./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.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/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.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/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.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 20:37:20,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:37:20,868 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:37:20,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:37:20,873 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:37:20,912 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:37:20,913 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:37:20,913 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:37:20,913 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:37:20,914 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:37:20,914 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:37:20,914 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:37:20,914 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:37:20,915 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:37:20,915 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:37:20,915 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:37:20,915 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:37:20,916 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:37:20,916 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:37:20,916 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:37:20,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:37:20,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:37:20,919 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:37:20,919 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:37:20,920 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:37:20,924 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:37:20,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:37:20,924 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:37:20,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:37:20,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:37:20,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:37:20,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:37:20,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:37:20,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:37:20,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:37:20,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:37:20,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:37:20,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:37:20,926 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:37:20,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:37:20,926 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:37:20,927 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:37:20,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:37:20,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:37:21,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:37:21,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:37:21,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:37:21,159 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:37:21,159 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:37:21,160 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 20:37:21,316 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:37:21,316 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:37:21,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-27 20:37:22,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:37:22,559 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:37:22,559 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-27 20:37:22,572 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9800b044c/e93080345b7d47a4ad43af44938df3de/FLAG3ebc22fbc [2024-06-27 20:37:22,582 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9800b044c/e93080345b7d47a4ad43af44938df3de [2024-06-27 20:37:22,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:37:22,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:37:22,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:37:22,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:37:22,589 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:37:22,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:37:21" (1/2) ... [2024-06-27 20:37:22,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45300842 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:37:22, skipping insertion in model container [2024-06-27 20:37:22,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:37:21" (1/2) ... [2024-06-27 20:37:22,591 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36ea0a37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:37:22, skipping insertion in model container [2024-06-27 20:37:22,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:37:22" (2/2) ... [2024-06-27 20:37:22,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45300842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:22, skipping insertion in model container [2024-06-27 20:37:22,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:37:22" (2/2) ... [2024-06-27 20:37:22,592 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:37:22,637 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:37:22,638 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] (((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1)) [2024-06-27 20:37:22,638 INFO L97 edCorrectnessWitness]: Location invariant before [L809-L809] (((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1)) [2024-06-27 20:37:22,638 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:37:22,639 INFO L106 edCorrectnessWitness]: ghost_update [L806-L806] multithreaded = 1; [2024-06-27 20:37:22,679 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:37:22,991 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:37:23,003 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:37:23,076 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:37:23,099 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:37:23,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23 WrapperNode [2024-06-27 20:37:23,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:37:23,101 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:37:23,101 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:37:23,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:37:23,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,140 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 112 [2024-06-27 20:37:23,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:37:23,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:37:23,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:37:23,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:37:23,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,152 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,176 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 20:37:23,176 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,200 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:37:23,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:37:23,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:37:23,201 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:37:23,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (1/1) ... [2024-06-27 20:37:23,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:37:23,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:37:23,249 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 20:37:23,277 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 20:37:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:37:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:37:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:37:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:37:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:37:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:37:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:37:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:37:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:37:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:37:23,315 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 20:37:23,439 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:37:23,441 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:37:23,689 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:37:23,689 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:37:23,859 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:37:23,860 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:37:23,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:37:23 BoogieIcfgContainer [2024-06-27 20:37:23,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:37:23,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:37:23,865 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:37:23,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:37:23,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:37:21" (1/4) ... [2024-06-27 20:37:23,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347cd00d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:37:23, skipping insertion in model container [2024-06-27 20:37:23,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:37:22" (2/4) ... [2024-06-27 20:37:23,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347cd00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:37:23, skipping insertion in model container [2024-06-27 20:37:23,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:37:23" (3/4) ... [2024-06-27 20:37:23,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347cd00d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:37:23, skipping insertion in model container [2024-06-27 20:37:23,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:37:23" (4/4) ... [2024-06-27 20:37:23,873 INFO L112 eAbstractionObserver]: Analyzing ICFG mix054_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-27 20:37:23,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:37:23,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 20:37:23,887 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:37:23,927 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:37:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-27 20:37:23,983 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-27 20:37:23,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:37:23,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:37:23,985 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-27 20:37:23,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-27 20:37:24,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:37:24,015 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;@569c8c09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:37:24,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 20:37:24,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:37:24,018 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:37:24,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:37:24,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:24,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:37:24,019 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 20:37:24,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash 322901022, now seen corresponding path program 1 times [2024-06-27 20:37:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:24,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441297977] [2024-06-27 20:37:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:24,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:24,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:24,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441297977] [2024-06-27 20:37:24,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441297977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:24,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:24,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:37:24,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748398357] [2024-06-27 20:37:24,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:37:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:37:24,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:37:24,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 20:37:24,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 20:37:24,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:24,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 20:37:24,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:24,910 INFO L124 PetriNetUnfolderBase]: 162/296 cut-off events. [2024-06-27 20:37:24,910 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 20:37:24,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 296 events. 162/296 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1017 event pairs, 97 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 596. Up to 288 conditions per place. [2024-06-27 20:37:24,915 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-27 20:37:24,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 111 flow [2024-06-27 20:37:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:37:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:37:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-06-27 20:37:24,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-06-27 20:37:24,925 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 50 transitions. [2024-06-27 20:37:24,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 111 flow [2024-06-27 20:37:24,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 20:37:24,928 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-27 20:37:24,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-27 20:37:24,932 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-27 20:37:24,932 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-27 20:37:24,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states 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 20:37:24,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:24,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:37:24,933 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 20:37:24,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:24,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1070392915, now seen corresponding path program 1 times [2024-06-27 20:37:24,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:24,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966892012] [2024-06-27 20:37:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:24,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:25,250 INFO 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 20:37:25,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:25,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966892012] [2024-06-27 20:37:25,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966892012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:25,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:37:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814223757] [2024-06-27 20:37:25,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:25,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:37:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:37:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:37:25,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 20:37:25,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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 20:37:25,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:25,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 20:37:25,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:25,335 INFO L124 PetriNetUnfolderBase]: 159/291 cut-off events. [2024-06-27 20:37:25,336 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-27 20:37:25,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 679 conditions, 291 events. 159/291 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 998 event pairs, 79 based on Foata normal form. 2/293 useless extension candidates. Maximal degree in co-relation 667. Up to 274 conditions per place. [2024-06-27 20:37:25,338 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-27 20:37:25,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 153 flow [2024-06-27 20:37:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:37:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:37:25,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-06-27 20:37:25,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-06-27 20:37:25,339 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 64 transitions. [2024-06-27 20:37:25,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 153 flow [2024-06-27 20:37:25,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:37:25,341 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-27 20:37:25,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-06-27 20:37:25,342 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-27 20:37:25,342 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-27 20:37:25,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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 20:37:25,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:25,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:25,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:37:25,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:37:25,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:25,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1177557569, now seen corresponding path program 1 times [2024-06-27 20:37:25,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:25,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465502301] [2024-06-27 20:37:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:25,630 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 20:37:25,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465502301] [2024-06-27 20:37:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465502301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:25,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:25,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:37:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181216189] [2024-06-27 20:37:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:25,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:37:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:37:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:37:25,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 20:37:25,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 20:37:25,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:25,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 20:37:25,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:25,752 INFO L124 PetriNetUnfolderBase]: 188/339 cut-off events. [2024-06-27 20:37:25,752 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2024-06-27 20:37:25,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 339 events. 