co-relation queries the response was YES. [2024-06-27 20:47:19,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 490 events. 246/490 cut-off events. For 10037/10037 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2299 event pairs, 43 based on Foata normal form. 2/489 useless extension candidates. Maximal degree in co-relation 2802. Up to 410 conditions per place. [2024-06-27 20:47:19,339 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 92 selfloop transitions, 20 changer transitions 0/116 dead transitions. [2024-06-27 20:47:19,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 1255 flow [2024-06-27 20:47:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-27 20:47:19,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:19,340 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 974 flow. Second operand 8 states and 104 transitions. [2024-06-27 20:47:19,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 1255 flow [2024-06-27 20:47:19,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 116 transitions, 1197 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:19,357 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 998 flow [2024-06-27 20:47:19,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=998, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2024-06-27 20:47:19,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-27 20:47:19,357 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 998 flow [2024-06-27 20:47:19,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:19,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:19,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:19,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:47:19,358 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)] === [2024-06-27 20:47:19,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 256015568, now seen corresponding path program 4 times [2024-06-27 20:47:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:19,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320821126] [2024-06-27 20:47:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:20,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:20,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320821126] [2024-06-27 20:47:20,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320821126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:20,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:20,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:20,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344426619] [2024-06-27 20:47:20,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:20,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:20,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:20,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:20,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:20,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 998 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:20,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:20,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:20,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:20,712 INFO L124 PetriNetUnfolderBase]: 259/513 cut-off events. [2024-06-27 20:47:20,712 INFO L125 PetriNetUnfolderBase]: For 11439/11439 co-relation queries the response was YES. [2024-06-27 20:47:20,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 513 events. 259/513 cut-off events. For 11439/11439 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2426 event pairs, 42 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 3044. Up to 354 conditions per place. [2024-06-27 20:47:20,715 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 78 selfloop transitions, 46 changer transitions 0/128 dead transitions. [2024-06-27 20:47:20,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 128 transitions, 1621 flow [2024-06-27 20:47:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-27 20:47:20,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:47:20,719 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 998 flow. Second operand 9 states and 124 transitions. [2024-06-27 20:47:20,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 128 transitions, 1621 flow [2024-06-27 20:47:20,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 128 transitions, 1529 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:20,738 INFO L231 Difference]: Finished difference. Result has 128 places, 116 transitions, 1198 flow [2024-06-27 20:47:20,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1198, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2024-06-27 20:47:20,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-27 20:47:20,738 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 1198 flow [2024-06-27 20:47:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:20,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:20,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:20,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:47:20,739 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)] === [2024-06-27 20:47:20,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 250757506, now seen corresponding path program 5 times [2024-06-27 20:47:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551155128] [2024-06-27 20:47:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:20,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:21,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:21,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551155128] [2024-06-27 20:47:21,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551155128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:21,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:21,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290009011] [2024-06-27 20:47:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:21,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:21,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:21,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 1198 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:21,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:21,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:21,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:22,166 INFO L124 PetriNetUnfolderBase]: 257/510 cut-off events. [2024-06-27 20:47:22,166 INFO L125 PetriNetUnfolderBase]: For 11755/11755 co-relation queries the response was YES. [2024-06-27 20:47:22,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 510 events. 257/510 cut-off events. For 11755/11755 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2432 event pairs, 40 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 3069. Up to 352 conditions per place. [2024-06-27 20:47:22,169 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 50 changer transitions 0/129 dead transitions. [2024-06-27 20:47:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 129 transitions, 1621 flow [2024-06-27 20:47:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-27 20:47:22,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-27 20:47:22,171 INFO L175 Difference]: Start difference. First operand has 128 places, 116 transitions, 1198 flow. Second operand 10 states and 132 transitions. [2024-06-27 20:47:22,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 129 transitions, 1621 flow [2024-06-27 20:47:22,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1523 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 20:47:22,204 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 1230 flow [2024-06-27 20:47:22,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1230, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2024-06-27 20:47:22,205 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-27 20:47:22,205 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 1230 flow [2024-06-27 20:47:22,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:22,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:22,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:22,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:47:22,206 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)] === [2024-06-27 20:47:22,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:22,206 INFO L85 PathProgramCache]: Analyzing trace with hash 555875652, now seen corresponding path program 6 times [2024-06-27 20:47:22,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:22,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468752683] [2024-06-27 20:47:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:22,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:23,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:23,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468752683] [2024-06-27 20:47:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468752683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:23,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:23,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061954960] [2024-06-27 20:47:23,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:23,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:23,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 1230 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:23,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:23,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:23,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:23,636 INFO L124 PetriNetUnfolderBase]: 270/537 cut-off events. [2024-06-27 20:47:23,637 INFO L125 PetriNetUnfolderBase]: For 13661/13661 co-relation queries the response was YES. [2024-06-27 20:47:23,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 537 events. 270/537 cut-off events. For 13661/13661 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2591 event pairs, 42 based on Foata normal form. 1/535 useless extension candidates. Maximal degree in co-relation 3391. Up to 416 conditions per place. [2024-06-27 20:47:23,640 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 94 selfloop transitions, 36 changer transitions 0/134 dead transitions. [2024-06-27 20:47:23,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 134 transitions, 1778 flow [2024-06-27 20:47:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-27 20:47:23,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-27 20:47:23,643 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 1230 flow. Second operand 9 states and 123 transitions. [2024-06-27 20:47:23,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 134 transitions, 1778 flow [2024-06-27 20:47:23,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1685 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:23,667 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 1356 flow [2024-06-27 20:47:23,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1356, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2024-06-27 20:47:23,668 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-27 20:47:23,668 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 1356 flow [2024-06-27 20:47:23,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:23,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:23,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:23,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:47:23,668 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)] === [2024-06-27 20:47:23,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash 894664990, now seen corresponding path program 7 times [2024-06-27 20:47:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:23,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825353580] [2024-06-27 20:47:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:24,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:24,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825353580] [2024-06-27 20:47:24,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825353580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:24,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:24,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403443399] [2024-06-27 20:47:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:24,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:24,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:24,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:24,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 1356 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:24,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:24,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:24,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:24,913 INFO L124 PetriNetUnfolderBase]: 268/534 cut-off events. [2024-06-27 20:47:24,914 INFO L125 PetriNetUnfolderBase]: For 13953/13953 co-relation queries the response was YES. [2024-06-27 20:47:24,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3412 conditions, 534 events. 268/534 cut-off events. For 13953/13953 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2585 event pairs, 40 based on Foata normal form. 1/533 useless extension candidates. Maximal degree in co-relation 3344. Up to 431 conditions per place. [2024-06-27 20:47:24,917 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 97 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-27 20:47:24,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 133 transitions, 1640 flow [2024-06-27 20:47:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-27 20:47:24,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-27 20:47:24,925 INFO L175 Difference]: Start difference. First operand has 139 places, 124 transitions, 1356 flow. Second operand 10 states and 128 transitions. [2024-06-27 20:47:24,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 133 transitions, 1640 flow [2024-06-27 20:47:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 133 transitions, 1526 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:24,954 INFO L231 Difference]: Finished difference. Result has 144 places, 124 transitions, 1311 flow [2024-06-27 20:47:24,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1311, PETRI_PLACES=144, PETRI_TRANSITIONS=124} [2024-06-27 20:47:24,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-27 20:47:24,954 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 124 transitions, 1311 flow [2024-06-27 20:47:24,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:24,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:24,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:24,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:47:24,955 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)] === [2024-06-27 20:47:24,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash 264289778, now seen corresponding path program 8 times [2024-06-27 20:47:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370221389] [2024-06-27 20:47:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:25,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:25,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370221389] [2024-06-27 20:47:25,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370221389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:25,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:25,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399152654] [2024-06-27 20:47:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:25,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:25,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:25,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 124 transitions, 1311 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:25,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:25,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:25,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:25,994 INFO L124 PetriNetUnfolderBase]: 266/533 cut-off events. [2024-06-27 20:47:25,994 INFO L125 PetriNetUnfolderBase]: For 13553/13553 co-relation queries the response was YES. [2024-06-27 20:47:25,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3313 conditions, 533 events. 266/533 cut-off events. For 13553/13553 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2582 event pairs, 41 based on Foata normal form. 1/533 useless extension candidates. Maximal degree in co-relation 3244. Up to 466 conditions per place. [2024-06-27 20:47:25,997 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2024-06-27 20:47:25,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 132 transitions, 1585 flow [2024-06-27 20:47:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-27 20:47:25,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-27 20:47:25,999 INFO L175 Difference]: Start difference. First operand has 144 places, 124 transitions, 1311 flow. Second operand 9 states and 112 transitions. [2024-06-27 20:47:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 132 transitions, 1585 flow [2024-06-27 20:47:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 132 transitions, 1478 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:26,027 INFO L231 Difference]: Finished difference. Result has 145 places, 124 transitions, 1237 flow [2024-06-27 20:47:26,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1237, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2024-06-27 20:47:26,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-27 20:47:26,028 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 1237 flow [2024-06-27 20:47:26,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:26,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:26,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:26,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:47:26,029 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)] === [2024-06-27 20:47:26,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 894673918, now seen corresponding path program 2 times [2024-06-27 20:47:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896510150] [2024-06-27 20:47:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:26,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:26,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896510150] [2024-06-27 20:47:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896510150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:26,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:26,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:26,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101957162] [2024-06-27 20:47:26,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:26,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:26,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 1237 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:26,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:26,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:26,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:27,191 INFO L124 PetriNetUnfolderBase]: 286/575 cut-off events. [2024-06-27 20:47:27,191 INFO L125 PetriNetUnfolderBase]: For 20990/20990 co-relation queries the response was YES. [2024-06-27 20:47:27,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 575 events. 286/575 cut-off events. For 20990/20990 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2835 event pairs, 46 based on Foata normal form. 12/584 useless extension candidates. Maximal degree in co-relation 3427. Up to 427 conditions per place. [2024-06-27 20:47:27,195 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 102 selfloop transitions, 26 changer transitions 6/138 dead transitions. [2024-06-27 20:47:27,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 138 transitions, 1613 flow [2024-06-27 20:47:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-27 20:47:27,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-27 20:47:27,196 INFO L175 Difference]: Start difference. First operand has 145 places, 124 transitions, 1237 flow. Second operand 9 states and 123 transitions. [2024-06-27 20:47:27,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 138 transitions, 1613 flow [2024-06-27 20:47:27,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 138 transitions, 1566 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:27,226 INFO L231 Difference]: Finished difference. Result has 145 places, 123 transitions, 1253 flow [2024-06-27 20:47:27,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1253, PETRI_PLACES=145, PETRI_TRANSITIONS=123} [2024-06-27 20:47:27,227 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-27 20:47:27,227 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 123 transitions, 1253 flow [2024-06-27 20:47:27,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:27,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:27,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:27,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:47:27,228 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)] === [2024-06-27 20:47:27,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash 256255136, now seen corresponding path program 3 times [2024-06-27 20:47:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:27,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205069836] [2024-06-27 20:47:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:27,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:28,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:28,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205069836] [2024-06-27 20:47:28,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205069836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:28,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:28,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:28,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277884771] [2024-06-27 20:47:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:28,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:28,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:28,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:28,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 123 transitions, 1253 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:28,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:28,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:28,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:28,531 INFO L124 PetriNetUnfolderBase]: 278/563 cut-off events. [2024-06-27 20:47:28,532 INFO L125 PetriNetUnfolderBase]: For 16457/16457 co-relation queries the response was YES. [2024-06-27 20:47:28,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 563 events. 278/563 cut-off events. For 16457/16457 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2805 event pairs, 44 based on Foata normal form. 2/563 useless extension candidates. Maximal degree in co-relation 3430. Up to 423 conditions per place. [2024-06-27 20:47:28,535 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-27 20:47:28,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 135 transitions, 1573 flow [2024-06-27 20:47:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-27 20:47:28,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-27 20:47:28,536 INFO L175 Difference]: Start difference. First operand has 145 places, 123 transitions, 1253 flow. Second operand 11 states and 140 transitions. [2024-06-27 20:47:28,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 135 transitions, 1573 flow [2024-06-27 20:47:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 135 transitions, 1507 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:28,566 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 1305 flow [2024-06-27 20:47:28,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1305, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2024-06-27 20:47:28,567 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-27 20:47:28,567 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 1305 flow [2024-06-27 20:47:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:28,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:28,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:28,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:47:28,568 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)] === [2024-06-27 20:47:28,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash 541355006, now seen corresponding path program 4 times [2024-06-27 20:47:28,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135615550] [2024-06-27 20:47:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:28,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:29,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:29,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135615550] [2024-06-27 20:47:29,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135615550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:29,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:29,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:29,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659120304] [2024-06-27 20:47:29,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:29,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:29,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:29,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:29,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 1305 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:29,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:30,140 INFO L124 PetriNetUnfolderBase]: 285/582 cut-off events. [2024-06-27 20:47:30,140 INFO L125 PetriNetUnfolderBase]: For 17496/17496 co-relation queries the response was YES. [2024-06-27 20:47:30,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3630 conditions, 582 events. 285/582 cut-off events. For 17496/17496 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2919 event pairs, 47 based on Foata normal form. 2/583 useless extension candidates. Maximal degree in co-relation 3558. Up to 505 conditions per place. [2024-06-27 20:47:30,144 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-27 20:47:30,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 138 transitions, 1645 flow [2024-06-27 20:47:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:30,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-27 20:47:30,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:47:30,164 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 1305 flow. Second operand 11 states and 132 transitions. [2024-06-27 20:47:30,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 138 transitions, 1645 flow [2024-06-27 20:47:30,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 138 transitions, 1531 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-27 20:47:30,198 INFO L231 Difference]: Finished difference. Result has 151 places, 128 transitions, 1288 flow [2024-06-27 20:47:30,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1288, PETRI_PLACES=151, PETRI_TRANSITIONS=128} [2024-06-27 20:47:30,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-27 20:47:30,200 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 128 transitions, 1288 flow [2024-06-27 20:47:30,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:30,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:30,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:30,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:47:30,200 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)] === [2024-06-27 20:47:30,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash 551830526, now seen corresponding path program 5 times [2024-06-27 20:47:30,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:30,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880197085] [2024-06-27 20:47:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:30,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:31,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880197085] [2024-06-27 20:47:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880197085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:31,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:31,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:31,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428204777] [2024-06-27 20:47:31,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:31,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:31,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:31,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:31,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 128 transitions, 1288 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:31,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:31,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:31,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:31,487 INFO L124 PetriNetUnfolderBase]: 289/592 cut-off events. [2024-06-27 20:47:31,487 INFO L125 PetriNetUnfolderBase]: For 18193/18193 co-relation queries the response was YES. [2024-06-27 20:47:31,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 592 events. 