188/339 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1236 event pairs, 62 based on Foata normal form. 5/344 useless extension candidates. Maximal degree in co-relation 850. Up to 260 conditions per place. [2024-06-27 20:37:25,755 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 37 selfloop transitions, 11 changer transitions 0/51 dead transitions. [2024-06-27 20:37:25,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 261 flow [2024-06-27 20:37:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:37:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:37:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 20:37:25,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068965517241379 [2024-06-27 20:37:25,756 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 88 transitions. [2024-06-27 20:37:25,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 261 flow [2024-06-27 20:37:25,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 51 transitions, 252 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 20:37:25,758 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 160 flow [2024-06-27 20:37:25,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-06-27 20:37:25,759 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-27 20:37:25,759 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 160 flow [2024-06-27 20:37:25,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 20:37:25,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:25,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:25,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:37:25,760 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 20:37:25,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:25,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2011893340, now seen corresponding path program 1 times [2024-06-27 20:37:25,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:25,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151677525] [2024-06-27 20:37:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:25,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:26,190 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 20:37:26,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:26,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151677525] [2024-06-27 20:37:26,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151677525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:26,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:26,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:37:26,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901111026] [2024-06-27 20:37:26,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:26,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:37:26,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:26,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:37:26,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:37:26,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 20:37:26,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 20:37:26,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:26,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 20:37:26,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:26,355 INFO L124 PetriNetUnfolderBase]: 189/341 cut-off events. [2024-06-27 20:37:26,356 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2024-06-27 20:37:26,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 341 events. 189/341 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1229 event pairs, 44 based on Foata normal form. 3/344 useless extension candidates. Maximal degree in co-relation 1076. Up to 283 conditions per place. [2024-06-27 20:37:26,358 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 42 selfloop transitions, 14 changer transitions 0/59 dead transitions. [2024-06-27 20:37:26,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 59 transitions, 368 flow [2024-06-27 20:37:26,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 20:37:26,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-06-27 20:37:26,360 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 160 flow. Second operand 6 states and 99 transitions. [2024-06-27 20:37:26,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 59 transitions, 368 flow [2024-06-27 20:37:26,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 364 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 20:37:26,363 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 256 flow [2024-06-27 20:37:26,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-06-27 20:37:26,363 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-27 20:37:26,363 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 256 flow [2024-06-27 20:37:26,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 20:37:26,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:26,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:26,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:37:26,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 20:37:26,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2056410050, now seen corresponding path program 1 times [2024-06-27 20:37:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:26,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672238120] [2024-06-27 20:37:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:26,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:26,825 INFO 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 20:37:26,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:26,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672238120] [2024-06-27 20:37:26,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672238120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:26,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:26,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415632350] [2024-06-27 20:37:26,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:26,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:26,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:26,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-27 20:37:26,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 256 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:26,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:26,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-27 20:37:26,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:27,064 INFO L124 PetriNetUnfolderBase]: 190/344 cut-off events. [2024-06-27 20:37:27,064 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2024-06-27 20:37:27,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 344 events. 190/344 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1245 event pairs, 25 based on Foata normal form. 6/350 useless extension candidates. Maximal degree in co-relation 1249. Up to 260 conditions per place. [2024-06-27 20:37:27,066 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 42 selfloop transitions, 16 changer transitions 0/61 dead transitions. [2024-06-27 20:37:27,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 432 flow [2024-06-27 20:37:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:37:27,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369458128078818 [2024-06-27 20:37:27,068 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 256 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:37:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 432 flow [2024-06-27 20:37:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 416 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 20:37:27,071 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 275 flow [2024-06-27 20:37:27,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-27 20:37:27,071 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-27 20:37:27,072 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 275 flow [2024-06-27 20:37:27,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:27,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:27,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:27,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:37:27,072 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 20:37:27,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2073240141, now seen corresponding path program 1 times [2024-06-27 20:37:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:27,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004196005] [2024-06-27 20:37:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:27,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:27,426 INFO 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 20:37:27,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:27,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004196005] [2024-06-27 20:37:27,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004196005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:37:27,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517674740] [2024-06-27 20:37:27,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:37:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:37:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:37:27,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:27,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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 20:37:27,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:27,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:27,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:27,647 INFO L124 PetriNetUnfolderBase]: 184/335 cut-off events. [2024-06-27 20:37:27,648 INFO L125 PetriNetUnfolderBase]: For 825/825 co-relation queries the response was YES. [2024-06-27 20:37:27,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 335 events. 184/335 cut-off events. For 825/825 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1194 event pairs, 38 based on Foata normal form. 3/338 useless extension candidates. Maximal degree in co-relation 1301. Up to 318 conditions per place. [2024-06-27 20:37:27,650 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 40 selfloop transitions, 7 changer transitions 0/49 dead transitions. [2024-06-27 20:37:27,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 393 flow [2024-06-27 20:37:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:37:27,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:37:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-06-27 20:37:27,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-27 20:37:27,651 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 275 flow. Second operand 5 states and 60 transitions. [2024-06-27 20:37:27,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 393 flow [2024-06-27 20:37:27,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 352 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:27,654 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 268 flow [2024-06-27 20:37:27,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 20:37:27,655 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-27 20:37:27,655 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 268 flow [2024-06-27 20:37:27,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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 20:37:27,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:27,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:37:27,655 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 20:37:27,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 454051128, now seen corresponding path program 1 times [2024-06-27 20:37:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:27,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404096633] [2024-06-27 20:37:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:28,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404096633] [2024-06-27 20:37:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404096633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776389222] [2024-06-27 20:37:28,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:28,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:28,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:28,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:28,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:28,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:28,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:28,187 INFO L124 PetriNetUnfolderBase]: 187/341 cut-off events. [2024-06-27 20:37:28,187 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-27 20:37:28,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 341 events. 187/341 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1232 event pairs, 41 based on Foata normal form. 6/347 useless extension candidates. Maximal degree in co-relation 1308. Up to 256 conditions per place. [2024-06-27 20:37:28,189 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 41 selfloop transitions, 16 changer transitions 0/59 dead transitions. [2024-06-27 20:37:28,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 454 flow [2024-06-27 20:37:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-06-27 20:37:28,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4540229885057471 [2024-06-27 20:37:28,191 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 268 flow. Second operand 6 states and 79 transitions. [2024-06-27 20:37:28,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 454 flow [2024-06-27 20:37:28,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 440 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:28,193 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 326 flow [2024-06-27 20:37:28,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 20:37:28,194 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-27 20:37:28,194 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 326 flow [2024-06-27 20:37:28,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:28,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:28,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:28,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:37:28,195 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 20:37:28,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:28,195 INFO L85 PathProgramCache]: Analyzing trace with hash 481070418, now seen corresponding path program 2 times [2024-06-27 20:37:28,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:28,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627705690] [2024-06-27 20:37:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:28,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627705690] [2024-06-27 20:37:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627705690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:28,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:28,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:37:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044118590] [2024-06-27 20:37:28,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:28,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:37:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:37:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:37:28,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:28,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:28,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:28,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:28,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:28,708 INFO L124 PetriNetUnfolderBase]: 176/321 cut-off events. [2024-06-27 20:37:28,709 INFO L125 PetriNetUnfolderBase]: For 1072/1072 co-relation queries the response was YES. [2024-06-27 20:37:28,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 321 events. 176/321 cut-off events. For 1072/1072 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1114 event pairs, 40 based on Foata normal form. 3/324 useless extension candidates. Maximal degree in co-relation 1284. Up to 301 conditions per place. [2024-06-27 20:37:28,711 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 43 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2024-06-27 20:37:28,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 451 flow [2024-06-27 20:37:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-27 20:37:28,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-27 20:37:28,712 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 326 flow. Second operand 6 states and 69 transitions. [2024-06-27 20:37:28,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 451 flow [2024-06-27 20:37:28,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 432 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:28,715 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 331 flow [2024-06-27 20:37:28,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-27 20:37:28,715 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-27 20:37:28,715 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 331 flow [2024-06-27 20:37:28,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:28,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:28,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:28,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:37:28,716 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 20:37:28,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:28,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1197350210, now seen corresponding path program 1 times [2024-06-27 20:37:28,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:28,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865485127] [2024-06-27 20:37:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:28,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865485127] [2024-06-27 20:37:29,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865485127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:29,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:29,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410544997] [2024-06-27 20:37:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:29,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:29,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:29,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:29,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:29,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:29,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 20:37:29,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:29,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:29,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:29,504 INFO L124 PetriNetUnfolderBase]: 172/315 cut-off events. [2024-06-27 20:37:29,504 INFO L125 PetriNetUnfolderBase]: For 1188/1188 co-relation queries the response was YES. [2024-06-27 20:37:29,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 315 events. 172/315 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1092 event pairs, 32 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 1269. Up to 290 conditions per place. [2024-06-27 20:37:29,507 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 45 selfloop transitions, 10 changer transitions 0/57 dead transitions. [2024-06-27 20:37:29,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 473 flow [2024-06-27 20:37:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 20:37:29,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-27 20:37:29,508 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 331 flow. Second operand 7 states and 78 transitions. [2024-06-27 20:37:29,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 473 flow [2024-06-27 20:37:29,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 57 transitions, 428 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:29,511 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 327 flow [2024-06-27 20:37:29,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=327, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-06-27 20:37:29,512 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 29 predicate places. [2024-06-27 20:37:29,512 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 327 flow [2024-06-27 20:37:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 20:37:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:29,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:29,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:37:29,513 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 20:37:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2059801544, now seen corresponding path program 1 times [2024-06-27 20:37:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:29,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176478433] [2024-06-27 20:37:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:30,325 INFO 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 20:37:30,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:30,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176478433] [2024-06-27 20:37:30,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176478433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:30,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:30,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:30,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19897116] [2024-06-27 20:37:30,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:30,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:30,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 327 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 20:37:30,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:30,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:30,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:30,582 INFO L124 PetriNetUnfolderBase]: 169/310 cut-off events. [2024-06-27 20:37:30,583 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2024-06-27 20:37:30,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 310 events. 