289/592 cut-off events. For 18193/18193 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3002 event pairs, 45 based on Foata normal form. 2/593 useless extension candidates. Maximal degree in co-relation 3562. Up to 484 conditions per place. [2024-06-27 20:47:31,491 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 116 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-27 20:47:31,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 142 transitions, 1700 flow [2024-06-27 20:47:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-27 20:47:31,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-27 20:47:31,492 INFO L175 Difference]: Start difference. First operand has 151 places, 128 transitions, 1288 flow. Second operand 11 states and 136 transitions. [2024-06-27 20:47:31,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 142 transitions, 1700 flow [2024-06-27 20:47:31,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 142 transitions, 1641 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:31,530 INFO L231 Difference]: Finished difference. Result has 155 places, 129 transitions, 1309 flow [2024-06-27 20:47:31,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1309, PETRI_PLACES=155, PETRI_TRANSITIONS=129} [2024-06-27 20:47:31,533 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-27 20:47:31,534 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 129 transitions, 1309 flow [2024-06-27 20:47:31,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:31,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:31,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:31,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:47:31,537 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)] === [2024-06-27 20:47:31,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash 551474336, now seen corresponding path program 6 times [2024-06-27 20:47:31,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:31,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632822988] [2024-06-27 20:47:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:31,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:32,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632822988] [2024-06-27 20:47:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632822988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:32,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:32,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638914196] [2024-06-27 20:47:32,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:32,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:32,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:32,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 129 transitions, 1309 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:32,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:32,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:32,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:32,597 INFO L124 PetriNetUnfolderBase]: 286/585 cut-off events. [2024-06-27 20:47:32,597 INFO L125 PetriNetUnfolderBase]: For 17118/17118 co-relation queries the response was YES. [2024-06-27 20:47:32,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 585 events. 286/585 cut-off events. For 17118/17118 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2950 event pairs, 46 based on Foata normal form. 2/586 useless extension candidates. Maximal degree in co-relation 3427. Up to 496 conditions per place. [2024-06-27 20:47:32,601 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 115 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-27 20:47:32,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 138 transitions, 1597 flow [2024-06-27 20:47:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-27 20:47:32,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-27 20:47:32,617 INFO L175 Difference]: Start difference. First operand has 155 places, 129 transitions, 1309 flow. Second operand 9 states and 114 transitions. [2024-06-27 20:47:32,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 138 transitions, 1597 flow [2024-06-27 20:47:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 138 transitions, 1487 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-06-27 20:47:32,652 INFO L231 Difference]: Finished difference. Result has 153 places, 129 transitions, 1243 flow [2024-06-27 20:47:32,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1243, PETRI_PLACES=153, PETRI_TRANSITIONS=129} [2024-06-27 20:47:32,654 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-27 20:47:32,654 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 129 transitions, 1243 flow [2024-06-27 20:47:32,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:32,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:32,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:32,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:47:32,655 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)] === [2024-06-27 20:47:32,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1164256147, now seen corresponding path program 1 times [2024-06-27 20:47:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:32,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394199687] [2024-06-27 20:47:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:33,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:33,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394199687] [2024-06-27 20:47:33,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394199687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:33,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:33,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:33,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239775184] [2024-06-27 20:47:33,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:33,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:33,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:33,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:33,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:33,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 129 transitions, 1243 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:33,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:33,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:33,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:33,810 INFO L124 PetriNetUnfolderBase]: 290/593 cut-off events. [2024-06-27 20:47:33,810 INFO L125 PetriNetUnfolderBase]: For 16876/16876 co-relation queries the response was YES. [2024-06-27 20:47:33,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 593 events. 290/593 cut-off events. For 16876/16876 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3000 event pairs, 40 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 3337. Up to 500 conditions per place. [2024-06-27 20:47:33,814 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 117 selfloop transitions, 20 changer transitions 2/143 dead transitions. [2024-06-27 20:47:33,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 143 transitions, 1577 flow [2024-06-27 20:47:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:47:33,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-27 20:47:33,815 INFO L175 Difference]: Start difference. First operand has 153 places, 129 transitions, 1243 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:47:33,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 143 transitions, 1577 flow [2024-06-27 20:47:33,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 143 transitions, 1535 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:33,851 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 1266 flow [2024-06-27 20:47:33,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1266, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2024-06-27 20:47:33,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-27 20:47:33,852 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 1266 flow [2024-06-27 20:47:33,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:33,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:33,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:33,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:47:33,853 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)] === [2024-06-27 20:47:33,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1164404017, now seen corresponding path program 2 times [2024-06-27 20:47:33,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:33,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700165469] [2024-06-27 20:47:33,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:33,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:34,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700165469] [2024-06-27 20:47:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700165469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:34,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789545100] [2024-06-27 20:47:34,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:34,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:34,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:34,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:34,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 1266 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:34,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:34,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:34,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:34,950 INFO L124 PetriNetUnfolderBase]: 280/569 cut-off events. [2024-06-27 20:47:34,950 INFO L125 PetriNetUnfolderBase]: For 16361/16361 co-relation queries the response was YES. [2024-06-27 20:47:34,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3304 conditions, 569 events. 280/569 cut-off events. For 16361/16361 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2835 event pairs, 36 based on Foata normal form. 2/570 useless extension candidates. Maximal degree in co-relation 3231. Up to 476 conditions per place. [2024-06-27 20:47:34,954 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 120 selfloop transitions, 19 changer transitions 0/143 dead transitions. [2024-06-27 20:47:34,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 143 transitions, 1584 flow [2024-06-27 20:47:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:47:34,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-27 20:47:34,969 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 1266 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:47:34,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 143 transitions, 1584 flow [2024-06-27 20:47:35,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 143 transitions, 1535 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:35,007 INFO L231 Difference]: Finished difference. Result has 158 places, 131 transitions, 1273 flow [2024-06-27 20:47:35,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1273, PETRI_PLACES=158, PETRI_TRANSITIONS=131} [2024-06-27 20:47:35,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-27 20:47:35,007 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 131 transitions, 1273 flow [2024-06-27 20:47:35,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:35,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:35,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:47:35,009 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)] === [2024-06-27 20:47:35,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash -125108499, now seen corresponding path program 3 times [2024-06-27 20:47:35,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:35,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159652948] [2024-06-27 20:47:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:35,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:35,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159652948] [2024-06-27 20:47:35,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159652948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:35,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:35,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:35,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667449241] [2024-06-27 20:47:35,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:35,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:35,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:35,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 131 transitions, 1273 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:35,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:35,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:35,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:36,141 INFO L124 PetriNetUnfolderBase]: 284/577 cut-off events. [2024-06-27 20:47:36,141 INFO L125 PetriNetUnfolderBase]: For 17319/17319 co-relation queries the response was YES. [2024-06-27 20:47:36,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3347 conditions, 577 events. 284/577 cut-off events. For 17319/17319 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2891 event pairs, 40 based on Foata normal form. 2/578 useless extension candidates. Maximal degree in co-relation 3273. Up to 477 conditions per place. [2024-06-27 20:47:36,145 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 114 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-06-27 20:47:36,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 143 transitions, 1591 flow [2024-06-27 20:47:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:47:36,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:36,146 INFO L175 Difference]: Start difference. First operand has 158 places, 131 transitions, 1273 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:47:36,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 143 transitions, 1591 flow [2024-06-27 20:47:36,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 143 transitions, 1545 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:36,185 INFO L231 Difference]: Finished difference. Result has 160 places, 132 transitions, 1297 flow [2024-06-27 20:47:36,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1297, PETRI_PLACES=160, PETRI_TRANSITIONS=132} [2024-06-27 20:47:36,185 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-27 20:47:36,185 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 132 transitions, 1297 flow [2024-06-27 20:47:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:36,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:36,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:47:36,186 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)] === [2024-06-27 20:47:36,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1697670315, now seen corresponding path program 4 times [2024-06-27 20:47:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:36,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948363971] [2024-06-27 20:47:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948363971] [2024-06-27 20:47:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948363971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:36,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:36,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:36,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315503129] [2024-06-27 20:47:36,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:36,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:36,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:36,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:36,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 132 transitions, 1297 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:36,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:36,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:36,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:37,200 INFO L124 PetriNetUnfolderBase]: 288/585 cut-off events. [2024-06-27 20:47:37,200 INFO L125 PetriNetUnfolderBase]: For 17985/17985 co-relation queries the response was YES. [2024-06-27 20:47:37,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3410 conditions, 585 events. 288/585 cut-off events. For 17985/17985 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2938 event pairs, 31 based on Foata normal form. 2/586 useless extension candidates. Maximal degree in co-relation 3335. Up to 450 conditions per place. [2024-06-27 20:47:37,204 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 125 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-27 20:47:37,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 148 transitions, 1637 flow [2024-06-27 20:47:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:47:37,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:37,221 INFO L175 Difference]: Start difference. First operand has 160 places, 132 transitions, 1297 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:47:37,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 148 transitions, 1637 flow [2024-06-27 20:47:37,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 148 transitions, 1577 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:37,266 INFO L231 Difference]: Finished difference. Result has 162 places, 133 transitions, 1298 flow [2024-06-27 20:47:37,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1298, PETRI_PLACES=162, PETRI_TRANSITIONS=133} [2024-06-27 20:47:37,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2024-06-27 20:47:37,267 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 133 transitions, 1298 flow [2024-06-27 20:47:37,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:37,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:37,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:37,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:47:37,267 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)] === [2024-06-27 20:47:37,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash -443462991, now seen corresponding path program 5 times [2024-06-27 20:47:37,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:37,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137355877] [2024-06-27 20:47:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:37,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:38,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:38,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137355877] [2024-06-27 20:47:38,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137355877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:38,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:38,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998831293] [2024-06-27 20:47:38,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:38,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:38,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:38,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 133 transitions, 1298 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:38,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:38,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:38,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:38,466 INFO L124 PetriNetUnfolderBase]: 292/593 cut-off events. [2024-06-27 20:47:38,466 INFO L125 PetriNetUnfolderBase]: For 19013/19013 co-relation queries the response was YES. [2024-06-27 20:47:38,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 593 events. 292/593 cut-off events. For 19013/19013 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2984 event pairs, 37 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 3387. Up to 495 conditions per place. [2024-06-27 20:47:38,470 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 126 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-27 20:47:38,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 148 transitions, 1638 flow [2024-06-27 20:47:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-27 20:47:38,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-27 20:47:38,474 INFO L175 Difference]: Start difference. First operand has 162 places, 133 transitions, 1298 flow. Second operand 9 states and 118 transitions. [2024-06-27 20:47:38,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 148 transitions, 1638 flow [2024-06-27 20:47:38,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 148 transitions, 1589 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:38,518 INFO L231 Difference]: Finished difference. Result has 164 places, 134 transitions, 1309 flow [2024-06-27 20:47:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=164, PETRI_TRANSITIONS=134} [2024-06-27 20:47:38,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-27 20:47:38,518 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 134 transitions, 1309 flow [2024-06-27 20:47:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:38,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:38,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:38,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:47:38,519 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)] === [2024-06-27 20:47:38,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash -443315121, now seen corresponding path program 6 times [2024-06-27 20:47:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:38,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015670773] [2024-06-27 20:47:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:38,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015670773] [2024-06-27 20:47:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015670773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438663827] [2024-06-27 20:47:39,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:39,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:39,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:39,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 134 transitions, 1309 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:39,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:39,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:39,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:39,970 INFO L124 PetriNetUnfolderBase]: 296/601 cut-off events. [2024-06-27 20:47:39,970 INFO L125 PetriNetUnfolderBase]: For 19918/19918 co-relation queries the response was YES. [2024-06-27 20:47:39,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 601 events. 296/601 cut-off events. For 19918/19918 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3054 event pairs, 39 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 3437. Up to 508 conditions per place. [2024-06-27 20:47:39,973 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 125 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-27 20:47:39,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 148 transitions, 1649 flow [2024-06-27 20:47:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-27 20:47:39,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-27 20:47:39,974 INFO L175 Difference]: Start difference. First operand has 164 places, 134 transitions, 1309 flow. Second operand 9 states and 118 transitions. [2024-06-27 20:47:39,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 148 transitions, 1649 flow [2024-06-27 20:47:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 148 transitions, 1599 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:40,021 INFO L231 Difference]: Finished difference. Result has 166 places, 135 transitions, 1323 flow [2024-06-27 20:47:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1323, PETRI_PLACES=166, PETRI_TRANSITIONS=135} [2024-06-27 20:47:40,021 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-27 20:47:40,022 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 135 transitions, 1323 flow [2024-06-27 20:47:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:40,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:40,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:47:40,022 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)] === [2024-06-27 20:47:40,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash -117750897, now seen corresponding path program 1 times [2024-06-27 20:47:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:40,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521333258] [2024-06-27 20:47:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:41,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:41,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521333258] [2024-06-27 20:47:41,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521333258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:41,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:41,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515746795] [2024-06-27 20:47:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:41,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:41,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:41,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 135 transitions, 1323 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:41,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:41,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:41,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:41,607 INFO L124 PetriNetUnfolderBase]: 299/606 cut-off events. [2024-06-27 20:47:41,607 INFO L125 PetriNetUnfolderBase]: For 19791/19791 co-relation queries the response was YES. [2024-06-27 20:47:41,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3559 conditions, 606 events. 299/606 cut-off events. For 19791/19791 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3076 event pairs, 42 based on Foata normal form. 1/606 useless extension candidates. Maximal degree in co-relation 3481. Up to 498 conditions per place. [2024-06-27 20:47:41,611 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 30 changer transitions 0/148 dead transitions. [2024-06-27 20:47:41,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 148 transitions, 1679 flow [2024-06-27 20:47:41,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-27 20:47:41,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-27 20:47:41,612 INFO L175 Difference]: Start difference. First operand has 166 places, 135 transitions, 1323 flow. Second operand 10 states and 129 transitions. [2024-06-27 20:47:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 148 transitions, 1679 flow [2024-06-27 20:47:41,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 148 transitions, 1625 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:41,659 INFO L231 Difference]: Finished difference. Result has 169 places, 137 transitions, 1380 flow [2024-06-27 20:47:41,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1380, PETRI_PLACES=169, PETRI_TRANSITIONS=137} [2024-06-27 20:47:41,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-27 20:47:41,660 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 137 transitions, 1380 flow [2024-06-27 20:47:41,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:41,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:41,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:47:41,661 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)] === [2024-06-27 20:47:41,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash 216194809, now seen corresponding path program 2 times [2024-06-27 20:47:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:41,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941380612] [2024-06-27 20:47:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:41,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:43,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:43,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941380612] [2024-06-27 20:47:43,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941380612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:43,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:43,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:43,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323011013] [2024-06-27 20:47:43,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:43,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:43,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:43,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:43,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:43,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 137 transitions, 1380 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:43,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:43,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:43,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:43,583 INFO L124 PetriNetUnfolderBase]: 297/603 cut-off events. [2024-06-27 20:47:43,584 INFO L125 PetriNetUnfolderBase]: For 19163/19163 co-relation queries the response was YES. [2024-06-27 20:47:43,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3496 conditions, 603 events. 