169/310 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1061 event pairs, 31 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1256. Up to 287 conditions per place. [2024-06-27 20:37:30,585 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 46 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-06-27 20:37:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 457 flow [2024-06-27 20:37:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-27 20:37:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2024-06-27 20:37:30,587 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 327 flow. Second operand 7 states and 76 transitions. [2024-06-27 20:37:30,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 457 flow [2024-06-27 20:37:30,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 427 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:30,590 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 319 flow [2024-06-27 20:37:30,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=319, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-06-27 20:37:30,592 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-27 20:37:30,593 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 319 flow [2024-06-27 20:37:30,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 20:37:30,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:30,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:30,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:37:30,593 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 20:37:30,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1821458127, now seen corresponding path program 1 times [2024-06-27 20:37:30,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:30,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819825207] [2024-06-27 20:37:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:30,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:31,011 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 20:37:31,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:31,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819825207] [2024-06-27 20:37:31,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819825207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:31,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:31,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:31,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248963949] [2024-06-27 20:37:31,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:31,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:31,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:31,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:31,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:31,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:31,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 319 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 20:37:31,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:31,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:31,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:31,188 INFO L124 PetriNetUnfolderBase]: 172/315 cut-off events. [2024-06-27 20:37:31,188 INFO L125 PetriNetUnfolderBase]: For 1356/1356 co-relation queries the response was YES. [2024-06-27 20:37:31,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313 conditions, 315 events. 172/315 cut-off events. For 1356/1356 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1094 event pairs, 36 based on Foata normal form. 1/316 useless extension candidates. Maximal degree in co-relation 1283. Up to 253 conditions per place. [2024-06-27 20:37:31,190 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 48 selfloop transitions, 16 changer transitions 0/66 dead transitions. [2024-06-27 20:37:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 525 flow [2024-06-27 20:37:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-27 20:37:31,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:37:31,193 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 319 flow. Second operand 7 states and 87 transitions. [2024-06-27 20:37:31,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 525 flow [2024-06-27 20:37:31,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 66 transitions, 503 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:31,196 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 362 flow [2024-06-27 20:37:31,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2024-06-27 20:37:31,197 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 33 predicate places. [2024-06-27 20:37:31,197 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 362 flow [2024-06-27 20:37:31,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 20:37:31,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:31,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:31,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:37:31,198 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 20:37:31,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1778123919, now seen corresponding path program 2 times [2024-06-27 20:37:31,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:31,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461628916] [2024-06-27 20:37:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:31,638 INFO 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 20:37:31,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461628916] [2024-06-27 20:37:31,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461628916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:31,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:31,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:31,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153890612] [2024-06-27 20:37:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:31,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:31,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:31,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:31,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 362 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 20:37:31,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:31,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:31,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:31,843 INFO L124 PetriNetUnfolderBase]: 170/312 cut-off events. [2024-06-27 20:37:31,844 INFO L125 PetriNetUnfolderBase]: For 1524/1524 co-relation queries the response was YES. [2024-06-27 20:37:31,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 312 events. 170/312 cut-off events. For 1524/1524 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1084 event pairs, 36 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1319. Up to 266 conditions per place. [2024-06-27 20:37:31,846 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 46 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2024-06-27 20:37:31,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 63 transitions, 515 flow [2024-06-27 20:37:31,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 20:37:31,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088669950738916 [2024-06-27 20:37:31,847 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 362 flow. Second operand 7 states and 83 transitions. [2024-06-27 20:37:31,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 63 transitions, 515 flow [2024-06-27 20:37:31,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 482 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:31,853 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 371 flow [2024-06-27 20:37:31,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-06-27 20:37:31,855 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2024-06-27 20:37:31,855 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 371 flow [2024-06-27 20:37:31,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 20:37:31,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:31,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:37:31,856 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 20:37:31,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1540416326, now seen corresponding path program 1 times [2024-06-27 20:37:31,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:31,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200303953] [2024-06-27 20:37:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:31,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:32,339 INFO 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 20:37:32,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:32,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200303953] [2024-06-27 20:37:32,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200303953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:32,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:32,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:37:32,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136494583] [2024-06-27 20:37:32,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:32,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:37:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:32,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:37:32,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:37:32,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:32,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 371 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 20:37:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:32,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:32,537 INFO L124 PetriNetUnfolderBase]: 166/306 cut-off events. [2024-06-27 20:37:32,537 INFO L125 PetriNetUnfolderBase]: For 1677/1677 co-relation queries the response was YES. [2024-06-27 20:37:32,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 306 events. 166/306 cut-off events. For 1677/1677 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1056 event pairs, 31 based on Foata normal form. 2/308 useless extension candidates. Maximal degree in co-relation 1298. Up to 209 conditions per place. [2024-06-27 20:37:32,539 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 45 selfloop transitions, 23 changer transitions 0/70 dead transitions. [2024-06-27 20:37:32,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 555 flow [2024-06-27 20:37:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:37:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:37:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-27 20:37:32,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2024-06-27 20:37:32,540 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 371 flow. Second operand 6 states and 83 transitions. [2024-06-27 20:37:32,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 555 flow [2024-06-27 20:37:32,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 521 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:32,544 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 413 flow [2024-06-27 20:37:32,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-06-27 20:37:32,545 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-06-27 20:37:32,545 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 413 flow [2024-06-27 20:37:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 20:37:32,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:32,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:37:32,546 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 20:37:32,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash 630625065, now seen corresponding path program 1 times [2024-06-27 20:37:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:32,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99429035] [2024-06-27 20:37:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:32,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:33,040 INFO 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 20:37:33,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99429035] [2024-06-27 20:37:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99429035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:33,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023755038] [2024-06-27 20:37:33,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:33,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:33,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:33,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 413 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:33,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:33,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:33,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:33,317 INFO L124 PetriNetUnfolderBase]: 170/314 cut-off events. [2024-06-27 20:37:33,317 INFO L125 PetriNetUnfolderBase]: For 2070/2070 co-relation queries the response was YES. [2024-06-27 20:37:33,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 314 events. 170/314 cut-off events. For 2070/2070 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1105 event pairs, 17 based on Foata normal form. 2/316 useless extension candidates. Maximal degree in co-relation 1388. Up to 210 conditions per place. [2024-06-27 20:37:33,319 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 51 selfloop transitions, 20 changer transitions 0/73 dead transitions. [2024-06-27 20:37:33,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 627 flow [2024-06-27 20:37:33,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-27 20:37:33,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-27 20:37:33,320 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 413 flow. Second operand 8 states and 95 transitions. [2024-06-27 20:37:33,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 627 flow [2024-06-27 20:37:33,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 576 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:33,326 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 414 flow [2024-06-27 20:37:33,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=414, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-06-27 20:37:33,327 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-27 20:37:33,327 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 414 flow [2024-06-27 20:37:33,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:33,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:33,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:37:33,328 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 20:37:33,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash -21528169, now seen corresponding path program 2 times [2024-06-27 20:37:33,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:33,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024391607] [2024-06-27 20:37:33,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:33,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:33,862 INFO 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 20:37:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024391607] [2024-06-27 20:37:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024391607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072944991] [2024-06-27 20:37:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:33,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:33,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 414 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:33,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:33,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:34,058 INFO L124 PetriNetUnfolderBase]: 174/322 cut-off events. [2024-06-27 20:37:34,059 INFO L125 PetriNetUnfolderBase]: For 1973/1973 co-relation queries the response was YES. [2024-06-27 20:37:34,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 322 events. 174/322 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1160 event pairs, 33 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 1414. Up to 255 conditions per place. [2024-06-27 20:37:34,060 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 52 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-06-27 20:37:34,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 598 flow [2024-06-27 20:37:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-27 20:37:34,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-27 20:37:34,062 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 414 flow. Second operand 8 states and 95 transitions. [2024-06-27 20:37:34,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 598 flow [2024-06-27 20:37:34,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 557 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:34,066 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 423 flow [2024-06-27 20:37:34,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2024-06-27 20:37:34,066 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-06-27 20:37:34,066 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 423 flow [2024-06-27 20:37:34,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:34,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:34,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:34,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:37:34,067 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 20:37:34,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash -21528045, now seen corresponding path program 1 times [2024-06-27 20:37:34,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:34,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574430553] [2024-06-27 20:37:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:34,666 INFO 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 20:37:34,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574430553] [2024-06-27 20:37:34,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574430553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:34,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:34,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823720953] [2024-06-27 20:37:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:34,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:34,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:34,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 423 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:34,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:34,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:34,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:34,937 INFO L124 PetriNetUnfolderBase]: 180/332 cut-off events. [2024-06-27 20:37:34,937 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2024-06-27 20:37:34,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 332 events. 180/332 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1199 event pairs, 29 based on Foata normal form. 2/334 useless extension candidates. Maximal degree in co-relation 1459. Up to 188 conditions per place. [2024-06-27 20:37:34,940 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 53 selfloop transitions, 25 changer transitions 0/80 dead transitions. [2024-06-27 20:37:34,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 683 flow [2024-06-27 20:37:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-27 20:37:34,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44396551724137934 [2024-06-27 20:37:34,942 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 423 flow. Second operand 8 states and 103 transitions. [2024-06-27 20:37:34,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 683 flow [2024-06-27 20:37:34,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 647 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:34,948 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 478 flow [2024-06-27 20:37:34,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=478, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-06-27 20:37:34,949 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-27 20:37:34,949 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 478 flow [2024-06-27 20:37:34,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:34,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:34,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:37:34,950 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 20:37:34,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 633429139, now seen corresponding path program 2 times [2024-06-27 20:37:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:34,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259947882] [2024-06-27 20:37:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:35,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259947882] [2024-06-27 20:37:35,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259947882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:35,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:35,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279836119] [2024-06-27 20:37:35,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:35,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:35,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:35,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 478 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:35,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:35,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:35,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:35,869 INFO L124 PetriNetUnfolderBase]: 186/342 cut-off events. [2024-06-27 20:37:35,869 INFO L125 PetriNetUnfolderBase]: For 2648/2648 co-relation queries the response was YES. [2024-06-27 20:37:35,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 342 events. 