297/603 cut-off events. For 19163/19163 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3080 event pairs, 42 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 3417. Up to 495 conditions per place. [2024-06-27 20:47:43,588 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 30 changer transitions 0/148 dead transitions. [2024-06-27 20:47:43,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 148 transitions, 1694 flow [2024-06-27 20:47:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 20:47:43,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:43,589 INFO L175 Difference]: Start difference. First operand has 169 places, 137 transitions, 1380 flow. Second operand 10 states and 130 transitions. [2024-06-27 20:47:43,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 148 transitions, 1694 flow [2024-06-27 20:47:43,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 148 transitions, 1564 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:43,638 INFO L231 Difference]: Finished difference. Result has 172 places, 137 transitions, 1315 flow [2024-06-27 20:47:43,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1315, PETRI_PLACES=172, PETRI_TRANSITIONS=137} [2024-06-27 20:47:43,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-27 20:47:43,638 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 137 transitions, 1315 flow [2024-06-27 20:47:43,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:43,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:43,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:43,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:47:43,639 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)] === [2024-06-27 20:47:43,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash -141668553, now seen corresponding path program 7 times [2024-06-27 20:47:43,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:43,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597087415] [2024-06-27 20:47:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:43,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597087415] [2024-06-27 20:47:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597087415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255025758] [2024-06-27 20:47:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:44,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:44,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:44,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:44,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 137 transitions, 1315 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:44,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:44,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:44,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:44,774 INFO L124 PetriNetUnfolderBase]: 301/611 cut-off events. [2024-06-27 20:47:44,774 INFO L125 PetriNetUnfolderBase]: For 21091/21091 co-relation queries the response was YES. [2024-06-27 20:47:44,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 611 events. 301/611 cut-off events. For 21091/21091 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3134 event pairs, 45 based on Foata normal form. 2/611 useless extension candidates. Maximal degree in co-relation 3430. Up to 510 conditions per place. [2024-06-27 20:47:44,778 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 118 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-27 20:47:44,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 147 transitions, 1643 flow [2024-06-27 20:47:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:47:44,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:44,779 INFO L175 Difference]: Start difference. First operand has 172 places, 137 transitions, 1315 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:47:44,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 147 transitions, 1643 flow [2024-06-27 20:47:44,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 147 transitions, 1533 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 20:47:44,826 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1283 flow [2024-06-27 20:47:44,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-06-27 20:47:44,827 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-27 20:47:44,827 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1283 flow [2024-06-27 20:47:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:44,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:44,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:44,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:47:44,828 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)] === [2024-06-27 20:47:44,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1758152303, now seen corresponding path program 8 times [2024-06-27 20:47:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:44,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715283389] [2024-06-27 20:47:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:44,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:45,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:45,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715283389] [2024-06-27 20:47:45,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715283389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:45,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:45,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041948339] [2024-06-27 20:47:45,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:45,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:45,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:45,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:45,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1283 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:45,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:45,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:45,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:45,921 INFO L124 PetriNetUnfolderBase]: 305/619 cut-off events. [2024-06-27 20:47:45,921 INFO L125 PetriNetUnfolderBase]: For 22141/22141 co-relation queries the response was YES. [2024-06-27 20:47:45,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3551 conditions, 619 events. 305/619 cut-off events. For 22141/22141 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3198 event pairs, 43 based on Foata normal form. 2/619 useless extension candidates. Maximal degree in co-relation 3470. Up to 524 conditions per place. [2024-06-27 20:47:45,928 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 122 selfloop transitions, 22 changer transitions 1/149 dead transitions. [2024-06-27 20:47:45,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 149 transitions, 1626 flow [2024-06-27 20:47:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:47:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-27 20:47:45,933 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1283 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:47:45,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 149 transitions, 1626 flow [2024-06-27 20:47:45,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 149 transitions, 1556 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:45,985 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1293 flow [2024-06-27 20:47:45,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-06-27 20:47:45,985 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-27 20:47:45,985 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1293 flow [2024-06-27 20:47:45,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:45,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:45,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:45,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:47:45,986 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)] === [2024-06-27 20:47:45,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:45,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1666667495, now seen corresponding path program 9 times [2024-06-27 20:47:45,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059675300] [2024-06-27 20:47:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:45,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:46,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:46,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059675300] [2024-06-27 20:47:46,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059675300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:46,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:46,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:46,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302967801] [2024-06-27 20:47:46,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:46,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:46,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:46,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:46,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:46,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:46,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1293 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:46,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:46,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:46,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:47,152 INFO L124 PetriNetUnfolderBase]: 297/599 cut-off events. [2024-06-27 20:47:47,153 INFO L125 PetriNetUnfolderBase]: For 22541/22541 co-relation queries the response was YES. [2024-06-27 20:47:47,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3458 conditions, 599 events. 297/599 cut-off events. For 22541/22541 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3068 event pairs, 43 based on Foata normal form. 2/599 useless extension candidates. Maximal degree in co-relation 3375. Up to 472 conditions per place. [2024-06-27 20:47:47,156 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 110 selfloop transitions, 35 changer transitions 0/149 dead transitions. [2024-06-27 20:47:47,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 149 transitions, 1629 flow [2024-06-27 20:47:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:47:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:47,157 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1293 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:47:47,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 149 transitions, 1629 flow [2024-06-27 20:47:47,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 149 transitions, 1559 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:47,210 INFO L231 Difference]: Finished difference. Result has 177 places, 140 transitions, 1325 flow [2024-06-27 20:47:47,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=177, PETRI_TRANSITIONS=140} [2024-06-27 20:47:47,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-27 20:47:47,210 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 140 transitions, 1325 flow [2024-06-27 20:47:47,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:47,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:47,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:47:47,213 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)] === [2024-06-27 20:47:47,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1758004433, now seen corresponding path program 10 times [2024-06-27 20:47:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104630093] [2024-06-27 20:47:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:47,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104630093] [2024-06-27 20:47:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104630093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:47,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:47,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:47:47,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31568740] [2024-06-27 20:47:47,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:47,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:47:47,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:47,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:47:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:47:48,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:48,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 140 transitions, 1325 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:48,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:48,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:48,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:48,257 INFO L124 PetriNetUnfolderBase]: 294/594 cut-off events. [2024-06-27 20:47:48,258 INFO L125 PetriNetUnfolderBase]: For 20686/20686 co-relation queries the response was YES. [2024-06-27 20:47:48,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 594 events. 294/594 cut-off events. For 20686/20686 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3063 event pairs, 40 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 3234. Up to 494 conditions per place. [2024-06-27 20:47:48,261 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 124 selfloop transitions, 22 changer transitions 0/150 dead transitions. [2024-06-27 20:47:48,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 150 transitions, 1639 flow [2024-06-27 20:47:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:47:48,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-27 20:47:48,263 INFO L175 Difference]: Start difference. First operand has 177 places, 140 transitions, 1325 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:47:48,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 150 transitions, 1639 flow [2024-06-27 20:47:48,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 150 transitions, 1547 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:48,328 INFO L231 Difference]: Finished difference. Result has 179 places, 140 transitions, 1281 flow [2024-06-27 20:47:48,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1281, PETRI_PLACES=179, PETRI_TRANSITIONS=140} [2024-06-27 20:47:48,329 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-27 20:47:48,329 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 140 transitions, 1281 flow [2024-06-27 20:47:48,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:48,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:48,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:48,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:47:48,329 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)] === [2024-06-27 20:47:48,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash 59895369, now seen corresponding path program 3 times [2024-06-27 20:47:48,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:48,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203969432] [2024-06-27 20:47:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:48,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:49,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:49,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203969432] [2024-06-27 20:47:49,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203969432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:49,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349006702] [2024-06-27 20:47:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:49,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:49,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 140 transitions, 1281 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:49,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:49,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:49,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:49,924 INFO L124 PetriNetUnfolderBase]: 292/591 cut-off events. [2024-06-27 20:47:49,925 INFO L125 PetriNetUnfolderBase]: For 18516/18516 co-relation queries the response was YES. [2024-06-27 20:47:49,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3191 conditions, 591 events. 292/591 cut-off events. For 18516/18516 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3047 event pairs, 42 based on Foata normal form. 1/590 useless extension candidates. Maximal degree in co-relation 3106. Up to 475 conditions per place. [2024-06-27 20:47:49,928 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 34 changer transitions 0/150 dead transitions. [2024-06-27 20:47:49,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 150 transitions, 1697 flow [2024-06-27 20:47:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-27 20:47:49,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-27 20:47:49,930 INFO L175 Difference]: Start difference. First operand has 179 places, 140 transitions, 1281 flow. Second operand 10 states and 131 transitions. [2024-06-27 20:47:49,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 150 transitions, 1697 flow [2024-06-27 20:47:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 150 transitions, 1569 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:49,986 INFO L231 Difference]: Finished difference. Result has 181 places, 140 transitions, 1226 flow [2024-06-27 20:47:49,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1226, PETRI_PLACES=181, PETRI_TRANSITIONS=140} [2024-06-27 20:47:49,986 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-27 20:47:49,986 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 140 transitions, 1226 flow [2024-06-27 20:47:49,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:49,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:49,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:49,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:47:49,987 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)] === [2024-06-27 20:47:49,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:49,987 INFO L85 PathProgramCache]: Analyzing trace with hash 59628459, now seen corresponding path program 4 times [2024-06-27 20:47:49,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:49,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111071571] [2024-06-27 20:47:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:51,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111071571] [2024-06-27 20:47:51,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111071571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:51,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:51,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:51,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011423910] [2024-06-27 20:47:51,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:51,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:51,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:51,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 140 transitions, 1226 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:51,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:51,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:51,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:51,942 INFO L124 PetriNetUnfolderBase]: 295/594 cut-off events. [2024-06-27 20:47:51,942 INFO L125 PetriNetUnfolderBase]: For 18859/18859 co-relation queries the response was YES. [2024-06-27 20:47:51,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 594 events. 295/594 cut-off events. For 18859/18859 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3043 event pairs, 39 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 3084. Up to 470 conditions per place. [2024-06-27 20:47:51,946 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-27 20:47:51,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 151 transitions, 1588 flow [2024-06-27 20:47:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 20:47:51,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:51,948 INFO L175 Difference]: Start difference. First operand has 181 places, 140 transitions, 1226 flow. Second operand 10 states and 130 transitions. [2024-06-27 20:47:51,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 151 transitions, 1588 flow [2024-06-27 20:47:51,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 151 transitions, 1471 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 20:47:51,992 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1234 flow [2024-06-27 20:47:51,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1234, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-27 20:47:51,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-27 20:47:51,993 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1234 flow [2024-06-27 20:47:51,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:51,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:51,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:47:51,994 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)] === [2024-06-27 20:47:51,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1957460045, now seen corresponding path program 5 times [2024-06-27 20:47:51,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:51,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685076417] [2024-06-27 20:47:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:52,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:52,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685076417] [2024-06-27 20:47:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685076417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:52,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804445897] [2024-06-27 20:47:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:52,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:52,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:53,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:53,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1234 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:53,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:53,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:53,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:53,411 INFO L124 PetriNetUnfolderBase]: 293/593 cut-off events. [2024-06-27 20:47:53,412 INFO L125 PetriNetUnfolderBase]: For 17979/17979 co-relation queries the response was YES. [2024-06-27 20:47:53,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 593 events. 293/593 cut-off events. For 17979/17979 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3060 event pairs, 42 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2954. Up to 477 conditions per place. [2024-06-27 20:47:53,416 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 36 changer transitions 0/151 dead transitions. [2024-06-27 20:47:53,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 151 transitions, 1548 flow [2024-06-27 20:47:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-27 20:47:53,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-27 20:47:53,417 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1234 flow. Second operand 10 states and 132 transitions. [2024-06-27 20:47:53,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 151 transitions, 1548 flow [2024-06-27 20:47:53,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 151 transitions, 1423 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:53,465 INFO L231 Difference]: Finished difference. Result has 183 places, 142 transitions, 1186 flow [2024-06-27 20:47:53,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1186, PETRI_PLACES=183, PETRI_TRANSITIONS=142} [2024-06-27 20:47:53,465 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-27 20:47:53,465 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 142 transitions, 1186 flow [2024-06-27 20:47:53,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:53,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:53,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:53,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:47:53,466 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)] === [2024-06-27 20:47:53,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:53,466 INFO L85 PathProgramCache]: Analyzing trace with hash -84173845, now seen corresponding path program 6 times [2024-06-27 20:47:53,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:53,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140038198] [2024-06-27 20:47:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:53,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:54,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:54,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140038198] [2024-06-27 20:47:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140038198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:54,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:54,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:54,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704263672] [2024-06-27 20:47:54,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:54,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:54,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:54,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 142 transitions, 1186 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:54,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:54,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:54,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:54,838 INFO L124 PetriNetUnfolderBase]: 301/610 cut-off events. [2024-06-27 20:47:54,838 INFO L125 PetriNetUnfolderBase]: For 20201/20201 co-relation queries the response was YES. [2024-06-27 20:47:54,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3189 conditions, 610 events. 301/610 cut-off events. For 20201/20201 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3154 event pairs, 43 based on Foata normal form. 1/610 useless extension candidates. Maximal degree in co-relation 3102. Up to 519 conditions per place. [2024-06-27 20:47:54,843 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 130 selfloop transitions, 23 changer transitions 0/157 dead transitions. [2024-06-27 20:47:54,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 157 transitions, 1716 flow [2024-06-27 20:47:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:47:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:47:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-27 20:47:54,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-27 20:47:54,844 INFO L175 Difference]: Start difference. First operand has 183 places, 142 transitions, 1186 flow. Second operand 11 states and 138 transitions. [2024-06-27 20:47:54,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 157 transitions, 1716 flow [2024-06-27 20:47:54,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 157 transitions, 1630 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:54,904 INFO L231 Difference]: Finished difference. Result has 185 places, 146 transitions, 1247 flow [2024-06-27 20:47:54,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1247, PETRI_PLACES=185, PETRI_TRANSITIONS=146} [2024-06-27 20:47:54,905 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-27 20:47:54,905 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 146 transitions, 1247 flow [2024-06-27 20:47:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:54,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:54,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:54,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:47:54,906 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)] === [2024-06-27 20:47:54,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1409692313, now seen corresponding path program 7 times [2024-06-27 20:47:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573774949] [2024-06-27 20:47:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:56,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:56,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573774949] [2024-06-27 20:47:56,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573774949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:56,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305448483] [2024-06-27 20:47:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:56,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:56,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:56,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:56,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 146 transitions, 1247 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:56,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:56,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:56,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:56,569 INFO L124 PetriNetUnfolderBase]: 304/615 cut-off events. [2024-06-27 20:47:56,569 INFO L125 PetriNetUnfolderBase]: For 21254/21254 co-relation queries the response was YES. [2024-06-27 20:47:56,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 615 events. 