186/342 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1250 event pairs, 30 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 1562. Up to 259 conditions per place. [2024-06-27 20:37:35,871 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 56 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-27 20:37:35,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 680 flow [2024-06-27 20:37:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-27 20:37:35,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-27 20:37:35,873 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 478 flow. Second operand 8 states and 97 transitions. [2024-06-27 20:37:35,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 680 flow [2024-06-27 20:37:35,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 639 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:35,880 INFO L231 Difference]: Finished difference. Result has 77 places, 63 transitions, 504 flow [2024-06-27 20:37:35,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=504, PETRI_PLACES=77, PETRI_TRANSITIONS=63} [2024-06-27 20:37:35,881 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-27 20:37:35,881 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 63 transitions, 504 flow [2024-06-27 20:37:35,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:35,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:35,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:35,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:37:35,882 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 20:37:35,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 633424489, now seen corresponding path program 3 times [2024-06-27 20:37:35,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:35,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401666664] [2024-06-27 20:37:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:35,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:36,536 INFO 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 20:37:36,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401666664] [2024-06-27 20:37:36,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401666664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:36,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:36,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229833058] [2024-06-27 20:37:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:36,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:36,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:36,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:36,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 63 transitions, 504 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:36,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:36,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:36,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:36,854 INFO L124 PetriNetUnfolderBase]: 192/352 cut-off events. [2024-06-27 20:37:36,855 INFO L125 PetriNetUnfolderBase]: For 3010/3010 co-relation queries the response was YES. [2024-06-27 20:37:36,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 352 events. 192/352 cut-off events. For 3010/3010 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1300 event pairs, 28 based on Foata normal form. 2/354 useless extension candidates. Maximal degree in co-relation 1655. Up to 238 conditions per place. [2024-06-27 20:37:36,857 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 26 changer transitions 0/81 dead transitions. [2024-06-27 20:37:36,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 720 flow [2024-06-27 20:37:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-27 20:37:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2024-06-27 20:37:36,858 INFO L175 Difference]: Start difference. First operand has 77 places, 63 transitions, 504 flow. Second operand 8 states and 101 transitions. [2024-06-27 20:37:36,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 720 flow [2024-06-27 20:37:36,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 81 transitions, 668 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:36,867 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 535 flow [2024-06-27 20:37:36,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=535, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-06-27 20:37:36,867 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-27 20:37:36,868 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 535 flow [2024-06-27 20:37:36,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:36,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:36,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:36,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:37:36,869 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 20:37:36,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:36,870 INFO L85 PathProgramCache]: Analyzing trace with hash 633424365, now seen corresponding path program 3 times [2024-06-27 20:37:36,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658437194] [2024-06-27 20:37:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:37,344 INFO 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 20:37:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:37,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658437194] [2024-06-27 20:37:37,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658437194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:37,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:37,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806113239] [2024-06-27 20:37:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:37,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:37,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 535 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:37,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:37,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:37,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:37,546 INFO L124 PetriNetUnfolderBase]: 189/347 cut-off events. [2024-06-27 20:37:37,546 INFO L125 PetriNetUnfolderBase]: For 3119/3119 co-relation queries the response was YES. [2024-06-27 20:37:37,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 347 events. 189/347 cut-off events. For 3119/3119 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1283 event pairs, 31 based on Foata normal form. 2/349 useless extension candidates. Maximal degree in co-relation 1640. Up to 295 conditions per place. [2024-06-27 20:37:37,548 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 59 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-27 20:37:37,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 77 transitions, 713 flow [2024-06-27 20:37:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-27 20:37:37,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-27 20:37:37,550 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 535 flow. Second operand 8 states and 92 transitions. [2024-06-27 20:37:37,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 77 transitions, 713 flow [2024-06-27 20:37:37,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 650 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:37,556 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 508 flow [2024-06-27 20:37:37,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=508, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-06-27 20:37:37,557 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-27 20:37:37,557 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 508 flow [2024-06-27 20:37:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:37,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:37,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:37:37,557 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 20:37:37,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1664303401, now seen corresponding path program 4 times [2024-06-27 20:37:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721362279] [2024-06-27 20:37:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:38,203 INFO 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 20:37:38,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:38,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721362279] [2024-06-27 20:37:38,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721362279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:38,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:38,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:38,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910343283] [2024-06-27 20:37:38,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:38,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:38,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:38,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:38,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 508 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:38,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:38,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:38,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:38,492 INFO L124 PetriNetUnfolderBase]: 195/357 cut-off events. [2024-06-27 20:37:38,492 INFO L125 PetriNetUnfolderBase]: For 3338/3338 co-relation queries the response was YES. [2024-06-27 20:37:38,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 357 events. 195/357 cut-off events. For 3338/3338 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1323 event pairs, 26 based on Foata normal form. 2/359 useless extension candidates. Maximal degree in co-relation 1662. Up to 227 conditions per place. [2024-06-27 20:37:38,494 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 58 selfloop transitions, 30 changer transitions 0/90 dead transitions. [2024-06-27 20:37:38,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 800 flow [2024-06-27 20:37:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-06-27 20:37:38,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698275862068966 [2024-06-27 20:37:38,495 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 508 flow. Second operand 8 states and 109 transitions. [2024-06-27 20:37:38,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 800 flow [2024-06-27 20:37:38,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 759 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:38,502 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 558 flow [2024-06-27 20:37:38,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=558, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-27 20:37:38,502 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-27 20:37:38,502 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 558 flow [2024-06-27 20:37:38,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:38,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:38,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:38,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:37:38,503 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 20:37:38,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash 748720309, now seen corresponding path program 5 times [2024-06-27 20:37:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:38,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874513371] [2024-06-27 20:37:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:39,214 INFO 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 20:37:39,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:39,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874513371] [2024-06-27 20:37:39,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874513371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:39,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:39,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:39,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059635859] [2024-06-27 20:37:39,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:39,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:39,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:39,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:39,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:39,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:39,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:39,530 INFO L124 PetriNetUnfolderBase]: 207/377 cut-off events. [2024-06-27 20:37:39,530 INFO L125 PetriNetUnfolderBase]: For 3828/3828 co-relation queries the response was YES. [2024-06-27 20:37:39,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1867 conditions, 377 events. 207/377 cut-off events. For 3828/3828 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1418 event pairs, 29 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 1828. Up to 290 conditions per place. [2024-06-27 20:37:39,533 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 23 changer transitions 0/89 dead transitions. [2024-06-27 20:37:39,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 824 flow [2024-06-27 20:37:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:39,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-27 20:37:39,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2024-06-27 20:37:39,534 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 558 flow. Second operand 8 states and 101 transitions. [2024-06-27 20:37:39,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 824 flow [2024-06-27 20:37:39,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 89 transitions, 733 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:39,542 INFO L231 Difference]: Finished difference. Result has 84 places, 71 transitions, 572 flow [2024-06-27 20:37:39,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=572, PETRI_PLACES=84, PETRI_TRANSITIONS=71} [2024-06-27 20:37:39,543 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-27 20:37:39,543 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 71 transitions, 572 flow [2024-06-27 20:37:39,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:39,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:39,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:39,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:37:39,544 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 20:37:39,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 748900233, now seen corresponding path program 1 times [2024-06-27 20:37:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:39,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107847731] [2024-06-27 20:37:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:40,310 INFO 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 20:37:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107847731] [2024-06-27 20:37:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107847731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:40,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734167636] [2024-06-27 20:37:40,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:40,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:40,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 71 transitions, 572 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:40,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:40,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:40,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:40,563 INFO L124 PetriNetUnfolderBase]: 215/393 cut-off events. [2024-06-27 20:37:40,564 INFO L125 PetriNetUnfolderBase]: For 4560/4560 co-relation queries the response was YES. [2024-06-27 20:37:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 393 events. 215/393 cut-off events. For 4560/4560 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1527 event pairs, 29 based on Foata normal form. 4/397 useless extension candidates. Maximal degree in co-relation 1841. Up to 302 conditions per place. [2024-06-27 20:37:40,566 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 64 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-27 20:37:40,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 788 flow [2024-06-27 20:37:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-27 20:37:40,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-27 20:37:40,567 INFO L175 Difference]: Start difference. First operand has 84 places, 71 transitions, 572 flow. Second operand 8 states and 97 transitions. [2024-06-27 20:37:40,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 788 flow [2024-06-27 20:37:40,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 727 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:40,576 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 576 flow [2024-06-27 20:37:40,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2024-06-27 20:37:40,577 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-06-27 20:37:40,577 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 576 flow [2024-06-27 20:37:40,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:40,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:40,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:40,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:37:40,577 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 20:37:40,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:40,578 INFO L85 PathProgramCache]: Analyzing trace with hash 748893289, now seen corresponding path program 6 times [2024-06-27 20:37:40,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:40,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727296399] [2024-06-27 20:37:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:41,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727296399] [2024-06-27 20:37:41,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727296399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:41,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:41,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:41,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122215072] [2024-06-27 20:37:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:41,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:41,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 73 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:41,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:41,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:41,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:41,528 INFO L124 PetriNetUnfolderBase]: 221/403 cut-off events. [2024-06-27 20:37:41,528 INFO L125 PetriNetUnfolderBase]: For 4451/4451 co-relation queries the response was YES. [2024-06-27 20:37:41,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 403 events. 221/403 cut-off events. For 4451/4451 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1566 event pairs, 31 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1906. Up to 316 conditions per place. [2024-06-27 20:37:41,530 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 66 selfloop transitions, 21 changer transitions 0/89 dead transitions. [2024-06-27 20:37:41,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 812 flow [2024-06-27 20:37:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-27 20:37:41,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-27 20:37:41,532 INFO L175 Difference]: Start difference. First operand has 87 places, 73 transitions, 576 flow. Second operand 8 states and 95 transitions. [2024-06-27 20:37:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 812 flow [2024-06-27 20:37:41,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 763 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:41,542 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 608 flow [2024-06-27 20:37:41,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=608, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-06-27 20:37:41,543 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-27 20:37:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 608 flow [2024-06-27 20:37:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:41,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:41,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:41,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:37:41,544 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 20:37:41,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -54939319, now seen corresponding path program 2 times [2024-06-27 20:37:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726668537] [2024-06-27 20:37:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:42,365 INFO 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 20:37:42,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:42,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726668537] [2024-06-27 20:37:42,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726668537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:42,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:42,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31399920] [2024-06-27 20:37:42,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:42,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:42,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:42,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 608 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:42,637 INFO L124 PetriNetUnfolderBase]: 228/416 cut-off events. [2024-06-27 20:37:42,637 INFO L125 PetriNetUnfolderBase]: For 4850/4850 co-relation queries the response was YES. [2024-06-27 20:37:42,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 416 events. 