304/615 cut-off events. For 21254/21254 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3189 event pairs, 43 based on Foata normal form. 1/615 useless extension candidates. Maximal degree in co-relation 3155. Up to 523 conditions per place. [2024-06-27 20:47:56,573 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-27 20:47:56,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 157 transitions, 1733 flow [2024-06-27 20:47:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-27 20:47:56,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:47:56,575 INFO L175 Difference]: Start difference. First operand has 185 places, 146 transitions, 1247 flow. Second operand 9 states and 117 transitions. [2024-06-27 20:47:56,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 157 transitions, 1733 flow [2024-06-27 20:47:56,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 157 transitions, 1631 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-27 20:47:56,629 INFO L231 Difference]: Finished difference. Result has 185 places, 148 transitions, 1256 flow [2024-06-27 20:47:56,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1256, PETRI_PLACES=185, PETRI_TRANSITIONS=148} [2024-06-27 20:47:56,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-27 20:47:56,630 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 148 transitions, 1256 flow [2024-06-27 20:47:56,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:56,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:56,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:56,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:47:56,631 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)] === [2024-06-27 20:47:56,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -560938097, now seen corresponding path program 8 times [2024-06-27 20:47:56,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:56,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379030637] [2024-06-27 20:47:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:56,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379030637] [2024-06-27 20:47:57,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379030637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:57,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:57,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:57,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311087714] [2024-06-27 20:47:57,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:57,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:57,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 148 transitions, 1256 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:57,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:57,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:57,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:58,145 INFO L124 PetriNetUnfolderBase]: 302/612 cut-off events. [2024-06-27 20:47:58,146 INFO L125 PetriNetUnfolderBase]: For 19918/19918 co-relation queries the response was YES. [2024-06-27 20:47:58,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 612 events. 302/612 cut-off events. For 19918/19918 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3168 event pairs, 43 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 3055. Up to 536 conditions per place. [2024-06-27 20:47:58,149 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 17 changer transitions 0/157 dead transitions. [2024-06-27 20:47:58,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 157 transitions, 1582 flow [2024-06-27 20:47:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:47:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:47:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-27 20:47:58,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-27 20:47:58,150 INFO L175 Difference]: Start difference. First operand has 185 places, 148 transitions, 1256 flow. Second operand 10 states and 123 transitions. [2024-06-27 20:47:58,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 157 transitions, 1582 flow [2024-06-27 20:47:58,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 157 transitions, 1481 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 20:47:58,200 INFO L231 Difference]: Finished difference. Result has 187 places, 148 transitions, 1194 flow [2024-06-27 20:47:58,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1194, PETRI_PLACES=187, PETRI_TRANSITIONS=148} [2024-06-27 20:47:58,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-27 20:47:58,200 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 148 transitions, 1194 flow [2024-06-27 20:47:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:58,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:58,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:47:58,201 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)] === [2024-06-27 20:47:58,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash -809099475, now seen corresponding path program 9 times [2024-06-27 20:47:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009216565] [2024-06-27 20:47:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:59,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:59,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009216565] [2024-06-27 20:47:59,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009216565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:59,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:47:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169373508] [2024-06-27 20:47:59,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:59,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:47:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:47:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:47:59,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:47:59,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 148 transitions, 1194 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:59,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:59,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:47:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:00,175 INFO L124 PetriNetUnfolderBase]: 305/617 cut-off events. [2024-06-27 20:48:00,175 INFO L125 PetriNetUnfolderBase]: For 19266/19266 co-relation queries the response was YES. [2024-06-27 20:48:00,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 617 events. 305/617 cut-off events. For 19266/19266 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3217 event pairs, 42 based on Foata normal form. 1/616 useless extension candidates. Maximal degree in co-relation 3032. Up to 451 conditions per place. [2024-06-27 20:48:00,180 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 50 changer transitions 0/159 dead transitions. [2024-06-27 20:48:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 159 transitions, 1574 flow [2024-06-27 20:48:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-27 20:48:00,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-27 20:48:00,185 INFO L175 Difference]: Start difference. First operand has 187 places, 148 transitions, 1194 flow. Second operand 10 states and 132 transitions. [2024-06-27 20:48:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 159 transitions, 1574 flow [2024-06-27 20:48:00,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 159 transitions, 1529 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:00,240 INFO L231 Difference]: Finished difference. Result has 188 places, 150 transitions, 1308 flow [2024-06-27 20:48:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=188, PETRI_TRANSITIONS=150} [2024-06-27 20:48:00,240 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-27 20:48:00,240 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 150 transitions, 1308 flow [2024-06-27 20:48:00,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:00,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:48:00,241 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)] === [2024-06-27 20:48:00,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash -808832565, now seen corresponding path program 10 times [2024-06-27 20:48:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642296848] [2024-06-27 20:48:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:01,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:01,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642296848] [2024-06-27 20:48:01,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642296848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:01,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:01,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943707993] [2024-06-27 20:48:01,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:01,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:01,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:01,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:01,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:01,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 150 transitions, 1308 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:01,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:01,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:01,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:01,770 INFO L124 PetriNetUnfolderBase]: 308/620 cut-off events. [2024-06-27 20:48:01,771 INFO L125 PetriNetUnfolderBase]: For 20392/20392 co-relation queries the response was YES. [2024-06-27 20:48:01,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 620 events. 308/620 cut-off events. For 20392/20392 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3253 event pairs, 39 based on Foata normal form. 1/617 useless extension candidates. Maximal degree in co-relation 3182. Up to 421 conditions per place. [2024-06-27 20:48:01,775 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-27 20:48:01,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 166 transitions, 1892 flow [2024-06-27 20:48:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-27 20:48:01,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-27 20:48:01,776 INFO L175 Difference]: Start difference. First operand has 188 places, 150 transitions, 1308 flow. Second operand 10 states and 135 transitions. [2024-06-27 20:48:01,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 166 transitions, 1892 flow [2024-06-27 20:48:01,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 166 transitions, 1749 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:01,824 INFO L231 Difference]: Finished difference. Result has 191 places, 156 transitions, 1455 flow [2024-06-27 20:48:01,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1455, PETRI_PLACES=191, PETRI_TRANSITIONS=156} [2024-06-27 20:48:01,824 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-27 20:48:01,824 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 156 transitions, 1455 flow [2024-06-27 20:48:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:01,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:01,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:01,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:48:01,825 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)] === [2024-06-27 20:48:01,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash -653653013, now seen corresponding path program 11 times [2024-06-27 20:48:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:01,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169460538] [2024-06-27 20:48:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:01,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:03,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:03,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169460538] [2024-06-27 20:48:03,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169460538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:03,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:03,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:03,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421275397] [2024-06-27 20:48:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:03,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:03,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:03,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:03,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:03,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 156 transitions, 1455 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:03,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:03,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:03,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:03,573 INFO L124 PetriNetUnfolderBase]: 306/619 cut-off events. [2024-06-27 20:48:03,573 INFO L125 PetriNetUnfolderBase]: For 19325/19325 co-relation queries the response was YES. [2024-06-27 20:48:03,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3244 conditions, 619 events. 306/619 cut-off events. For 19325/19325 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3237 event pairs, 36 based on Foata normal form. 1/618 useless extension candidates. Maximal degree in co-relation 3153. Up to 453 conditions per place. [2024-06-27 20:48:03,578 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-27 20:48:03,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 165 transitions, 1797 flow [2024-06-27 20:48:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-27 20:48:03,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-27 20:48:03,579 INFO L175 Difference]: Start difference. First operand has 191 places, 156 transitions, 1455 flow. Second operand 10 states and 131 transitions. [2024-06-27 20:48:03,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 165 transitions, 1797 flow [2024-06-27 20:48:03,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 165 transitions, 1661 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:03,637 INFO L231 Difference]: Finished difference. Result has 196 places, 156 transitions, 1426 flow [2024-06-27 20:48:03,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1426, PETRI_PLACES=196, PETRI_TRANSITIONS=156} [2024-06-27 20:48:03,637 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-27 20:48:03,637 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 156 transitions, 1426 flow [2024-06-27 20:48:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:03,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:03,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:03,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:48:03,638 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)] === [2024-06-27 20:48:03,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1746710369, now seen corresponding path program 1 times [2024-06-27 20:48:03,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:03,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817050769] [2024-06-27 20:48:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:03,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:04,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:04,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817050769] [2024-06-27 20:48:04,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817050769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:04,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:04,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:04,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947264149] [2024-06-27 20:48:04,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:04,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:04,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:04,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:04,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:04,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:04,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 156 transitions, 1426 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:04,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:04,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:04,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:05,044 INFO L124 PetriNetUnfolderBase]: 310/629 cut-off events. [2024-06-27 20:48:05,045 INFO L125 PetriNetUnfolderBase]: For 21223/21223 co-relation queries the response was YES. [2024-06-27 20:48:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 629 events. 310/629 cut-off events. For 21223/21223 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3315 event pairs, 39 based on Foata normal form. 2/630 useless extension candidates. Maximal degree in co-relation 3197. Up to 512 conditions per place. [2024-06-27 20:48:05,052 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 136 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-27 20:48:05,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 169 transitions, 1798 flow [2024-06-27 20:48:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 20:48:05,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:48:05,060 INFO L175 Difference]: Start difference. First operand has 196 places, 156 transitions, 1426 flow. Second operand 10 states and 130 transitions. [2024-06-27 20:48:05,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 169 transitions, 1798 flow [2024-06-27 20:48:05,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 169 transitions, 1684 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:05,106 INFO L231 Difference]: Finished difference. Result has 197 places, 157 transitions, 1390 flow [2024-06-27 20:48:05,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1390, PETRI_PLACES=197, PETRI_TRANSITIONS=157} [2024-06-27 20:48:05,107 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-27 20:48:05,107 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 157 transitions, 1390 flow [2024-06-27 20:48:05,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:05,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:05,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:05,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:48:05,108 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)] === [2024-06-27 20:48:05,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2042538625, now seen corresponding path program 2 times [2024-06-27 20:48:05,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:05,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164918719] [2024-06-27 20:48:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:05,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164918719] [2024-06-27 20:48:06,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164918719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:06,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:06,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:06,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889089212] [2024-06-27 20:48:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:06,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:06,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:06,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 157 transitions, 1390 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:06,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:06,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:06,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:06,407 INFO L124 PetriNetUnfolderBase]: 322/657 cut-off events. [2024-06-27 20:48:06,407 INFO L125 PetriNetUnfolderBase]: For 31425/31425 co-relation queries the response was YES. [2024-06-27 20:48:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 657 events. 322/657 cut-off events. For 31425/31425 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3473 event pairs, 39 based on Foata normal form. 8/664 useless extension candidates. Maximal degree in co-relation 3290. Up to 528 conditions per place. [2024-06-27 20:48:06,411 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 141 selfloop transitions, 15 changer transitions 13/173 dead transitions. [2024-06-27 20:48:06,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 173 transitions, 1798 flow [2024-06-27 20:48:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-27 20:48:06,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-27 20:48:06,412 INFO L175 Difference]: Start difference. First operand has 197 places, 157 transitions, 1390 flow. Second operand 10 states and 127 transitions. [2024-06-27 20:48:06,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 173 transitions, 1798 flow [2024-06-27 20:48:06,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 173 transitions, 1730 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:06,465 INFO L231 Difference]: Finished difference. Result has 199 places, 152 transitions, 1279 flow [2024-06-27 20:48:06,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1279, PETRI_PLACES=199, PETRI_TRANSITIONS=152} [2024-06-27 20:48:06,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-27 20:48:06,466 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 152 transitions, 1279 flow [2024-06-27 20:48:06,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:06,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:06,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:06,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:48:06,467 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)] === [2024-06-27 20:48:06,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1870932991, now seen corresponding path program 3 times [2024-06-27 20:48:06,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713712987] [2024-06-27 20:48:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:06,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713712987] [2024-06-27 20:48:07,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713712987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:07,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:07,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:07,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39506167] [2024-06-27 20:48:07,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:07,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:07,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:07,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:07,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:07,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:07,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 152 transitions, 1279 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:07,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:07,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:07,666 INFO L124 PetriNetUnfolderBase]: 312/639 cut-off events. [2024-06-27 20:48:07,667 INFO L125 PetriNetUnfolderBase]: For 32142/32142 co-relation queries the response was YES. [2024-06-27 20:48:07,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 639 events. 312/639 cut-off events. For 32142/32142 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3342 event pairs, 33 based on Foata normal form. 8/646 useless extension candidates. Maximal degree in co-relation 3136. Up to 508 conditions per place. [2024-06-27 20:48:07,671 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 138 selfloop transitions, 12 changer transitions 15/169 dead transitions. [2024-06-27 20:48:07,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 169 transitions, 1681 flow [2024-06-27 20:48:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-27 20:48:07,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-27 20:48:07,672 INFO L175 Difference]: Start difference. First operand has 199 places, 152 transitions, 1279 flow. Second operand 10 states and 127 transitions. [2024-06-27 20:48:07,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 169 transitions, 1681 flow [2024-06-27 20:48:07,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 169 transitions, 1643 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:07,733 INFO L231 Difference]: Finished difference. Result has 195 places, 147 transitions, 1230 flow [2024-06-27 20:48:07,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1230, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2024-06-27 20:48:07,734 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-27 20:48:07,734 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1230 flow [2024-06-27 20:48:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:07,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:07,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:48:07,734 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)] === [2024-06-27 20:48:07,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash -536062141, now seen corresponding path program 4 times [2024-06-27 20:48:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:07,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187591659] [2024-06-27 20:48:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:08,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187591659] [2024-06-27 20:48:08,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187591659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:08,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:08,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:08,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637790301] [2024-06-27 20:48:08,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:08,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:08,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:08,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1230 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:08,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:08,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:09,151 INFO L124 PetriNetUnfolderBase]: 351/709 cut-off events. [2024-06-27 20:48:09,151 INFO L125 PetriNetUnfolderBase]: For 39325/39325 co-relation queries the response was YES. [2024-06-27 20:48:09,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4202 conditions, 709 events. 351/709 cut-off events. For 39325/39325 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3757 event pairs, 47 based on Foata normal form. 2/709 useless extension candidates. Maximal degree in co-relation 4109. Up to 528 conditions per place. [2024-06-27 20:48:09,157 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 148 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2024-06-27 20:48:09,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 183 transitions, 1974 flow [2024-06-27 20:48:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-27 20:48:09,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-27 20:48:09,158 INFO L175 Difference]: Start difference. First operand has 195 places, 147 transitions, 1230 flow. Second operand 11 states and 144 transitions. [2024-06-27 20:48:09,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 183 transitions, 1974 flow [2024-06-27 20:48:09,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 183 transitions, 1938 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:09,235 INFO L231 Difference]: Finished difference. Result has 194 places, 165 transitions, 1491 flow [2024-06-27 20:48:09,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1491, PETRI_PLACES=194, PETRI_TRANSITIONS=165} [2024-06-27 20:48:09,235 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-27 20:48:09,236 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 165 transitions, 1491 flow [2024-06-27 20:48:09,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:09,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:09,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:09,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:48:09,236 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)] === [2024-06-27 20:48:09,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1294116097, now seen corresponding path program 5 times [2024-06-27 20:48:09,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:09,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331359775] [2024-06-27 20:48:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:09,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:10,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:10,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331359775] [2024-06-27 20:48:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331359775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:10,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:10,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176177582] [2024-06-27 20:48:10,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:10,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:10,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 165 transitions, 1491 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:10,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:10,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:10,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:10,505 INFO L124 PetriNetUnfolderBase]: 354/723 cut-off events. [2024-06-27 20:48:10,505 INFO L125 PetriNetUnfolderBase]: For 50477/50477 co-relation queries the response was YES. [2024-06-27 20:48:10,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3824 conditions, 723 events. 