228/416 cut-off events. For 4850/4850 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1621 event pairs, 33 based on Foata normal form. 2/418 useless extension candidates. Maximal degree in co-relation 1971. Up to 381 conditions per place. [2024-06-27 20:37:42,640 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 75 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-27 20:37:42,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 91 transitions, 839 flow [2024-06-27 20:37:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-27 20:37:42,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362068965517243 [2024-06-27 20:37:42,641 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 608 flow. Second operand 8 states and 89 transitions. [2024-06-27 20:37:42,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 91 transitions, 839 flow [2024-06-27 20:37:42,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 763 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:42,651 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 613 flow [2024-06-27 20:37:42,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=613, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2024-06-27 20:37:42,652 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2024-06-27 20:37:42,652 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 613 flow [2024-06-27 20:37:42,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:42,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:42,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:42,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:37:42,653 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 20:37:42,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash -389083135, now seen corresponding path program 3 times [2024-06-27 20:37:42,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:42,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884179414] [2024-06-27 20:37:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:42,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:43,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:43,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884179414] [2024-06-27 20:37:43,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884179414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:43,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:43,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592442386] [2024-06-27 20:37:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:43,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:43,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:43,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 613 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:43,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:43,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:43,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:43,713 INFO L124 PetriNetUnfolderBase]: 232/424 cut-off events. [2024-06-27 20:37:43,713 INFO L125 PetriNetUnfolderBase]: For 5246/5246 co-relation queries the response was YES. [2024-06-27 20:37:43,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039 conditions, 424 events. 232/424 cut-off events. For 5246/5246 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1678 event pairs, 31 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 1996. Up to 393 conditions per place. [2024-06-27 20:37:43,717 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 78 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-27 20:37:43,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 91 transitions, 825 flow [2024-06-27 20:37:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-27 20:37:43,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-27 20:37:43,718 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 613 flow. Second operand 8 states and 85 transitions. [2024-06-27 20:37:43,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 91 transitions, 825 flow [2024-06-27 20:37:43,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 794 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:43,730 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 622 flow [2024-06-27 20:37:43,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=622, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2024-06-27 20:37:43,731 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-27 20:37:43,731 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 622 flow [2024-06-27 20:37:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:43,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:43,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:43,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:37:43,732 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 20:37:43,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -389379805, now seen corresponding path program 4 times [2024-06-27 20:37:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:43,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994881081] [2024-06-27 20:37:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:43,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:44,375 INFO 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 20:37:44,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:44,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994881081] [2024-06-27 20:37:44,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994881081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:44,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:44,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:44,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396273407] [2024-06-27 20:37:44,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:44,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:44,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:44,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:44,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:44,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 622 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:44,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:44,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:44,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:44,653 INFO L124 PetriNetUnfolderBase]: 229/419 cut-off events. [2024-06-27 20:37:44,653 INFO L125 PetriNetUnfolderBase]: For 5067/5067 co-relation queries the response was YES. [2024-06-27 20:37:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1974 conditions, 419 events. 229/419 cut-off events. For 5067/5067 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1655 event pairs, 32 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 1930. Up to 385 conditions per place. [2024-06-27 20:37:44,655 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 75 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-27 20:37:44,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 91 transitions, 824 flow [2024-06-27 20:37:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-27 20:37:44,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:37:44,669 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 622 flow. Second operand 8 states and 87 transitions. [2024-06-27 20:37:44,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 91 transitions, 824 flow [2024-06-27 20:37:44,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 91 transitions, 794 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:44,680 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 625 flow [2024-06-27 20:37:44,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=625, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2024-06-27 20:37:44,680 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 70 predicate places. [2024-06-27 20:37:44,681 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 625 flow [2024-06-27 20:37:44,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 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 20:37:44,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:44,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:44,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:37:44,681 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 20:37:44,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash -397660959, now seen corresponding path program 7 times [2024-06-27 20:37:44,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:44,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744211739] [2024-06-27 20:37:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:44,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:45,383 INFO 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 20:37:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:45,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744211739] [2024-06-27 20:37:45,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744211739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:45,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:45,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665323723] [2024-06-27 20:37:45,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:45,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:45,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:45,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:45,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 625 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:45,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:45,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:45,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:45,639 INFO L124 PetriNetUnfolderBase]: 225/413 cut-off events. [2024-06-27 20:37:45,639 INFO L125 PetriNetUnfolderBase]: For 4829/4829 co-relation queries the response was YES. [2024-06-27 20:37:45,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1898 conditions, 413 events. 225/413 cut-off events. For 4829/4829 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1637 event pairs, 27 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 1853. Up to 273 conditions per place. [2024-06-27 20:37:45,641 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 61 selfloop transitions, 37 changer transitions 0/100 dead transitions. [2024-06-27 20:37:45,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 873 flow [2024-06-27 20:37:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-27 20:37:45,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-06-27 20:37:45,642 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 625 flow. Second operand 7 states and 98 transitions. [2024-06-27 20:37:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 873 flow [2024-06-27 20:37:45,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 100 transitions, 810 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:45,655 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 651 flow [2024-06-27 20:37:45,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=651, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2024-06-27 20:37:45,655 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 70 predicate places. [2024-06-27 20:37:45,655 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 651 flow [2024-06-27 20:37:45,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 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 20:37:45,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:45,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:45,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:37:45,656 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 20:37:45,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 533143985, now seen corresponding path program 1 times [2024-06-27 20:37:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:45,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821332434] [2024-06-27 20:37:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821332434] [2024-06-27 20:37:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821332434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:46,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:46,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:46,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936939651] [2024-06-27 20:37:46,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:46,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:46,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:46,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:46,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 651 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:46,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:46,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:46,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:46,553 INFO L124 PetriNetUnfolderBase]: 252/474 cut-off events. [2024-06-27 20:37:46,553 INFO L125 PetriNetUnfolderBase]: For 9127/9127 co-relation queries the response was YES. [2024-06-27 20:37:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 474 events. 252/474 cut-off events. For 9127/9127 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1982 event pairs, 36 based on Foata normal form. 8/482 useless extension candidates. Maximal degree in co-relation 2218. Up to 149 conditions per place. [2024-06-27 20:37:46,573 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 56 selfloop transitions, 37 changer transitions 12/107 dead transitions. [2024-06-27 20:37:46,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 107 transitions, 991 flow [2024-06-27 20:37:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-27 20:37:46,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-06-27 20:37:46,574 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 651 flow. Second operand 9 states and 114 transitions. [2024-06-27 20:37:46,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 107 transitions, 991 flow [2024-06-27 20:37:46,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 909 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:46,587 INFO L231 Difference]: Finished difference. Result has 101 places, 79 transitions, 639 flow [2024-06-27 20:37:46,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=639, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2024-06-27 20:37:46,588 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 73 predicate places. [2024-06-27 20:37:46,588 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 639 flow [2024-06-27 20:37:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:46,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:46,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:37:46,588 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 20:37:46,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:46,589 INFO L85 PathProgramCache]: Analyzing trace with hash 533234195, now seen corresponding path program 2 times [2024-06-27 20:37:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:46,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850973007] [2024-06-27 20:37:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:47,276 INFO 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 20:37:47,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:47,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850973007] [2024-06-27 20:37:47,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850973007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:47,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:47,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:47,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847086399] [2024-06-27 20:37:47,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:47,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:47,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:47,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:47,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 639 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:47,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:47,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:47,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:47,573 INFO L124 PetriNetUnfolderBase]: 248/470 cut-off events. [2024-06-27 20:37:47,573 INFO L125 PetriNetUnfolderBase]: For 9131/9131 co-relation queries the response was YES. [2024-06-27 20:37:47,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233 conditions, 470 events. 248/470 cut-off events. For 9131/9131 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1959 event pairs, 46 based on Foata normal form. 10/480 useless extension candidates. Maximal degree in co-relation 2187. Up to 256 conditions per place. [2024-06-27 20:37:47,577 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 50 selfloop transitions, 36 changer transitions 14/102 dead transitions. [2024-06-27 20:37:47,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 913 flow [2024-06-27 20:37:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-27 20:37:47,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329501915708812 [2024-06-27 20:37:47,578 INFO L175 Difference]: Start difference. First operand has 101 places, 79 transitions, 639 flow. Second operand 9 states and 113 transitions. [2024-06-27 20:37:47,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 913 flow [2024-06-27 20:37:47,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 102 transitions, 852 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:47,590 INFO L231 Difference]: Finished difference. Result has 100 places, 76 transitions, 633 flow [2024-06-27 20:37:47,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=633, PETRI_PLACES=100, PETRI_TRANSITIONS=76} [2024-06-27 20:37:47,591 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-06-27 20:37:47,591 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 76 transitions, 633 flow [2024-06-27 20:37:47,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:47,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:47,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:47,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:37:47,592 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 20:37:47,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash -243121811, now seen corresponding path program 3 times [2024-06-27 20:37:47,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:47,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632685233] [2024-06-27 20:37:47,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:47,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:48,156 INFO 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 20:37:48,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:48,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632685233] [2024-06-27 20:37:48,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632685233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412775151] [2024-06-27 20:37:48,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:48,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:48,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:48,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:48,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:48,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 76 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:48,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:48,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:48,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:48,511 INFO L124 PetriNetUnfolderBase]: 236/450 cut-off events. [2024-06-27 20:37:48,513 INFO L125 PetriNetUnfolderBase]: For 7856/7856 co-relation queries the response was YES. [2024-06-27 20:37:48,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 450 events. 