354/723 cut-off events. For 50477/50477 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3892 event pairs, 43 based on Foata normal form. 20/742 useless extension candidates. Maximal degree in co-relation 3730. Up to 514 conditions per place. [2024-06-27 20:48:10,510 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 37 changer transitions 9/181 dead transitions. [2024-06-27 20:48:10,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 181 transitions, 1951 flow [2024-06-27 20:48:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-27 20:48:10,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-27 20:48:10,511 INFO L175 Difference]: Start difference. First operand has 194 places, 165 transitions, 1491 flow. Second operand 10 states and 132 transitions. [2024-06-27 20:48:10,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 181 transitions, 1951 flow [2024-06-27 20:48:10,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 181 transitions, 1902 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:10,576 INFO L231 Difference]: Finished difference. Result has 198 places, 160 transitions, 1480 flow [2024-06-27 20:48:10,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1480, PETRI_PLACES=198, PETRI_TRANSITIONS=160} [2024-06-27 20:48:10,577 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-27 20:48:10,577 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 160 transitions, 1480 flow [2024-06-27 20:48:10,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:10,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:10,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:10,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:48:10,578 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)] === [2024-06-27 20:48:10,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:10,578 INFO L85 PathProgramCache]: Analyzing trace with hash 686978653, now seen corresponding path program 6 times [2024-06-27 20:48:10,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:10,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569185768] [2024-06-27 20:48:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:10,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:11,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:11,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569185768] [2024-06-27 20:48:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569185768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:11,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:11,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:11,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233278294] [2024-06-27 20:48:11,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:11,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:11,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:11,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:11,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 160 transitions, 1480 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:11,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:11,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:11,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:11,779 INFO L124 PetriNetUnfolderBase]: 332/677 cut-off events. [2024-06-27 20:48:11,779 INFO L125 PetriNetUnfolderBase]: For 31075/31075 co-relation queries the response was YES. [2024-06-27 20:48:11,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3586 conditions, 677 events. 332/677 cut-off events. For 31075/31075 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3567 event pairs, 21 based on Foata normal form. 8/684 useless extension candidates. Maximal degree in co-relation 3491. Up to 506 conditions per place. [2024-06-27 20:48:11,784 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 143 selfloop transitions, 12 changer transitions 21/180 dead transitions. [2024-06-27 20:48:11,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 180 transitions, 1916 flow [2024-06-27 20:48:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 20:48:11,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:48:11,785 INFO L175 Difference]: Start difference. First operand has 198 places, 160 transitions, 1480 flow. Second operand 10 states and 130 transitions. [2024-06-27 20:48:11,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 180 transitions, 1916 flow [2024-06-27 20:48:11,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 180 transitions, 1777 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:11,839 INFO L231 Difference]: Finished difference. Result has 197 places, 152 transitions, 1311 flow [2024-06-27 20:48:11,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1311, PETRI_PLACES=197, PETRI_TRANSITIONS=152} [2024-06-27 20:48:11,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-27 20:48:11,840 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 152 transitions, 1311 flow [2024-06-27 20:48:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:11,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:11,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:11,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:48:11,840 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)] === [2024-06-27 20:48:11,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash -857688483, now seen corresponding path program 7 times [2024-06-27 20:48:11,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:11,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029752417] [2024-06-27 20:48:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:13,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:13,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029752417] [2024-06-27 20:48:13,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029752417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:13,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063804605] [2024-06-27 20:48:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:13,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:13,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:13,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:13,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 152 transitions, 1311 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:13,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:13,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:13,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:13,442 INFO L124 PetriNetUnfolderBase]: 304/625 cut-off events. [2024-06-27 20:48:13,442 INFO L125 PetriNetUnfolderBase]: For 35141/35141 co-relation queries the response was YES. [2024-06-27 20:48:13,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3307 conditions, 625 events. 304/625 cut-off events. For 35141/35141 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3249 event pairs, 29 based on Foata normal form. 10/634 useless extension candidates. Maximal degree in co-relation 3225. Up to 486 conditions per place. [2024-06-27 20:48:13,447 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 137 selfloop transitions, 15 changer transitions 12/168 dead transitions. [2024-06-27 20:48:13,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 168 transitions, 1747 flow [2024-06-27 20:48:13,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:13,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:13,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-27 20:48:13,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-27 20:48:13,448 INFO L175 Difference]: Start difference. First operand has 197 places, 152 transitions, 1311 flow. Second operand 10 states and 128 transitions. [2024-06-27 20:48:13,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 168 transitions, 1747 flow [2024-06-27 20:48:13,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 168 transitions, 1700 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:13,506 INFO L231 Difference]: Finished difference. Result has 186 places, 147 transitions, 1255 flow [2024-06-27 20:48:13,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1255, PETRI_PLACES=186, PETRI_TRANSITIONS=147} [2024-06-27 20:48:13,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-27 20:48:13,508 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 147 transitions, 1255 flow [2024-06-27 20:48:13,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:13,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:13,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:13,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:48:13,509 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)] === [2024-06-27 20:48:13,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1810532831, now seen corresponding path program 8 times [2024-06-27 20:48:13,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:13,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580188733] [2024-06-27 20:48:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:14,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:14,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580188733] [2024-06-27 20:48:14,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580188733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:14,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:14,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341566868] [2024-06-27 20:48:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:14,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:14,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:14,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 147 transitions, 1255 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:14,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:14,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:14,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:14,810 INFO L124 PetriNetUnfolderBase]: 292/605 cut-off events. [2024-06-27 20:48:14,810 INFO L125 PetriNetUnfolderBase]: For 28012/28012 co-relation queries the response was YES. [2024-06-27 20:48:14,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 605 events. 292/605 cut-off events. For 28012/28012 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3107 event pairs, 23 based on Foata normal form. 8/612 useless extension candidates. Maximal degree in co-relation 3044. Up to 476 conditions per place. [2024-06-27 20:48:14,814 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 135 selfloop transitions, 13 changer transitions 11/163 dead transitions. [2024-06-27 20:48:14,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 163 transitions, 1647 flow [2024-06-27 20:48:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:48:14,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:48:14,832 INFO L175 Difference]: Start difference. First operand has 186 places, 147 transitions, 1255 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:48:14,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 163 transitions, 1647 flow [2024-06-27 20:48:14,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 163 transitions, 1579 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:14,881 INFO L231 Difference]: Finished difference. Result has 183 places, 144 transitions, 1201 flow [2024-06-27 20:48:14,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1201, PETRI_PLACES=183, PETRI_TRANSITIONS=144} [2024-06-27 20:48:14,882 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-27 20:48:14,882 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 144 transitions, 1201 flow [2024-06-27 20:48:14,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:14,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:14,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:14,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:48:14,882 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)] === [2024-06-27 20:48:14,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:14,883 INFO L85 PathProgramCache]: Analyzing trace with hash -862450083, now seen corresponding path program 9 times [2024-06-27 20:48:14,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:14,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286866722] [2024-06-27 20:48:14,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:14,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:15,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286866722] [2024-06-27 20:48:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286866722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:15,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:15,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571256300] [2024-06-27 20:48:15,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:15,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:15,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:15,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:15,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 144 transitions, 1201 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:15,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:15,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:15,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:16,164 INFO L124 PetriNetUnfolderBase]: 285/592 cut-off events. [2024-06-27 20:48:16,164 INFO L125 PetriNetUnfolderBase]: For 27584/27584 co-relation queries the response was YES. [2024-06-27 20:48:16,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 592 events. 285/592 cut-off events. For 27584/27584 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3037 event pairs, 21 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 2962. Up to 458 conditions per place. [2024-06-27 20:48:16,168 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 128 selfloop transitions, 7 changer transitions 22/161 dead transitions. [2024-06-27 20:48:16,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 161 transitions, 1589 flow [2024-06-27 20:48:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:48:16,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:48:16,169 INFO L175 Difference]: Start difference. First operand has 183 places, 144 transitions, 1201 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:48:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 161 transitions, 1589 flow [2024-06-27 20:48:16,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 161 transitions, 1525 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:16,210 INFO L231 Difference]: Finished difference. Result has 178 places, 135 transitions, 1098 flow [2024-06-27 20:48:16,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1098, PETRI_PLACES=178, PETRI_TRANSITIONS=135} [2024-06-27 20:48:16,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-27 20:48:16,211 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 135 transitions, 1098 flow [2024-06-27 20:48:16,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:16,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:16,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:48:16,211 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)] === [2024-06-27 20:48:16,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 416789151, now seen corresponding path program 1 times [2024-06-27 20:48:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:16,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366048354] [2024-06-27 20:48:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:17,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:17,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366048354] [2024-06-27 20:48:17,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366048354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:17,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:17,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:17,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985920888] [2024-06-27 20:48:17,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:17,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:17,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:17,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:17,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 135 transitions, 1098 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:17,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:17,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:17,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:17,614 INFO L124 PetriNetUnfolderBase]: 266/553 cut-off events. [2024-06-27 20:48:17,614 INFO L125 PetriNetUnfolderBase]: For 26466/26470 co-relation queries the response was YES. [2024-06-27 20:48:17,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 553 events. 266/553 cut-off events. For 26466/26470 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2792 event pairs, 25 based on Foata normal form. 8/560 useless extension candidates. Maximal degree in co-relation 2749. Up to 384 conditions per place. [2024-06-27 20:48:17,618 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 30 changer transitions 10/149 dead transitions. [2024-06-27 20:48:17,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 149 transitions, 1466 flow [2024-06-27 20:48:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-27 20:48:17,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-27 20:48:17,619 INFO L175 Difference]: Start difference. First operand has 178 places, 135 transitions, 1098 flow. Second operand 11 states and 138 transitions. [2024-06-27 20:48:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 149 transitions, 1466 flow [2024-06-27 20:48:17,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 149 transitions, 1437 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:17,652 INFO L231 Difference]: Finished difference. Result has 170 places, 129 transitions, 1083 flow [2024-06-27 20:48:17,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1083, PETRI_PLACES=170, PETRI_TRANSITIONS=129} [2024-06-27 20:48:17,652 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-27 20:48:17,652 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 129 transitions, 1083 flow [2024-06-27 20:48:17,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:17,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:17,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:17,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:48:17,653 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)] === [2024-06-27 20:48:17,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1881399581, now seen corresponding path program 2 times [2024-06-27 20:48:17,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:17,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481919912] [2024-06-27 20:48:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481919912] [2024-06-27 20:48:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481919912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:18,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:18,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:18,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177530551] [2024-06-27 20:48:18,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:18,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:18,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:18,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 129 transitions, 1083 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:18,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:18,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:19,044 INFO L124 PetriNetUnfolderBase]: 274/577 cut-off events. [2024-06-27 20:48:19,044 INFO L125 PetriNetUnfolderBase]: For 30585/30589 co-relation queries the response was YES. [2024-06-27 20:48:19,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 577 events. 274/577 cut-off events. For 30585/30589 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2974 event pairs, 33 based on Foata normal form. 6/582 useless extension candidates. Maximal degree in co-relation 3268. Up to 336 conditions per place. [2024-06-27 20:48:19,048 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 24 changer transitions 8/147 dead transitions. [2024-06-27 20:48:19,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 147 transitions, 1581 flow [2024-06-27 20:48:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:48:19,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:48:19,049 INFO L175 Difference]: Start difference. First operand has 170 places, 129 transitions, 1083 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:48:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 147 transitions, 1581 flow [2024-06-27 20:48:19,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 147 transitions, 1509 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:19,101 INFO L231 Difference]: Finished difference. Result has 168 places, 125 transitions, 1032 flow [2024-06-27 20:48:19,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1032, PETRI_PLACES=168, PETRI_TRANSITIONS=125} [2024-06-27 20:48:19,101 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-27 20:48:19,101 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 125 transitions, 1032 flow [2024-06-27 20:48:19,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:19,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:19,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:19,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:48:19,102 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)] === [2024-06-27 20:48:19,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash -307976417, now seen corresponding path program 3 times [2024-06-27 20:48:19,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207007427] [2024-06-27 20:48:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:20,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:20,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207007427] [2024-06-27 20:48:20,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207007427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:20,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:20,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179581042] [2024-06-27 20:48:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:20,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:20,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 125 transitions, 1032 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:20,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:20,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:21,016 INFO L124 PetriNetUnfolderBase]: 261/550 cut-off events. [2024-06-27 20:48:21,017 INFO L125 PetriNetUnfolderBase]: For 29755/29759 co-relation queries the response was YES. [2024-06-27 20:48:21,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 550 events. 261/550 cut-off events. For 29755/29759 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2811 event pairs, 38 based on Foata normal form. 8/557 useless extension candidates. Maximal degree in co-relation 2992. Up to 389 conditions per place. [2024-06-27 20:48:21,020 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 14 changer transitions 21/139 dead transitions. [2024-06-27 20:48:21,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 139 transitions, 1378 flow [2024-06-27 20:48:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-27 20:48:21,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-27 20:48:21,021 INFO L175 Difference]: Start difference. First operand has 168 places, 125 transitions, 1032 flow. Second operand 11 states and 135 transitions. [2024-06-27 20:48:21,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 139 transitions, 1378 flow [2024-06-27 20:48:21,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 139 transitions, 1321 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:21,073 INFO L231 Difference]: Finished difference. Result has 165 places, 111 transitions, 874 flow [2024-06-27 20:48:21,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=874, PETRI_PLACES=165, PETRI_TRANSITIONS=111} [2024-06-27 20:48:21,074 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-27 20:48:21,074 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 111 transitions, 874 flow [2024-06-27 20:48:21,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:21,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:21,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:21,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:48:21,075 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)] === [2024-06-27 20:48:21,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:21,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1439488095, now seen corresponding path program 10 times [2024-06-27 20:48:21,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:21,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109246497] [2024-06-27 20:48:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:21,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:21,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:21,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109246497] [2024-06-27 20:48:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109246497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:21,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:21,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799120759] [2024-06-27 20:48:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:21,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:21,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:21,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 111 transitions, 874 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:21,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:21,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:21,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:22,203 INFO L124 PetriNetUnfolderBase]: 239/506 cut-off events. [2024-06-27 20:48:22,203 INFO L125 PetriNetUnfolderBase]: For 30950/30954 co-relation queries the response was YES. [2024-06-27 20:48:22,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2835 conditions, 506 events. 239/506 cut-off events. For 30950/30954 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2491 event pairs, 41 based on Foata normal form. 14/519 useless extension candidates. Maximal degree in co-relation 2768. Up to 291 conditions per place. [2024-06-27 20:48:22,207 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 61 selfloop transitions, 52 changer transitions 6/123 dead transitions. [2024-06-27 20:48:22,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 123 transitions, 1198 flow [2024-06-27 20:48:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:22,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-27 20:48:22,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-27 20:48:22,208 INFO L175 Difference]: Start difference. First operand has 165 places, 111 transitions, 874 flow. Second operand 10 states and 134 transitions. [2024-06-27 20:48:22,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 123 transitions, 1198 flow [2024-06-27 20:48:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 123 transitions, 1120 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-06-27 20:48:22,255 INFO L231 Difference]: Finished difference. Result has 152 places, 109 transitions, 915 flow [2024-06-27 20:48:22,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=152, PETRI_TRANSITIONS=109} [2024-06-27 20:48:22,256 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-27 20:48:22,256 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 109 transitions, 915 flow [2024-06-27 20:48:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:22,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:22,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:48:22,257 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)] === [2024-06-27 20:48:22,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1189505187, now seen corresponding path program 4 times [2024-06-27 20:48:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331033361] [2024-06-27 20:48:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331033361] [2024-06-27 20:48:23,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331033361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:23,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:23,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:23,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614896191] [2024-06-27 20:48:23,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:23,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:23,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:23,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:23,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 109 transitions, 915 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:23,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:23,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:24,168 INFO L124 PetriNetUnfolderBase]: 234/501 cut-off events. [2024-06-27 20:48:24,168 INFO L125 PetriNetUnfolderBase]: For 24077/24081 co-relation queries the response was YES. [2024-06-27 20:48:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 501 events. 