236/450 cut-off events. For 7856/7856 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1873 event pairs, 36 based on Foata normal form. 8/458 useless extension candidates. Maximal degree in co-relation 2144. Up to 246 conditions per place. [2024-06-27 20:37:48,515 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 45 selfloop transitions, 34 changer transitions 17/98 dead transitions. [2024-06-27 20:37:48,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 98 transitions, 891 flow [2024-06-27 20:37:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-27 20:37:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421455938697318 [2024-06-27 20:37:48,517 INFO L175 Difference]: Start difference. First operand has 100 places, 76 transitions, 633 flow. Second operand 9 states and 110 transitions. [2024-06-27 20:37:48,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 98 transitions, 891 flow [2024-06-27 20:37:48,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 98 transitions, 815 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:48,530 INFO L231 Difference]: Finished difference. Result has 98 places, 73 transitions, 606 flow [2024-06-27 20:37:48,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=606, PETRI_PLACES=98, PETRI_TRANSITIONS=73} [2024-06-27 20:37:48,530 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 70 predicate places. [2024-06-27 20:37:48,531 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 73 transitions, 606 flow [2024-06-27 20:37:48,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:48,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:48,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:48,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:37:48,531 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 20:37:48,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:48,532 INFO L85 PathProgramCache]: Analyzing trace with hash -611937829, now seen corresponding path program 4 times [2024-06-27 20:37:48,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:48,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329287006] [2024-06-27 20:37:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:48,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:49,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:49,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329287006] [2024-06-27 20:37:49,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329287006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:49,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:49,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:49,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081149553] [2024-06-27 20:37:49,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:49,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:49,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:49,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:49,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 73 transitions, 606 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:49,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:49,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:49,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:49,727 INFO L124 PetriNetUnfolderBase]: 244/470 cut-off events. [2024-06-27 20:37:49,728 INFO L125 PetriNetUnfolderBase]: For 9321/9321 co-relation queries the response was YES. [2024-06-27 20:37:49,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 470 events. 244/470 cut-off events. For 9321/9321 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1980 event pairs, 51 based on Foata normal form. 16/486 useless extension candidates. Maximal degree in co-relation 2174. Up to 288 conditions per place. [2024-06-27 20:37:49,736 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 57 selfloop transitions, 23 changer transitions 13/95 dead transitions. [2024-06-27 20:37:49,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 95 transitions, 877 flow [2024-06-27 20:37:49,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:49,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-27 20:37:49,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2024-06-27 20:37:49,738 INFO L175 Difference]: Start difference. First operand has 98 places, 73 transitions, 606 flow. Second operand 9 states and 111 transitions. [2024-06-27 20:37:49,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 95 transitions, 877 flow [2024-06-27 20:37:49,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 799 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:49,750 INFO L231 Difference]: Finished difference. Result has 95 places, 71 transitions, 594 flow [2024-06-27 20:37:49,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=594, PETRI_PLACES=95, PETRI_TRANSITIONS=71} [2024-06-27 20:37:49,750 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2024-06-27 20:37:49,750 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 71 transitions, 594 flow [2024-06-27 20:37:49,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:49,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:49,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:37:49,751 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 20:37:49,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash -239546891, now seen corresponding path program 5 times [2024-06-27 20:37:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303869817] [2024-06-27 20:37:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:50,336 INFO 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 20:37:50,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:50,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303869817] [2024-06-27 20:37:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303869817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:50,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139899660] [2024-06-27 20:37:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:50,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:50,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:50,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:50,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 71 transitions, 594 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:50,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:50,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:50,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:50,612 INFO L124 PetriNetUnfolderBase]: 247/483 cut-off events. [2024-06-27 20:37:50,612 INFO L125 PetriNetUnfolderBase]: For 8297/8297 co-relation queries the response was YES. [2024-06-27 20:37:50,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2415 conditions, 483 events. 247/483 cut-off events. For 8297/8297 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2068 event pairs, 55 based on Foata normal form. 8/491 useless extension candidates. Maximal degree in co-relation 2372. Up to 266 conditions per place. [2024-06-27 20:37:50,614 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 27 changer transitions 10/96 dead transitions. [2024-06-27 20:37:50,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 96 transitions, 912 flow [2024-06-27 20:37:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-27 20:37:50,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061302681992337 [2024-06-27 20:37:50,616 INFO L175 Difference]: Start difference. First operand has 95 places, 71 transitions, 594 flow. Second operand 9 states and 115 transitions. [2024-06-27 20:37:50,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 96 transitions, 912 flow [2024-06-27 20:37:50,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 96 transitions, 872 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:50,625 INFO L231 Difference]: Finished difference. Result has 94 places, 69 transitions, 601 flow [2024-06-27 20:37:50,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=601, PETRI_PLACES=94, PETRI_TRANSITIONS=69} [2024-06-27 20:37:50,626 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-27 20:37:50,626 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 69 transitions, 601 flow [2024-06-27 20:37:50,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:50,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:50,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:50,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:37:50,626 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 20:37:50,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash 619926005, now seen corresponding path program 6 times [2024-06-27 20:37:50,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:50,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890224728] [2024-06-27 20:37:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:50,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:51,261 INFO 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 20:37:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890224728] [2024-06-27 20:37:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890224728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:51,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:51,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:51,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894718988] [2024-06-27 20:37:51,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:51,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:51,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:51,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:51,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:51,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 69 transitions, 601 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:51,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:51,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:51,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:51,559 INFO L124 PetriNetUnfolderBase]: 216/422 cut-off events. [2024-06-27 20:37:51,559 INFO L125 PetriNetUnfolderBase]: For 6102/6102 co-relation queries the response was YES. [2024-06-27 20:37:51,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 422 events. 216/422 cut-off events. For 6102/6102 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1717 event pairs, 46 based on Foata normal form. 10/432 useless extension candidates. Maximal degree in co-relation 1985. Up to 266 conditions per place. [2024-06-27 20:37:51,561 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 46 selfloop transitions, 23 changer transitions 18/89 dead transitions. [2024-06-27 20:37:51,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 89 transitions, 841 flow [2024-06-27 20:37:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-27 20:37:51,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2024-06-27 20:37:51,562 INFO L175 Difference]: Start difference. First operand has 94 places, 69 transitions, 601 flow. Second operand 9 states and 109 transitions. [2024-06-27 20:37:51,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 89 transitions, 841 flow [2024-06-27 20:37:51,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 785 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:51,571 INFO L231 Difference]: Finished difference. Result has 93 places, 63 transitions, 545 flow [2024-06-27 20:37:51,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=545, PETRI_PLACES=93, PETRI_TRANSITIONS=63} [2024-06-27 20:37:51,572 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-06-27 20:37:51,572 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 63 transitions, 545 flow [2024-06-27 20:37:51,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:51,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:51,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:51,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:37:51,572 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 20:37:51,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1735345995, now seen corresponding path program 7 times [2024-06-27 20:37:51,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:51,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900291453] [2024-06-27 20:37:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:51,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:52,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900291453] [2024-06-27 20:37:52,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900291453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:52,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:52,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629055424] [2024-06-27 20:37:52,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:52,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:52,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:52,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 63 transitions, 545 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:52,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:52,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:52,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:52,464 INFO L124 PetriNetUnfolderBase]: 182/348 cut-off events. [2024-06-27 20:37:52,464 INFO L125 PetriNetUnfolderBase]: For 5110/5110 co-relation queries the response was YES. [2024-06-27 20:37:52,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1703 conditions, 348 events. 182/348 cut-off events. For 5110/5110 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1314 event pairs, 34 based on Foata normal form. 8/356 useless extension candidates. Maximal degree in co-relation 1662. Up to 105 conditions per place. [2024-06-27 20:37:52,466 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 40 selfloop transitions, 34 changer transitions 7/83 dead transitions. [2024-06-27 20:37:52,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 83 transitions, 809 flow [2024-06-27 20:37:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-27 20:37:52,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2024-06-27 20:37:52,486 INFO L175 Difference]: Start difference. First operand has 93 places, 63 transitions, 545 flow. Second operand 9 states and 107 transitions. [2024-06-27 20:37:52,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 83 transitions, 809 flow [2024-06-27 20:37:52,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 736 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:37:52,492 INFO L231 Difference]: Finished difference. Result has 87 places, 61 transitions, 533 flow [2024-06-27 20:37:52,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=87, PETRI_TRANSITIONS=61} [2024-06-27 20:37:52,493 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-06-27 20:37:52,493 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 61 transitions, 533 flow [2024-06-27 20:37:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:52,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:52,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:52,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:37:52,494 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 20:37:52,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:52,495 INFO L85 PathProgramCache]: Analyzing trace with hash -101015021, now seen corresponding path program 8 times [2024-06-27 20:37:52,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:52,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995260762] [2024-06-27 20:37:52,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:52,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:53,131 INFO 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 20:37:53,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:53,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995260762] [2024-06-27 20:37:53,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995260762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:53,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:53,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:53,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691996285] [2024-06-27 20:37:53,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:53,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:53,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:53,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:53,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 61 transitions, 533 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:53,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:53,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:53,437 INFO L124 PetriNetUnfolderBase]: 180/346 cut-off events. [2024-06-27 20:37:53,437 INFO L125 PetriNetUnfolderBase]: For 4461/4461 co-relation queries the response was YES. [2024-06-27 20:37:53,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 346 events. 180/346 cut-off events. For 4461/4461 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1337 event pairs, 38 based on Foata normal form. 10/356 useless extension candidates. Maximal degree in co-relation 1633. Up to 182 conditions per place. [2024-06-27 20:37:53,440 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 34 selfloop transitions, 31 changer transitions 12/79 dead transitions. [2024-06-27 20:37:53,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 749 flow [2024-06-27 20:37:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-27 20:37:53,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-27 20:37:53,445 INFO L175 Difference]: Start difference. First operand has 87 places, 61 transitions, 533 flow. Second operand 9 states and 106 transitions. [2024-06-27 20:37:53,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 749 flow [2024-06-27 20:37:53,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 79 transitions, 685 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:53,451 INFO L231 Difference]: Finished difference. Result has 86 places, 57 transitions, 497 flow [2024-06-27 20:37:53,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=497, PETRI_PLACES=86, PETRI_TRANSITIONS=57} [2024-06-27 20:37:53,451 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-27 20:37:53,451 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 57 transitions, 497 flow [2024-06-27 20:37:53,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:53,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:53,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:53,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:37:53,452 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 20:37:53,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -100864919, now seen corresponding path program 1 times [2024-06-27 20:37:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:53,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948886678] [2024-06-27 20:37:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:54,193 INFO 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 20:37:54,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:54,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948886678] [2024-06-27 20:37:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948886678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:54,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:54,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:54,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958866716] [2024-06-27 20:37:54,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:54,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:54,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:54,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:54,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:54,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 57 transitions, 497 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:54,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:54,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:54,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:54,452 INFO L124 PetriNetUnfolderBase]: 159/303 cut-off events. [2024-06-27 20:37:54,453 INFO L125 PetriNetUnfolderBase]: For 3030/3030 co-relation queries the response was YES. [2024-06-27 20:37:54,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 303 events. 