234/501 cut-off events. For 24077/24081 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2486 event pairs, 43 based on Foata normal form. 12/512 useless extension candidates. Maximal degree in co-relation 2671. Up to 319 conditions per place. [2024-06-27 20:48:24,171 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 68 selfloop transitions, 36 changer transitions 13/121 dead transitions. [2024-06-27 20:48:24,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 121 transitions, 1211 flow [2024-06-27 20:48:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:48:24,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:48:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-27 20:48:24,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:48:24,172 INFO L175 Difference]: Start difference. First operand has 152 places, 109 transitions, 915 flow. Second operand 12 states and 150 transitions. [2024-06-27 20:48:24,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 121 transitions, 1211 flow [2024-06-27 20:48:24,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 121 transitions, 1095 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:24,211 INFO L231 Difference]: Finished difference. Result has 154 places, 103 transitions, 837 flow [2024-06-27 20:48:24,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=837, PETRI_PLACES=154, PETRI_TRANSITIONS=103} [2024-06-27 20:48:24,212 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-27 20:48:24,212 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 103 transitions, 837 flow [2024-06-27 20:48:24,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:24,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:24,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:24,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:48:24,213 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)] === [2024-06-27 20:48:24,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1448065919, now seen corresponding path program 5 times [2024-06-27 20:48:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138251077] [2024-06-27 20:48:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:25,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:25,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138251077] [2024-06-27 20:48:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138251077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:25,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303880228] [2024-06-27 20:48:25,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:25,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:25,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:25,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:25,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 103 transitions, 837 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:25,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:25,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:25,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:25,878 INFO L124 PetriNetUnfolderBase]: 240/517 cut-off events. [2024-06-27 20:48:25,878 INFO L125 PetriNetUnfolderBase]: For 29686/29690 co-relation queries the response was YES. [2024-06-27 20:48:25,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 517 events. 240/517 cut-off events. For 29686/29690 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2593 event pairs, 49 based on Foata normal form. 10/526 useless extension candidates. Maximal degree in co-relation 3053. Up to 299 conditions per place. [2024-06-27 20:48:25,881 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 73 selfloop transitions, 34 changer transitions 8/119 dead transitions. [2024-06-27 20:48:25,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 119 transitions, 1249 flow [2024-06-27 20:48:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-27 20:48:25,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-27 20:48:25,882 INFO L175 Difference]: Start difference. First operand has 154 places, 103 transitions, 837 flow. Second operand 11 states and 142 transitions. [2024-06-27 20:48:25,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 119 transitions, 1249 flow [2024-06-27 20:48:25,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 119 transitions, 1163 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:25,924 INFO L231 Difference]: Finished difference. Result has 148 places, 99 transitions, 805 flow [2024-06-27 20:48:25,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=805, PETRI_PLACES=148, PETRI_TRANSITIONS=99} [2024-06-27 20:48:25,924 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-27 20:48:25,925 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 99 transitions, 805 flow [2024-06-27 20:48:25,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:25,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:25,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:25,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:48:25,925 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)] === [2024-06-27 20:48:25,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash 551540139, now seen corresponding path program 11 times [2024-06-27 20:48:25,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:25,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636049784] [2024-06-27 20:48:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:25,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636049784] [2024-06-27 20:48:26,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636049784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:26,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660541123] [2024-06-27 20:48:26,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:26,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:26,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:26,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 99 transitions, 805 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:26,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:26,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:26,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:27,241 INFO L124 PetriNetUnfolderBase]: 228/489 cut-off events. [2024-06-27 20:48:27,242 INFO L125 PetriNetUnfolderBase]: For 23830/23834 co-relation queries the response was YES. [2024-06-27 20:48:27,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 489 events. 228/489 cut-off events. For 23830/23834 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2379 event pairs, 51 based on Foata normal form. 6/494 useless extension candidates. Maximal degree in co-relation 2897. Up to 381 conditions per place. [2024-06-27 20:48:27,245 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 74 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-06-27 20:48:27,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 108 transitions, 1043 flow [2024-06-27 20:48:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:48:27,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:48:27,246 INFO L175 Difference]: Start difference. First operand has 148 places, 99 transitions, 805 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:48:27,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 108 transitions, 1043 flow [2024-06-27 20:48:27,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 108 transitions, 971 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:27,284 INFO L231 Difference]: Finished difference. Result has 143 places, 100 transitions, 813 flow [2024-06-27 20:48:27,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=813, PETRI_PLACES=143, PETRI_TRANSITIONS=100} [2024-06-27 20:48:27,284 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-27 20:48:27,284 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 100 transitions, 813 flow [2024-06-27 20:48:27,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:27,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:27,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:48:27,285 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)] === [2024-06-27 20:48:27,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash -126906413, now seen corresponding path program 12 times [2024-06-27 20:48:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818630395] [2024-06-27 20:48:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818630395] [2024-06-27 20:48:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818630395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:28,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758831745] [2024-06-27 20:48:28,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:28,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:28,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 100 transitions, 813 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:28,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:28,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:28,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:28,669 INFO L124 PetriNetUnfolderBase]: 232/493 cut-off events. [2024-06-27 20:48:28,669 INFO L125 PetriNetUnfolderBase]: For 21774/21778 co-relation queries the response was YES. [2024-06-27 20:48:28,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 493 events. 232/493 cut-off events. For 21774/21778 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2410 event pairs, 51 based on Foata normal form. 6/498 useless extension candidates. Maximal degree in co-relation 2897. Up to 362 conditions per place. [2024-06-27 20:48:28,672 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 70 selfloop transitions, 35 changer transitions 0/109 dead transitions. [2024-06-27 20:48:28,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 109 transitions, 1055 flow [2024-06-27 20:48:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:48:28,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:48:28,673 INFO L175 Difference]: Start difference. First operand has 143 places, 100 transitions, 813 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:48:28,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 109 transitions, 1055 flow [2024-06-27 20:48:28,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 109 transitions, 985 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:28,711 INFO L231 Difference]: Finished difference. Result has 145 places, 101 transitions, 835 flow [2024-06-27 20:48:28,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=835, PETRI_PLACES=145, PETRI_TRANSITIONS=101} [2024-06-27 20:48:28,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-27 20:48:28,712 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 101 transitions, 835 flow [2024-06-27 20:48:28,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:28,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:28,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:28,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:48:28,712 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)] === [2024-06-27 20:48:28,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1620397317, now seen corresponding path program 13 times [2024-06-27 20:48:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:28,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362214176] [2024-06-27 20:48:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:29,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362214176] [2024-06-27 20:48:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362214176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:29,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:29,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:29,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058642874] [2024-06-27 20:48:29,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:29,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:29,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:29,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 101 transitions, 835 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:29,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:29,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:29,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:30,223 INFO L124 PetriNetUnfolderBase]: 243/518 cut-off events. [2024-06-27 20:48:30,224 INFO L125 PetriNetUnfolderBase]: For 24707/24711 co-relation queries the response was YES. [2024-06-27 20:48:30,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 518 events. 243/518 cut-off events. For 24707/24711 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2567 event pairs, 54 based on Foata normal form. 6/523 useless extension candidates. Maximal degree in co-relation 3127. Up to 399 conditions per place. [2024-06-27 20:48:30,227 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-27 20:48:30,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 113 transitions, 1191 flow [2024-06-27 20:48:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-27 20:48:30,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-27 20:48:30,228 INFO L175 Difference]: Start difference. First operand has 145 places, 101 transitions, 835 flow. Second operand 10 states and 125 transitions. [2024-06-27 20:48:30,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 113 transitions, 1191 flow [2024-06-27 20:48:30,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 113 transitions, 1109 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:30,266 INFO L231 Difference]: Finished difference. Result has 147 places, 103 transitions, 845 flow [2024-06-27 20:48:30,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=845, PETRI_PLACES=147, PETRI_TRANSITIONS=103} [2024-06-27 20:48:30,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-27 20:48:30,267 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 103 transitions, 845 flow [2024-06-27 20:48:30,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:30,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:30,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:48:30,268 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)] === [2024-06-27 20:48:30,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash -127084043, now seen corresponding path program 14 times [2024-06-27 20:48:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:30,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077660325] [2024-06-27 20:48:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:31,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:31,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077660325] [2024-06-27 20:48:31,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077660325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:31,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:31,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:31,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531456184] [2024-06-27 20:48:31,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:31,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:31,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:31,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:31,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:31,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:31,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 103 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:31,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:31,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:31,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:31,874 INFO L124 PetriNetUnfolderBase]: 254/539 cut-off events. [2024-06-27 20:48:31,874 INFO L125 PetriNetUnfolderBase]: For 27828/27832 co-relation queries the response was YES. [2024-06-27 20:48:31,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3399 conditions, 539 events. 254/539 cut-off events. For 27828/27832 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2699 event pairs, 57 based on Foata normal form. 6/544 useless extension candidates. Maximal degree in co-relation 3341. Up to 381 conditions per place. [2024-06-27 20:48:31,877 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 37 changer transitions 0/115 dead transitions. [2024-06-27 20:48:31,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 115 transitions, 1211 flow [2024-06-27 20:48:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-27 20:48:31,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-27 20:48:31,879 INFO L175 Difference]: Start difference. First operand has 147 places, 103 transitions, 845 flow. Second operand 10 states and 127 transitions. [2024-06-27 20:48:31,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 115 transitions, 1211 flow [2024-06-27 20:48:31,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 115 transitions, 1161 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:31,925 INFO L231 Difference]: Finished difference. Result has 151 places, 105 transitions, 915 flow [2024-06-27 20:48:31,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=151, PETRI_TRANSITIONS=105} [2024-06-27 20:48:31,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-27 20:48:31,925 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 105 transitions, 915 flow [2024-06-27 20:48:31,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:31,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:31,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:48:31,926 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)] === [2024-06-27 20:48:31,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1211593889, now seen corresponding path program 6 times [2024-06-27 20:48:31,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:31,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155945296] [2024-06-27 20:48:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:33,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:33,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155945296] [2024-06-27 20:48:33,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155945296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:33,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:33,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:33,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657783691] [2024-06-27 20:48:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:33,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:33,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:33,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 105 transitions, 915 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:33,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:33,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:33,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:34,187 INFO L124 PetriNetUnfolderBase]: 244/517 cut-off events. [2024-06-27 20:48:34,187 INFO L125 PetriNetUnfolderBase]: For 27233/27237 co-relation queries the response was YES. [2024-06-27 20:48:34,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 517 events. 244/517 cut-off events. For 27233/27237 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2589 event pairs, 49 based on Foata normal form. 12/528 useless extension candidates. Maximal degree in co-relation 2977. Up to 321 conditions per place. [2024-06-27 20:48:34,190 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 58 selfloop transitions, 48 changer transitions 7/117 dead transitions. [2024-06-27 20:48:34,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 117 transitions, 1203 flow [2024-06-27 20:48:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-27 20:48:34,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:48:34,191 INFO L175 Difference]: Start difference. First operand has 151 places, 105 transitions, 915 flow. Second operand 11 states and 143 transitions. [2024-06-27 20:48:34,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 117 transitions, 1203 flow [2024-06-27 20:48:34,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 117 transitions, 1133 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:34,232 INFO L231 Difference]: Finished difference. Result has 156 places, 102 transitions, 925 flow [2024-06-27 20:48:34,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=925, PETRI_PLACES=156, PETRI_TRANSITIONS=102} [2024-06-27 20:48:34,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-27 20:48:34,233 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 102 transitions, 925 flow [2024-06-27 20:48:34,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:34,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:34,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:48:34,233 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)] === [2024-06-27 20:48:34,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 542556221, now seen corresponding path program 15 times [2024-06-27 20:48:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812273821] [2024-06-27 20:48:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:35,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:35,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812273821] [2024-06-27 20:48:35,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812273821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:35,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:35,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630166486] [2024-06-27 20:48:35,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:35,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:35,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 102 transitions, 925 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:35,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:35,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:35,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:35,702 INFO L124 PetriNetUnfolderBase]: 236/507 cut-off events. [2024-06-27 20:48:35,702 INFO L125 PetriNetUnfolderBase]: For 28195/28199 co-relation queries the response was YES. [2024-06-27 20:48:35,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 507 events. 236/507 cut-off events. For 28195/28199 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2536 event pairs, 53 based on Foata normal form. 10/516 useless extension candidates. Maximal degree in co-relation 2873. Up to 388 conditions per place. [2024-06-27 20:48:35,705 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 20 changer transitions 9/115 dead transitions. [2024-06-27 20:48:35,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 115 transitions, 1213 flow [2024-06-27 20:48:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-27 20:48:35,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-27 20:48:35,706 INFO L175 Difference]: Start difference. First operand has 156 places, 102 transitions, 925 flow. Second operand 10 states and 130 transitions. [2024-06-27 20:48:35,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 115 transitions, 1213 flow [2024-06-27 20:48:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 115 transitions, 1097 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:35,747 INFO L231 Difference]: Finished difference. Result has 152 places, 96 transitions, 816 flow [2024-06-27 20:48:35,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=816, PETRI_PLACES=152, PETRI_TRANSITIONS=96} [2024-06-27 20:48:35,747 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-27 20:48:35,748 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 96 transitions, 816 flow [2024-06-27 20:48:35,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:35,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:35,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:35,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:48:35,748 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)] === [2024-06-27 20:48:35,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash 551720063, now seen corresponding path program 7 times [2024-06-27 20:48:35,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:35,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208793483] [2024-06-27 20:48:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:35,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:37,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:37,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208793483] [2024-06-27 20:48:37,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208793483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:37,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:37,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:37,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693498468] [2024-06-27 20:48:37,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:37,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:37,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:37,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:37,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 96 transitions, 816 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:37,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:37,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:37,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:37,743 INFO L124 PetriNetUnfolderBase]: 226/489 cut-off events. [2024-06-27 20:48:37,743 INFO L125 PetriNetUnfolderBase]: For 24882/24886 co-relation queries the response was YES. [2024-06-27 20:48:37,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 489 events. 226/489 cut-off events. For 24882/24886 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2430 event pairs, 50 based on Foata normal form. 12/500 useless extension candidates. Maximal degree in co-relation 2702. Up to 351 conditions per place. [2024-06-27 20:48:37,746 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 24 changer transitions 13/108 dead transitions. [2024-06-27 20:48:37,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 108 transitions, 1084 flow [2024-06-27 20:48:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-27 20:48:37,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-27 20:48:37,747 INFO L175 Difference]: Start difference. First operand has 152 places, 96 transitions, 816 flow. Second operand 11 states and 139 transitions. [2024-06-27 20:48:37,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 108 transitions, 1084 flow [2024-06-27 20:48:37,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 108 transitions, 1004 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:37,788 INFO L231 Difference]: Finished difference. Result has 150 places, 90 transitions, 748 flow [2024-06-27 20:48:37,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=748, PETRI_PLACES=150, PETRI_TRANSITIONS=90} [2024-06-27 20:48:37,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-27 20:48:37,789 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 90 transitions, 748 flow [2024-06-27 20:48:37,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:37,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:37,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:37,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:48:37,789 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)] === [2024-06-27 20:48:37,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:37,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2028174173, now seen corresponding path program 8 times [2024-06-27 20:48:37,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:37,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866967452] [2024-06-27 20:48:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:37,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:38,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:38,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866967452] [2024-06-27 20:48:38,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866967452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:38,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:38,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:38,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486568549] [2024-06-27 20:48:38,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:38,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:38,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:38,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:38,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:39,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 90 transitions, 748 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:39,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:39,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:39,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:39,424 INFO L124 PetriNetUnfolderBase]: 232/521 cut-off events. [2024-06-27 20:48:39,425 INFO L125 PetriNetUnfolderBase]: For 31083/31087 co-relation queries the response was YES. [2024-06-27 20:48:39,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 521 events. 