159/303 cut-off events. For 3030/3030 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1091 event pairs, 36 based on Foata normal form. 2/305 useless extension candidates. Maximal degree in co-relation 1481. Up to 236 conditions per place. [2024-06-27 20:37:54,454 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 51 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2024-06-27 20:37:54,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 70 transitions, 673 flow [2024-06-27 20:37:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-27 20:37:54,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-06-27 20:37:54,456 INFO L175 Difference]: Start difference. First operand has 86 places, 57 transitions, 497 flow. Second operand 8 states and 90 transitions. [2024-06-27 20:37:54,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 70 transitions, 673 flow [2024-06-27 20:37:54,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 598 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:37:54,462 INFO L231 Difference]: Finished difference. Result has 81 places, 58 transitions, 470 flow [2024-06-27 20:37:54,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=470, PETRI_PLACES=81, PETRI_TRANSITIONS=58} [2024-06-27 20:37:54,463 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-27 20:37:54,463 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 58 transitions, 470 flow [2024-06-27 20:37:54,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:54,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:54,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:54,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:37:54,463 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 20:37:54,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -95300729, now seen corresponding path program 2 times [2024-06-27 20:37:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:54,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979269426] [2024-06-27 20:37:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:54,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:55,244 INFO 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 20:37:55,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:55,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979269426] [2024-06-27 20:37:55,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979269426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:55,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:55,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500568329] [2024-06-27 20:37:55,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:55,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:55,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:55,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 58 transitions, 470 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:55,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:55,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:55,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:55,538 INFO L124 PetriNetUnfolderBase]: 163/311 cut-off events. [2024-06-27 20:37:55,538 INFO L125 PetriNetUnfolderBase]: For 2662/2662 co-relation queries the response was YES. [2024-06-27 20:37:55,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 311 events. 163/311 cut-off events. For 2662/2662 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1139 event pairs, 33 based on Foata normal form. 2/313 useless extension candidates. Maximal degree in co-relation 1453. Up to 227 conditions per place. [2024-06-27 20:37:55,539 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 48 selfloop transitions, 21 changer transitions 0/71 dead transitions. [2024-06-27 20:37:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 71 transitions, 650 flow [2024-06-27 20:37:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-27 20:37:55,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-27 20:37:55,540 INFO L175 Difference]: Start difference. First operand has 81 places, 58 transitions, 470 flow. Second operand 8 states and 92 transitions. [2024-06-27 20:37:55,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 71 transitions, 650 flow [2024-06-27 20:37:55,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 71 transitions, 612 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:55,545 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 490 flow [2024-06-27 20:37:55,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=490, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2024-06-27 20:37:55,545 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2024-06-27 20:37:55,545 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 490 flow [2024-06-27 20:37:55,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:55,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:55,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:55,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:37:55,546 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 20:37:55,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:55,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1741071447, now seen corresponding path program 3 times [2024-06-27 20:37:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63449588] [2024-06-27 20:37:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:56,388 INFO 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 20:37:56,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:56,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63449588] [2024-06-27 20:37:56,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63449588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:56,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:56,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:56,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039388017] [2024-06-27 20:37:56,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:56,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:56,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:56,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:56,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:56,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:56,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 490 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:56,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:56,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:56,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:56,558 INFO L124 PetriNetUnfolderBase]: 167/319 cut-off events. [2024-06-27 20:37:56,558 INFO L125 PetriNetUnfolderBase]: For 3108/3108 co-relation queries the response was YES. [2024-06-27 20:37:56,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1554 conditions, 319 events. 167/319 cut-off events. For 3108/3108 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1181 event pairs, 35 based on Foata normal form. 2/321 useless extension candidates. Maximal degree in co-relation 1517. Up to 205 conditions per place. [2024-06-27 20:37:56,559 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 47 selfloop transitions, 23 changer transitions 0/72 dead transitions. [2024-06-27 20:37:56,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 72 transitions, 672 flow [2024-06-27 20:37:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:56,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-27 20:37:56,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-27 20:37:56,560 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 490 flow. Second operand 8 states and 92 transitions. [2024-06-27 20:37:56,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 72 transitions, 672 flow [2024-06-27 20:37:56,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 72 transitions, 633 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:56,565 INFO L231 Difference]: Finished difference. Result has 86 places, 60 transitions, 516 flow [2024-06-27 20:37:56,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=516, PETRI_PLACES=86, PETRI_TRANSITIONS=60} [2024-06-27 20:37:56,565 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-27 20:37:56,565 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 516 flow [2024-06-27 20:37:56,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:56,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:56,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:56,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:37:56,566 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 20:37:56,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1735493865, now seen corresponding path program 9 times [2024-06-27 20:37:56,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875948743] [2024-06-27 20:37:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:57,140 INFO 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 20:37:57,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875948743] [2024-06-27 20:37:57,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875948743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:57,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:57,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013808969] [2024-06-27 20:37:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:57,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:57,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:57,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 516 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:57,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:57,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:57,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:57,399 INFO L124 PetriNetUnfolderBase]: 183/355 cut-off events. [2024-06-27 20:37:57,400 INFO L125 PetriNetUnfolderBase]: For 4593/4593 co-relation queries the response was YES. [2024-06-27 20:37:57,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1690 conditions, 355 events. 183/355 cut-off events. For 4593/4593 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1408 event pairs, 40 based on Foata normal form. 10/365 useless extension candidates. Maximal degree in co-relation 1652. Up to 244 conditions per place. [2024-06-27 20:37:57,401 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 50 selfloop transitions, 15 changer transitions 11/78 dead transitions. [2024-06-27 20:37:57,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 78 transitions, 730 flow [2024-06-27 20:37:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-27 20:37:57,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-27 20:37:57,403 INFO L175 Difference]: Start difference. First operand has 86 places, 60 transitions, 516 flow. Second operand 9 states and 103 transitions. [2024-06-27 20:37:57,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 78 transitions, 730 flow [2024-06-27 20:37:57,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 78 transitions, 677 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:57,409 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 465 flow [2024-06-27 20:37:57,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=80, 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=9, PETRI_FLOW=465, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-06-27 20:37:57,409 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-27 20:37:57,409 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 465 flow [2024-06-27 20:37:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:57,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:57,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:57,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:37:57,410 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 20:37:57,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash -95508491, now seen corresponding path program 10 times [2024-06-27 20:37:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:57,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467265206] [2024-06-27 20:37:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:58,150 INFO 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 20:37:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:58,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467265206] [2024-06-27 20:37:58,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467265206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:58,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628497948] [2024-06-27 20:37:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:58,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:58,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:58,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:58,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:58,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 465 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:58,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:58,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:58,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:58,452 INFO L124 PetriNetUnfolderBase]: 181/361 cut-off events. [2024-06-27 20:37:58,452 INFO L125 PetriNetUnfolderBase]: For 5868/5868 co-relation queries the response was YES. [2024-06-27 20:37:58,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1639 conditions, 361 events. 181/361 cut-off events. For 5868/5868 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1469 event pairs, 46 based on Foata normal form. 16/377 useless extension candidates. Maximal degree in co-relation 1600. Up to 220 conditions per place. [2024-06-27 20:37:58,453 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 44 selfloop transitions, 11 changer transitions 17/74 dead transitions. [2024-06-27 20:37:58,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 667 flow [2024-06-27 20:37:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-27 20:37:58,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38697318007662834 [2024-06-27 20:37:58,454 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 465 flow. Second operand 9 states and 101 transitions. [2024-06-27 20:37:58,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 667 flow [2024-06-27 20:37:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 631 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:58,460 INFO L231 Difference]: Finished difference. Result has 87 places, 50 transitions, 393 flow [2024-06-27 20:37:58,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=87, PETRI_TRANSITIONS=50} [2024-06-27 20:37:58,461 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-06-27 20:37:58,461 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 50 transitions, 393 flow [2024-06-27 20:37:58,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:58,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:58,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:58,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:37:58,462 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 20:37:58,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:58,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1680367097, now seen corresponding path program 4 times [2024-06-27 20:37:58,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:58,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684994050] [2024-06-27 20:37:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:58,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:59,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:59,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684994050] [2024-06-27 20:37:59,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684994050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:59,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:59,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:59,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123653926] [2024-06-27 20:37:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:59,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:59,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:59,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:37:59,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 50 transitions, 393 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:59,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:59,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:37:59,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:59,374 INFO L124 PetriNetUnfolderBase]: 144/290 cut-off events. [2024-06-27 20:37:59,374 INFO L125 PetriNetUnfolderBase]: For 4018/4018 co-relation queries the response was YES. [2024-06-27 20:37:59,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 290 events. 144/290 cut-off events. For 4018/4018 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1073 event pairs, 35 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 1398. Up to 158 conditions per place. [2024-06-27 20:37:59,375 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 38 selfloop transitions, 23 changer transitions 0/63 dead transitions. [2024-06-27 20:37:59,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 63 transitions, 605 flow [2024-06-27 20:37:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:37:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:37:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-27 20:37:59,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088669950738916 [2024-06-27 20:37:59,377 INFO L175 Difference]: Start difference. First operand has 87 places, 50 transitions, 393 flow. Second operand 7 states and 83 transitions. [2024-06-27 20:37:59,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 63 transitions, 605 flow [2024-06-27 20:37:59,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 63 transitions, 565 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:59,382 INFO L231 Difference]: Finished difference. Result has 80 places, 52 transitions, 440 flow [2024-06-27 20:37:59,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=440, PETRI_PLACES=80, PETRI_TRANSITIONS=52} [2024-06-27 20:37:59,383 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 52 predicate places. [2024-06-27 20:37:59,383 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 52 transitions, 440 flow [2024-06-27 20:37:59,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:37:59,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:59,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:59,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:37:59,384 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 20:37:59,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1680359657, now seen corresponding path program 5 times [2024-06-27 20:37:59,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:59,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453096182] [2024-06-27 20:37:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:59,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:00,086 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 20:38:00,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:00,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453096182] [2024-06-27 20:38:00,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453096182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:00,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:00,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350804813] [2024-06-27 20:38:00,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:00,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:00,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:00,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:38:00,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 52 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:38:00,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:00,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:38:00,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:00,325 INFO L124 PetriNetUnfolderBase]: 141/285 cut-off events. [2024-06-27 20:38:00,325 INFO L125 PetriNetUnfolderBase]: For 3376/3376 co-relation queries the response was YES. [2024-06-27 20:38:00,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 285 events. 