232/521 cut-off events. For 31083/31087 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2658 event pairs, 63 based on Foata normal form. 6/526 useless extension candidates. Maximal degree in co-relation 3101. Up to 332 conditions per place. [2024-06-27 20:48:39,428 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 79 selfloop transitions, 18 changer transitions 9/110 dead transitions. [2024-06-27 20:48:39,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 110 transitions, 1146 flow [2024-06-27 20:48:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:48:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:48:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-27 20:48:39,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-27 20:48:39,429 INFO L175 Difference]: Start difference. First operand has 150 places, 90 transitions, 748 flow. Second operand 12 states and 152 transitions. [2024-06-27 20:48:39,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 110 transitions, 1146 flow [2024-06-27 20:48:39,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 110 transitions, 1078 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:39,470 INFO L231 Difference]: Finished difference. Result has 145 places, 87 transitions, 707 flow [2024-06-27 20:48:39,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=707, PETRI_PLACES=145, PETRI_TRANSITIONS=87} [2024-06-27 20:48:39,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-27 20:48:39,471 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 87 transitions, 707 flow [2024-06-27 20:48:39,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:39,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:39,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:39,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:48:39,471 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)] === [2024-06-27 20:48:39,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1685875583, now seen corresponding path program 9 times [2024-06-27 20:48:39,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:39,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561655028] [2024-06-27 20:48:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:39,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561655028] [2024-06-27 20:48:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561655028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:40,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:40,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:40,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274632786] [2024-06-27 20:48:40,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:40,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:40,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:40,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 87 transitions, 707 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:40,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:40,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:40,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:41,024 INFO L124 PetriNetUnfolderBase]: 222/495 cut-off events. [2024-06-27 20:48:41,024 INFO L125 PetriNetUnfolderBase]: For 27018/27022 co-relation queries the response was YES. [2024-06-27 20:48:41,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 495 events. 222/495 cut-off events. For 27018/27022 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2469 event pairs, 61 based on Foata normal form. 6/500 useless extension candidates. Maximal degree in co-relation 2934. Up to 392 conditions per place. [2024-06-27 20:48:41,027 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 16 changer transitions 11/102 dead transitions. [2024-06-27 20:48:41,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 102 transitions, 957 flow [2024-06-27 20:48:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:48:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:48:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-27 20:48:41,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-27 20:48:41,028 INFO L175 Difference]: Start difference. First operand has 145 places, 87 transitions, 707 flow. Second operand 12 states and 146 transitions. [2024-06-27 20:48:41,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 102 transitions, 957 flow [2024-06-27 20:48:41,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 102 transitions, 919 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:41,068 INFO L231 Difference]: Finished difference. Result has 142 places, 83 transitions, 673 flow [2024-06-27 20:48:41,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=142, PETRI_TRANSITIONS=83} [2024-06-27 20:48:41,068 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-27 20:48:41,068 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 83 transitions, 673 flow [2024-06-27 20:48:41,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:41,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:41,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:41,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:48:41,069 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)] === [2024-06-27 20:48:41,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -90323357, now seen corresponding path program 16 times [2024-06-27 20:48:41,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:41,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109009993] [2024-06-27 20:48:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:41,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109009993] [2024-06-27 20:48:41,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109009993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:41,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:41,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:41,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346595923] [2024-06-27 20:48:41,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:42,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:42,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 83 transitions, 673 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:42,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:42,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:42,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:42,388 INFO L124 PetriNetUnfolderBase]: 215/478 cut-off events. [2024-06-27 20:48:42,388 INFO L125 PetriNetUnfolderBase]: For 26110/26114 co-relation queries the response was YES. [2024-06-27 20:48:42,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2814 conditions, 478 events. 215/478 cut-off events. For 26110/26114 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2375 event pairs, 61 based on Foata normal form. 14/491 useless extension candidates. Maximal degree in co-relation 2758. Up to 348 conditions per place. [2024-06-27 20:48:42,391 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 62 selfloop transitions, 22 changer transitions 6/94 dead transitions. [2024-06-27 20:48:42,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 94 transitions, 909 flow [2024-06-27 20:48:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-27 20:48:42,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-27 20:48:42,392 INFO L175 Difference]: Start difference. First operand has 142 places, 83 transitions, 673 flow. Second operand 10 states and 127 transitions. [2024-06-27 20:48:42,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 94 transitions, 909 flow [2024-06-27 20:48:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 94 transitions, 855 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:42,429 INFO L231 Difference]: Finished difference. Result has 135 places, 80 transitions, 651 flow [2024-06-27 20:48:42,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=651, PETRI_PLACES=135, PETRI_TRANSITIONS=80} [2024-06-27 20:48:42,429 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-27 20:48:42,430 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 651 flow [2024-06-27 20:48:42,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:42,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:42,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:42,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:48:42,430 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)] === [2024-06-27 20:48:42,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash 788192093, now seen corresponding path program 10 times [2024-06-27 20:48:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844027385] [2024-06-27 20:48:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844027385] [2024-06-27 20:48:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844027385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:43,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:43,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470178441] [2024-06-27 20:48:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:43,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:43,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 80 transitions, 651 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:43,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:43,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:43,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:43,941 INFO L124 PetriNetUnfolderBase]: 221/494 cut-off events. [2024-06-27 20:48:43,941 INFO L125 PetriNetUnfolderBase]: For 25899/25903 co-relation queries the response was YES. [2024-06-27 20:48:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3013 conditions, 494 events. 221/494 cut-off events. For 25899/25903 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2456 event pairs, 66 based on Foata normal form. 10/503 useless extension candidates. Maximal degree in co-relation 2959. Up to 327 conditions per place. [2024-06-27 20:48:43,944 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 66 selfloop transitions, 19 changer transitions 7/96 dead transitions. [2024-06-27 20:48:43,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 96 transitions, 997 flow [2024-06-27 20:48:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-27 20:48:43,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-27 20:48:43,945 INFO L175 Difference]: Start difference. First operand has 135 places, 80 transitions, 651 flow. Second operand 11 states and 138 transitions. [2024-06-27 20:48:43,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 96 transitions, 997 flow [2024-06-27 20:48:43,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 96 transitions, 947 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:48:43,979 INFO L231 Difference]: Finished difference. Result has 135 places, 77 transitions, 621 flow [2024-06-27 20:48:43,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=621, PETRI_PLACES=135, PETRI_TRANSITIONS=77} [2024-06-27 20:48:43,980 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-27 20:48:43,980 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 77 transitions, 621 flow [2024-06-27 20:48:43,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:43,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:43,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:43,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:48:43,980 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)] === [2024-06-27 20:48:43,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash -90316413, now seen corresponding path program 11 times [2024-06-27 20:48:43,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:43,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734735051] [2024-06-27 20:48:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:43,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:45,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734735051] [2024-06-27 20:48:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734735051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:45,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:45,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255500920] [2024-06-27 20:48:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:45,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:45,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 77 transitions, 621 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:45,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:45,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:45,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:45,424 INFO L124 PetriNetUnfolderBase]: 196/439 cut-off events. [2024-06-27 20:48:45,424 INFO L125 PetriNetUnfolderBase]: For 21706/21710 co-relation queries the response was YES. [2024-06-27 20:48:45,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 439 events. 196/439 cut-off events. For 21706/21710 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2093 event pairs, 58 based on Foata normal form. 12/450 useless extension candidates. Maximal degree in co-relation 2439. Up to 321 conditions per place. [2024-06-27 20:48:45,426 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 60 selfloop transitions, 18 changer transitions 7/89 dead transitions. [2024-06-27 20:48:45,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 89 transitions, 847 flow [2024-06-27 20:48:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:45,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:48:45,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:48:45,428 INFO L175 Difference]: Start difference. First operand has 135 places, 77 transitions, 621 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:48:45,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 89 transitions, 847 flow [2024-06-27 20:48:45,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 89 transitions, 789 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:45,456 INFO L231 Difference]: Finished difference. Result has 131 places, 74 transitions, 584 flow [2024-06-27 20:48:45,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=584, PETRI_PLACES=131, PETRI_TRANSITIONS=74} [2024-06-27 20:48:45,456 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-27 20:48:45,457 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 74 transitions, 584 flow [2024-06-27 20:48:45,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:45,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:45,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:48:45,457 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)] === [2024-06-27 20:48:45,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash -262990877, now seen corresponding path program 17 times [2024-06-27 20:48:45,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:45,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867940491] [2024-06-27 20:48:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:45,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:46,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:46,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867940491] [2024-06-27 20:48:46,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867940491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:46,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:46,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153045713] [2024-06-27 20:48:46,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:46,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:46,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 74 transitions, 584 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:46,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:46,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:46,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:46,540 INFO L124 PetriNetUnfolderBase]: 183/412 cut-off events. [2024-06-27 20:48:46,541 INFO L125 PetriNetUnfolderBase]: For 15808/15812 co-relation queries the response was YES. [2024-06-27 20:48:46,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 412 events. 183/412 cut-off events. For 15808/15812 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1906 event pairs, 54 based on Foata normal form. 6/417 useless extension candidates. Maximal degree in co-relation 2279. Up to 333 conditions per place. [2024-06-27 20:48:46,543 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 64 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-27 20:48:46,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 84 transitions, 782 flow [2024-06-27 20:48:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-27 20:48:46,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-27 20:48:46,544 INFO L175 Difference]: Start difference. First operand has 131 places, 74 transitions, 584 flow. Second operand 10 states and 118 transitions. [2024-06-27 20:48:46,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 84 transitions, 782 flow [2024-06-27 20:48:46,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 84 transitions, 738 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:46,572 INFO L231 Difference]: Finished difference. Result has 127 places, 75 transitions, 598 flow [2024-06-27 20:48:46,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=598, PETRI_PLACES=127, PETRI_TRANSITIONS=75} [2024-06-27 20:48:46,573 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-27 20:48:46,573 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 75 transitions, 598 flow [2024-06-27 20:48:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:46,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:46,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:48:46,573 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)] === [2024-06-27 20:48:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash -430372959, now seen corresponding path program 18 times [2024-06-27 20:48:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925578948] [2024-06-27 20:48:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:47,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:47,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925578948] [2024-06-27 20:48:47,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925578948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:47,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:47,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:47,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754163929] [2024-06-27 20:48:47,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:47,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:47,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:47,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:47,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 75 transitions, 598 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:47,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:47,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:47,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:47,681 INFO L124 PetriNetUnfolderBase]: 195/440 cut-off events. [2024-06-27 20:48:47,681 INFO L125 PetriNetUnfolderBase]: For 18383/18387 co-relation queries the response was YES. [2024-06-27 20:48:47,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 440 events. 195/440 cut-off events. For 18383/18387 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2091 event pairs, 54 based on Foata normal form. 12/451 useless extension candidates. Maximal degree in co-relation 2355. Up to 332 conditions per place. [2024-06-27 20:48:47,683 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 60 selfloop transitions, 12 changer transitions 12/88 dead transitions. [2024-06-27 20:48:47,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 88 transitions, 820 flow [2024-06-27 20:48:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-27 20:48:47,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-27 20:48:47,687 INFO L175 Difference]: Start difference. First operand has 127 places, 75 transitions, 598 flow. Second operand 10 states and 120 transitions. [2024-06-27 20:48:47,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 88 transitions, 820 flow [2024-06-27 20:48:47,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 88 transitions, 762 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:47,714 INFO L231 Difference]: Finished difference. Result has 128 places, 72 transitions, 549 flow [2024-06-27 20:48:47,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=549, PETRI_PLACES=128, PETRI_TRANSITIONS=72} [2024-06-27 20:48:47,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-27 20:48:47,715 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 72 transitions, 549 flow [2024-06-27 20:48:47,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:47,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:47,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:47,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:48:47,716 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)] === [2024-06-27 20:48:47,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:47,717 INFO L85 PathProgramCache]: Analyzing trace with hash 551134045, now seen corresponding path program 12 times [2024-06-27 20:48:47,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:47,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611623659] [2024-06-27 20:48:47,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:47,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:49,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:49,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611623659] [2024-06-27 20:48:49,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611623659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:49,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:49,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173119587] [2024-06-27 20:48:49,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:49,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:49,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:49,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 72 transitions, 549 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:49,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:49,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:49,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:49,428 INFO L124 PetriNetUnfolderBase]: 181/416 cut-off events. [2024-06-27 20:48:49,428 INFO L125 PetriNetUnfolderBase]: For 18265/18267 co-relation queries the response was YES. [2024-06-27 20:48:49,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2273 conditions, 416 events. 181/416 cut-off events. For 18265/18267 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1977 event pairs, 59 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 2223. Up to 277 conditions per place. [2024-06-27 20:48:49,430 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 64 selfloop transitions, 14 changer transitions 7/89 dead transitions. [2024-06-27 20:48:49,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 89 transitions, 853 flow [2024-06-27 20:48:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:49,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-27 20:48:49,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-27 20:48:49,432 INFO L175 Difference]: Start difference. First operand has 128 places, 72 transitions, 549 flow. Second operand 11 states and 138 transitions. [2024-06-27 20:48:49,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 89 transitions, 853 flow [2024-06-27 20:48:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 89 transitions, 817 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:48:49,452 INFO L231 Difference]: Finished difference. Result has 125 places, 69 transitions, 530 flow [2024-06-27 20:48:49,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=530, PETRI_PLACES=125, PETRI_TRANSITIONS=69} [2024-06-27 20:48:49,452 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-27 20:48:49,452 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 69 transitions, 530 flow [2024-06-27 20:48:49,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:49,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:49,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:49,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:48:49,453 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)] === [2024-06-27 20:48:49,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash -209211011, now seen corresponding path program 13 times [2024-06-27 20:48:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:49,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666817049] [2024-06-27 20:48:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:49,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666817049] [2024-06-27 20:48:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666817049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:50,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:50,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787579393] [2024-06-27 20:48:50,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:50,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:50,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:50,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:50,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 69 transitions, 530 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:50,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:50,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:50,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:50,875 INFO L124 PetriNetUnfolderBase]: 164/381 cut-off events. [2024-06-27 20:48:50,875 INFO L125 PetriNetUnfolderBase]: For 16480/16482 co-relation queries the response was YES. [2024-06-27 20:48:50,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 381 events. 164/381 cut-off events. For 16480/16482 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1744 event pairs, 57 based on Foata normal form. 14/394 useless extension candidates. Maximal degree in co-relation 1780. Up to 267 conditions per place. [2024-06-27 20:48:50,877 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 53 selfloop transitions, 8 changer transitions 17/82 dead transitions. [2024-06-27 20:48:50,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 82 transitions, 722 flow [2024-06-27 20:48:50,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-27 20:48:50,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-27 20:48:50,878 INFO L175 Difference]: Start difference. First operand has 125 places, 69 transitions, 530 flow. Second operand 11 states and 134 transitions. [2024-06-27 20:48:50,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 82 transitions, 722 flow [2024-06-27 20:48:50,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 82 transitions, 670 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-27 20:48:50,891 INFO L231 Difference]: Finished difference. Result has 122 places, 60 transitions, 438 flow [2024-06-27 20:48:50,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=438, PETRI_PLACES=122, PETRI_TRANSITIONS=60} [2024-06-27 20:48:50,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-27 20:48:50,892 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 60 transitions, 438 flow [2024-06-27 20:48:50,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:50,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:50,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:48:50,893 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)] === [2024-06-27 20:48:50,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash -881625179, now seen corresponding path program 19 times [2024-06-27 20:48:50,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:50,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650319592] [2024-06-27 20:48:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:51,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:51,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650319592] [2024-06-27 20:48:51,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650319592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:51,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:51,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:48:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531139666] [2024-06-27 20:48:51,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:51,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:48:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:48:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:48:51,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:51,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 60 transitions, 438 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:51,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:51,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:51,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:51,994 INFO L124 PetriNetUnfolderBase]: 127/298 cut-off events. [2024-06-27 20:48:51,994 INFO L125 PetriNetUnfolderBase]: For 7793/7795 co-relation queries the response was YES. [2024-06-27 20:48:51,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 298 events. 127/298 cut-off events. For 7793/7795 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1231 event pairs, 34 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1366. Up to 225 conditions per place. [2024-06-27 20:48:51,995 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 55 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-06-27 20:48:51,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 74 transitions, 613 flow [2024-06-27 20:48:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-27 20:48:51,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-27 20:48:51,996 INFO L175 Difference]: Start difference. First operand has 122 places, 60 transitions, 438 flow. Second operand 11 states and 131 transitions. [2024-06-27 20:48:51,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 74 transitions, 613 flow [2024-06-27 20:48:52,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 74 transitions, 564 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:52,007 INFO L231 Difference]: Finished difference. Result has 109 places, 60 transitions, 423 flow [2024-06-27 20:48:52,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=423, PETRI_PLACES=109, PETRI_TRANSITIONS=60} [2024-06-27 20:48:52,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-27 20:48:52,007 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 60 transitions, 423 flow [2024-06-27 20:48:52,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:52,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:52,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:52,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:48:52,008 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)] === [2024-06-27 20:48:52,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1450154412, now seen corresponding path program 1 times [2024-06-27 20:48:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:52,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535730069] [2024-06-27 20:48:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:53,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:53,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535730069] [2024-06-27 20:48:53,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535730069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:53,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:53,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:53,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607568985] [2024-06-27 20:48:53,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:53,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:53,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:53,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:53,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 60 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:53,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:53,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:53,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:53,728 INFO L124 PetriNetUnfolderBase]: 120/285 cut-off events. [2024-06-27 20:48:53,728 INFO L125 PetriNetUnfolderBase]: For 5327/5329 co-relation queries the response was YES. [2024-06-27 20:48:53,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 285 events. 120/285 cut-off events. For 5327/5329 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1185 event pairs, 23 based on Foata normal form. 6/290 useless extension candidates. Maximal degree in co-relation 1080. Up to 180 conditions per place. [2024-06-27 20:48:53,729 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 45 selfloop transitions, 13 changer transitions 12/74 dead transitions. [2024-06-27 20:48:53,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 74 transitions, 595 flow [2024-06-27 20:48:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:48:53,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:48:53,730 INFO L175 Difference]: Start difference. First operand has 109 places, 60 transitions, 423 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:48:53,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 74 transitions, 595 flow [2024-06-27 20:48:53,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 74 transitions, 504 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-27 20:48:53,736 INFO L231 Difference]: Finished difference. Result has 107 places, 55 transitions, 330 flow [2024-06-27 20:48:53,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=330, PETRI_PLACES=107, PETRI_TRANSITIONS=55} [2024-06-27 20:48:53,737 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-27 20:48:53,737 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 55 transitions, 330 flow [2024-06-27 20:48:53,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:53,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:53,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:53,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:48:53,737 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)] === [2024-06-27 20:48:53,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 561943594, now seen corresponding path program 2 times [2024-06-27 20:48:53,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:53,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386799590] [2024-06-27 20:48:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:53,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:55,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:55,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386799590] [2024-06-27 20:48:55,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386799590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:55,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:55,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319566822] [2024-06-27 20:48:55,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:55,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:55,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:55,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:55,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 55 transitions, 330 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:55,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:55,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:55,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:55,488 INFO L124 PetriNetUnfolderBase]: 106/259 cut-off events. [2024-06-27 20:48:55,488 INFO L125 PetriNetUnfolderBase]: For 5507/5509 co-relation queries the response was YES. [2024-06-27 20:48:55,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 259 events. 106/259 cut-off events. For 5507/5509 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1024 event pairs, 19 based on Foata normal form. 6/264 useless extension candidates. Maximal degree in co-relation 873. Up to 144 conditions per place. [2024-06-27 20:48:55,489 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 34 selfloop transitions, 3 changer transitions 29/70 dead transitions. [2024-06-27 20:48:55,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 70 transitions, 496 flow [2024-06-27 20:48:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:48:55,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:48:55,490 INFO L175 Difference]: Start difference. First operand has 107 places, 55 transitions, 330 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:48:55,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 70 transitions, 496 flow [2024-06-27 20:48:55,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 70 transitions, 456 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:55,496 INFO L231 Difference]: Finished difference. Result has 100 places, 40 transitions, 224 flow [2024-06-27 20:48:55,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=100, PETRI_TRANSITIONS=40} [2024-06-27 20:48:55,496 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-27 20:48:55,497 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 40 transitions, 224 flow [2024-06-27 20:48:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:55,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:55,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:55,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:48:55,497 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)] === [2024-06-27 20:48:55,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1307289944, now seen corresponding path program 3 times [2024-06-27 20:48:55,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:55,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502719277] [2024-06-27 20:48:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:55,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:56,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502719277] [2024-06-27 20:48:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502719277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:56,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244974736] [2024-06-27 20:48:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:56,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:57,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:57,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 40 transitions, 224 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:57,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:57,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:57,354 INFO L124 PetriNetUnfolderBase]: 77/184 cut-off events. [2024-06-27 20:48:57,354 INFO L125 PetriNetUnfolderBase]: For 4718/4720 co-relation queries the response was YES. [2024-06-27 20:48:57,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 184 events. 77/184 cut-off events. For 4718/4720 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 620 event pairs, 8 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 634. Up to 96 conditions per place. [2024-06-27 20:48:57,355 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 28 selfloop transitions, 11 changer transitions 10/53 dead transitions. [2024-06-27 20:48:57,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 53 transitions, 350 flow [2024-06-27 20:48:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-27 20:48:57,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-27 20:48:57,356 INFO L175 Difference]: Start difference. First operand has 100 places, 40 transitions, 224 flow. Second operand 11 states and 130 transitions. [2024-06-27 20:48:57,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 53 transitions, 350 flow [2024-06-27 20:48:57,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 53 transitions, 324 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-27 20:48:57,360 INFO L231 Difference]: Finished difference. Result has 78 places, 36 transitions, 203 flow [2024-06-27 20:48:57,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=203, PETRI_PLACES=78, PETRI_TRANSITIONS=36} [2024-06-27 20:48:57,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-27 20:48:57,360 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 36 transitions, 203 flow [2024-06-27 20:48:57,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:57,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:57,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:57,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:48:57,361 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)] === [2024-06-27 20:48:57,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1601760656, now seen corresponding path program 4 times [2024-06-27 20:48:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924251021] [2024-06-27 20:48:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:57,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:58,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:58,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924251021] [2024-06-27 20:48:58,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924251021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:58,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:48:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605241296] [2024-06-27 20:48:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:58,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:48:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:48:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:48:58,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:48:58,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 36 transitions, 203 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:58,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:58,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:48:58,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:58,946 INFO L124 PetriNetUnfolderBase]: 66/161 cut-off events. [2024-06-27 20:48:58,947 INFO L125 PetriNetUnfolderBase]: For 2682/2684 co-relation queries the response was YES. [2024-06-27 20:48:58,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 161 events. 66/161 cut-off events. For 2682/2684 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 509 event pairs, 17 based on Foata normal form. 8/169 useless extension candidates. Maximal degree in co-relation 548. Up to 92 conditions per place. [2024-06-27 20:48:58,947 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 24 selfloop transitions, 7 changer transitions 13/48 dead transitions. [2024-06-27 20:48:58,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 48 transitions, 317 flow [2024-06-27 20:48:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-27 20:48:58,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-27 20:48:58,948 INFO L175 Difference]: Start difference. First operand has 78 places, 36 transitions, 203 flow. Second operand 11 states and 127 transitions. [2024-06-27 20:48:58,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 48 transitions, 317 flow [2024-06-27 20:48:58,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 48 transitions, 287 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:48:58,951 INFO L231 Difference]: Finished difference. Result has 72 places, 31 transitions, 164 flow [2024-06-27 20:48:58,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=164, PETRI_PLACES=72, PETRI_TRANSITIONS=31} [2024-06-27 20:48:58,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-27 20:48:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 31 transitions, 164 flow [2024-06-27 20:48:58,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:58,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:58,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:58,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:48:58,961 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)] === [2024-06-27 20:48:58,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -167923090, now seen corresponding path program 5 times [2024-06-27 20:48:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133602213] [2024-06-27 20:48:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:00,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:00,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133602213] [2024-06-27 20:49:00,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133602213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:00,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:00,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:49:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537681493] [2024-06-27 20:49:00,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:00,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:49:00,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:49:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:49:00,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:49:00,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 31 transitions, 164 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:00,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:00,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:49:00,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:00,537 INFO L124 PetriNetUnfolderBase]: 57/140 cut-off events. [2024-06-27 20:49:00,538 INFO L125 PetriNetUnfolderBase]: For 1964/1966 co-relation queries the response was YES. [2024-06-27 20:49:00,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 140 events. 57/140 cut-off events. For 1964/1966 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 401 event pairs, 15 based on Foata normal form. 8/148 useless extension candidates. Maximal degree in co-relation 462. Up to 74 conditions per place. [2024-06-27 20:49:00,538 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 19 selfloop transitions, 4 changer transitions 17/44 dead transitions. [2024-06-27 20:49:00,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 272 flow [2024-06-27 20:49:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-27 20:49:00,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-27 20:49:00,539 INFO L175 Difference]: Start difference. First operand has 72 places, 31 transitions, 164 flow. Second operand 11 states and 126 transitions. [2024-06-27 20:49:00,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 44 transitions, 272 flow [2024-06-27 20:49:00,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 44 transitions, 246 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-27 20:49:00,541 INFO L231 Difference]: Finished difference. Result has 64 places, 25 transitions, 121 flow [2024-06-27 20:49:00,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=121, PETRI_PLACES=64, PETRI_TRANSITIONS=25} [2024-06-27 20:49:00,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-27 20:49:00,541 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 25 transitions, 121 flow [2024-06-27 20:49:00,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:00,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:00,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:00,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:49:00,542 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)] === [2024-06-27 20:49:00,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:00,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1095509588, now seen corresponding path program 6 times [2024-06-27 20:49:00,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:00,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165321748] [2024-06-27 20:49:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:00,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:01,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:01,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165321748] [2024-06-27 20:49:01,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165321748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:01,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:01,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:49:01,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046796017] [2024-06-27 20:49:01,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:01,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:49:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:01,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:49:01,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:49:02,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:49:02,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 25 transitions, 121 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:02,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:02,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:49:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:02,249 INFO L124 PetriNetUnfolderBase]: 44/109 cut-off events. [2024-06-27 20:49:02,250 INFO L125 PetriNetUnfolderBase]: For 1352/1356 co-relation queries the response was YES. [2024-06-27 20:49:02,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 109 events. 44/109 cut-off events. For 1352/1356 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 260 event pairs, 15 based on Foata normal form. 10/119 useless extension candidates. Maximal degree in co-relation 356. Up to 52 conditions per place. [2024-06-27 20:49:02,250 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 16 selfloop transitions, 7 changer transitions 10/37 dead transitions. [2024-06-27 20:49:02,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 37 transitions, 213 flow [2024-06-27 20:49:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-27 20:49:02,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-27 20:49:02,251 INFO L175 Difference]: Start difference. First operand has 64 places, 25 transitions, 121 flow. Second operand 11 states and 122 transitions. [2024-06-27 20:49:02,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 37 transitions, 213 flow [2024-06-27 20:49:02,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 37 transitions, 193 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 20:49:02,253 INFO L231 Difference]: Finished difference. Result has 54 places, 22 transitions, 104 flow [2024-06-27 20:49:02,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=104, PETRI_PLACES=54, PETRI_TRANSITIONS=22} [2024-06-27 20:49:02,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-27 20:49:02,253 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 22 transitions, 104 flow [2024-06-27 20:49:02,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:02,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:02,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:02,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:49:02,254 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)] === [2024-06-27 20:49:02,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:02,254 INFO L85 PathProgramCache]: Analyzing trace with hash 355362744, now seen corresponding path program 7 times [2024-06-27 20:49:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565718484] [2024-06-27 20:49:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:02,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:03,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565718484] [2024-06-27 20:49:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565718484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:03,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:03,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:49:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055159358] [2024-06-27 20:49:03,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:03,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:49:03,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:03,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:49:03,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:49:03,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-27 20:49:03,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 22 transitions, 104 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:03,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:03,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-27 20:49:03,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:03,789 INFO L124 PetriNetUnfolderBase]: 22/63 cut-off events. [2024-06-27 20:49:03,789 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2024-06-27 20:49:03,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 63 events. 22/63 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 162. Up to 24 conditions per place. [2024-06-27 20:49:03,789 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-27 20:49:03,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 30 transitions, 150 flow [2024-06-27 20:49:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:49:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:49:03,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-27 20:49:03,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-27 20:49:03,790 INFO L175 Difference]: Start difference. First operand has 54 places, 22 transitions, 104 flow. Second operand 11 states and 115 transitions. [2024-06-27 20:49:03,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 30 transitions, 150 flow [2024-06-27 20:49:03,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 118 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-27 20:49:03,790 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2024-06-27 20:49:03,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=11, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2024-06-27 20:49:03,791 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-27 20:49:03,791 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2024-06-27 20:49:03,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:03,793 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 20:49:03,803 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 20:49:03,804 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 20:49:03,804 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 20:49:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:49:03,804 INFO L445 BasicCegarLoop]: Path program histogram: [19, 13, 11, 10, 8, 7, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:03,807 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 20:49:03,807 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 20:49:03,813 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 20:49:03,813 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 20:49:03,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 08:49:03 BasicIcfg [2024-06-27 20:49:03,815 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 20:49:03,815 INFO L158 Benchmark]: Toolchain (without parser) took 137026.62ms. Allocated memory was 138.4MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 60.2MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 238.7MB. Max. memory is 16.1GB. [2024-06-27 20:49:03,815 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 138.4MB. Free memory is still 100.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:49:03,815 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 138.4MB. Free memory was 108.2MB in the beginning and 108.0MB in the end (delta: 135.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:49:03,816 INFO L158 Benchmark]: CACSL2BoogieTranslator took 615.42ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 59.9MB in the beginning and 120.1MB in the end (delta: -60.1MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. [2024-06-27 20:49:03,825 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.83ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 117.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 20:49:03,825 INFO L158 Benchmark]: Boogie Preprocessor took 73.75ms. Allocated memory is still 167.8MB. Free memory was 117.0MB in the beginning and 112.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 20:49:03,826 INFO L158 Benchmark]: RCFGBuilder took 654.19ms. Allocated memory is still 167.8MB. Free memory was 112.8MB in the beginning and 59.4MB in the end (delta: 53.4MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2024-06-27 20:49:03,826 INFO L158 Benchmark]: TraceAbstraction took 135625.73ms. Allocated memory was 167.8MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 59.4MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 207.2MB. Max. memory is 16.1GB. [2024-06-27 20:49:03,827 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.14ms. Allocated memory is still 138.4MB. Free memory is still 100.0MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 138.4MB. Free memory was 108.2MB in the beginning and 108.0MB in the end (delta: 135.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 615.42ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 59.9MB in the beginning and 120.1MB in the end (delta: -60.1MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.83ms. Allocated memory is still 167.8MB. Free memory was 120.1MB in the beginning and 117.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.75ms. Allocated memory is still 167.8MB. Free memory was 117.0MB in the beginning and 112.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 654.19ms. Allocated memory is still 167.8MB. Free memory was 112.8MB in the beginning and 59.4MB in the end (delta: 53.4MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. * TraceAbstraction took 135625.73ms. Allocated memory was 167.8MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 59.4MB in the beginning and 1.1GB in the end (delta: -1.1GB). Peak memory consumption was 207.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 826]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 827]: 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: 135.5s, OverallIterations: 103, TraceHistogramMax: 1, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 38.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5890 SdHoareTripleChecker+Valid, 22.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4929 mSDsluCounter, 3576 SdHoareTripleChecker+Invalid, 19.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3235 mSDsCounter, 920 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37483 IncrementalHoareTripleChecker+Invalid, 38403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 920 mSolverCounterUnsat, 341 mSDtfsCounter, 37483 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1093 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 30.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1491occurred in iteration=68, InterpolantAutomatonStates: 960, 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, 0.8s SatisfiabilityAnalysisTime, 95.1s InterpolantComputationTime, 1677 NumberOfCodeBlocks, 1677 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 1574 ConstructedInterpolants, 0 QuantifiedInterpolants, 78359 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 103 InterpolantComputations, 103 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! [2024-06-27 20:49:03,875 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