141/285 cut-off events. For 3376/3376 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1041 event pairs, 38 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 1356. Up to 196 conditions per place. [2024-06-27 20:38:00,328 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 38 selfloop transitions, 22 changer transitions 0/62 dead transitions. [2024-06-27 20:38:00,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 62 transitions, 586 flow [2024-06-27 20:38:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:38:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:38:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-27 20:38:00,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-06-27 20:38:00,329 INFO L175 Difference]: Start difference. First operand has 80 places, 52 transitions, 440 flow. Second operand 7 states and 82 transitions. [2024-06-27 20:38:00,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 62 transitions, 586 flow [2024-06-27 20:38:00,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 62 transitions, 551 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:38:00,334 INFO L231 Difference]: Finished difference. Result has 84 places, 52 transitions, 456 flow [2024-06-27 20:38:00,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=84, PETRI_TRANSITIONS=52} [2024-06-27 20:38:00,337 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-27 20:38:00,338 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 52 transitions, 456 flow [2024-06-27 20:38:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:38:00,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:00,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:00,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:38:00,341 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 20:38:00,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1423651385, now seen corresponding path program 11 times [2024-06-27 20:38:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:00,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585515732] [2024-06-27 20:38:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:00,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:01,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:01,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585515732] [2024-06-27 20:38:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585515732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:01,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:01,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:01,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14819224] [2024-06-27 20:38:01,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:01,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:01,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:01,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:38:01,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 52 transitions, 456 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:38:01,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:01,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:38:01,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:01,373 INFO L124 PetriNetUnfolderBase]: 136/282 cut-off events. [2024-06-27 20:38:01,374 INFO L125 PetriNetUnfolderBase]: For 4244/4244 co-relation queries the response was YES. [2024-06-27 20:38:01,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 282 events. 136/282 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1071 event pairs, 35 based on Foata normal form. 16/298 useless extension candidates. Maximal degree in co-relation 1200. Up to 113 conditions per place. [2024-06-27 20:38:01,375 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 29 selfloop transitions, 11 changer transitions 24/66 dead transitions. [2024-06-27 20:38:01,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 66 transitions, 624 flow [2024-06-27 20:38:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-27 20:38:01,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-27 20:38:01,376 INFO L175 Difference]: Start difference. First operand has 84 places, 52 transitions, 456 flow. Second operand 8 states and 94 transitions. [2024-06-27 20:38:01,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 66 transitions, 624 flow [2024-06-27 20:38:01,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 571 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:01,381 INFO L231 Difference]: Finished difference. Result has 86 places, 37 transitions, 289 flow [2024-06-27 20:38:01,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=37} [2024-06-27 20:38:01,381 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-27 20:38:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 37 transitions, 289 flow [2024-06-27 20:38:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:38:01,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:01,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:01,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:38:01,382 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 20:38:01,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1689563867, now seen corresponding path program 6 times [2024-06-27 20:38:01,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:01,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277187468] [2024-06-27 20:38:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:01,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:02,078 INFO 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 20:38:02,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277187468] [2024-06-27 20:38:02,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277187468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:02,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:02,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872038303] [2024-06-27 20:38:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:02,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:02,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:38:02,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 37 transitions, 289 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:38:02,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:02,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:38:02,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:02,290 INFO L124 PetriNetUnfolderBase]: 73/161 cut-off events. [2024-06-27 20:38:02,290 INFO L125 PetriNetUnfolderBase]: For 1670/1670 co-relation queries the response was YES. [2024-06-27 20:38:02,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 161 events. 73/161 cut-off events. For 1670/1670 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 482 event pairs, 20 based on Foata normal form. 2/163 useless extension candidates. Maximal degree in co-relation 680. Up to 122 conditions per place. [2024-06-27 20:38:02,291 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-27 20:38:02,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 47 transitions, 401 flow [2024-06-27 20:38:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:38:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:38:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-27 20:38:02,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-27 20:38:02,292 INFO L175 Difference]: Start difference. First operand has 86 places, 37 transitions, 289 flow. Second operand 7 states and 78 transitions. [2024-06-27 20:38:02,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 47 transitions, 401 flow [2024-06-27 20:38:02,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 47 transitions, 325 flow, removed 10 selfloop flow, removed 16 redundant places. [2024-06-27 20:38:02,294 INFO L231 Difference]: Finished difference. Result has 66 places, 37 transitions, 237 flow [2024-06-27 20:38:02,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=237, PETRI_PLACES=66, PETRI_TRANSITIONS=37} [2024-06-27 20:38:02,295 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2024-06-27 20:38:02,295 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 37 transitions, 237 flow [2024-06-27 20:38:02,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 20:38:02,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:02,296 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 20:38:02,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:38:02,296 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 20:38:02,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:02,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1861359256, now seen corresponding path program 1 times [2024-06-27 20:38:02,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:02,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795584062] [2024-06-27 20:38:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:02,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:03,142 INFO 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 20:38:03,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:03,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795584062] [2024-06-27 20:38:03,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795584062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:03,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:03,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:38:03,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056386005] [2024-06-27 20:38:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:03,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:38:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:38:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:38:03,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:38:03,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 37 transitions, 237 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:03,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:03,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:38:03,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:03,419 INFO L124 PetriNetUnfolderBase]: 81/181 cut-off events. [2024-06-27 20:38:03,419 INFO L125 PetriNetUnfolderBase]: For 1420/1420 co-relation queries the response was YES. [2024-06-27 20:38:03,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 181 events. 81/181 cut-off events. For 1420/1420 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 572 event pairs, 20 based on Foata normal form. 6/187 useless extension candidates. Maximal degree in co-relation 637. Up to 95 conditions per place. [2024-06-27 20:38:03,420 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 23 selfloop transitions, 3 changer transitions 24/52 dead transitions. [2024-06-27 20:38:03,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 52 transitions, 373 flow [2024-06-27 20:38:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-27 20:38:03,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-27 20:38:03,421 INFO L175 Difference]: Start difference. First operand has 66 places, 37 transitions, 237 flow. Second operand 9 states and 94 transitions. [2024-06-27 20:38:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 52 transitions, 373 flow [2024-06-27 20:38:03,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 52 transitions, 340 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:03,423 INFO L231 Difference]: Finished difference. Result has 68 places, 27 transitions, 151 flow [2024-06-27 20:38:03,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=27} [2024-06-27 20:38:03,424 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-27 20:38:03,424 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 27 transitions, 151 flow [2024-06-27 20:38:03,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:03,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:03,424 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 20:38:03,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:38:03,425 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 20:38:03,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:03,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1135648924, now seen corresponding path program 2 times [2024-06-27 20:38:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290664531] [2024-06-27 20:38:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:03,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:04,232 INFO 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 20:38:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290664531] [2024-06-27 20:38:04,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290664531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:04,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:04,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961333425] [2024-06-27 20:38:04,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:04,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:38:04,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 27 transitions, 151 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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 20:38:04,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:04,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:38:04,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:04,474 INFO L124 PetriNetUnfolderBase]: 55/126 cut-off events. [2024-06-27 20:38:04,474 INFO L125 PetriNetUnfolderBase]: For 1531/1531 co-relation queries the response was YES. [2024-06-27 20:38:04,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 126 events. 55/126 cut-off events. For 1531/1531 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 329 event pairs, 20 based on Foata normal form. 6/132 useless extension candidates. Maximal degree in co-relation 416. Up to 60 conditions per place. [2024-06-27 20:38:04,475 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 16 selfloop transitions, 3 changer transitions 16/37 dead transitions. [2024-06-27 20:38:04,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 37 transitions, 243 flow [2024-06-27 20:38:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-27 20:38:04,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-27 20:38:04,476 INFO L175 Difference]: Start difference. First operand has 68 places, 27 transitions, 151 flow. Second operand 8 states and 82 transitions. [2024-06-27 20:38:04,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 37 transitions, 243 flow [2024-06-27 20:38:04,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 37 transitions, 217 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 20:38:04,477 INFO L231 Difference]: Finished difference. Result has 51 places, 20 transitions, 90 flow [2024-06-27 20:38:04,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=90, PETRI_PLACES=51, PETRI_TRANSITIONS=20} [2024-06-27 20:38:04,478 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-06-27 20:38:04,478 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 20 transitions, 90 flow [2024-06-27 20:38:04,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 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 20:38:04,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:04,478 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 20:38:04,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:38:04,479 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 20:38:04,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:04,479 INFO L85 PathProgramCache]: Analyzing trace with hash 689787576, now seen corresponding path program 3 times [2024-06-27 20:38:04,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:04,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073777862] [2024-06-27 20:38:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:05,473 INFO 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 20:38:05,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073777862] [2024-06-27 20:38:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073777862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:05,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:05,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:38:05,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334298156] [2024-06-27 20:38:05,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:05,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:38:05,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:38:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:38:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-27 20:38:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 20 transitions, 90 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-27 20:38:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:05,695 INFO L124 PetriNetUnfolderBase]: 25/64 cut-off events. [2024-06-27 20:38:05,696 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-06-27 20:38:05,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 64 events. 25/64 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 3 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 162. Up to 24 conditions per place. [2024-06-27 20:38:05,696 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2024-06-27 20:38:05,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 26 transitions, 130 flow [2024-06-27 20:38:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2024-06-27 20:38:05,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3146551724137931 [2024-06-27 20:38:05,697 INFO L175 Difference]: Start difference. First operand has 51 places, 20 transitions, 90 flow. Second operand 8 states and 73 transitions. [2024-06-27 20:38:05,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 26 transitions, 130 flow [2024-06-27 20:38:05,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 26 transitions, 106 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-27 20:38:05,698 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2024-06-27 20:38:05,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2024-06-27 20:38:05,698 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-27 20:38:05,698 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2024-06-27 20:38:05,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:05,702 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-27 20:38:05,708 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-27 20:38:05,708 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-27 20:38:05,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-27 20:38:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:38:05,709 INFO L445 BasicCegarLoop]: Path program histogram: [11, 7, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:05,712 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 20:38:05,712 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 20:38:05,715 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-27 20:38:05,715 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-27 20:38:05,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 08:38:05 BasicIcfg [2024-06-27 20:38:05,716 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 20:38:05,716 INFO L158 Benchmark]: Toolchain (without parser) took 43132.95ms. Allocated memory was 172.0MB in the beginning and 673.2MB in the end (delta: 501.2MB). Free memory was 99.4MB in the beginning and 341.1MB in the end (delta: -241.6MB). Peak memory consumption was 262.3MB. Max. memory is 16.1GB. [2024-06-27 20:38:05,717 INFO L158 Benchmark]: Witness Parser took 0.09ms. Allocated memory is still 104.9MB. Free memory is still 73.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:38:05,717 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 172.0MB. Free memory is still 146.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 20:38:05,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 515.51ms. Allocated memory is still 172.0MB. Free memory was 99.2MB in the beginning and 123.4MB in the end (delta: -24.1MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2024-06-27 20:38:05,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.31ms. Allocated memory is still 172.0MB. Free memory was 123.4MB in the beginning and 120.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 20:38:05,717 INFO L158 Benchmark]: Boogie Preprocessor took 59.60ms. Allocated memory is still 172.0MB. Free memory was 120.5MB in the beginning and 117.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 20:38:05,718 INFO L158 Benchmark]: RCFGBuilder took 662.19ms. Allocated memory is still 172.0MB. Free memory was 117.1MB in the beginning and 139.4MB in the end (delta: -22.3MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. [2024-06-27 20:38:05,718 INFO L158 Benchmark]: TraceAbstraction took 41851.18ms. Allocated memory was 172.0MB in the beginning and 673.2MB in the end (delta: 501.2MB). Free memory was 139.4MB in the beginning and 341.1MB in the end (delta: -201.7MB). Peak memory consumption was 299.5MB. Max. memory is 16.1GB. [2024-06-27 20:38:05,722 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 0.09ms. Allocated memory is still 104.9MB. Free memory is still 73.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 172.0MB. Free memory is still 146.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 515.51ms. Allocated memory is still 172.0MB. Free memory was 99.2MB in the beginning and 123.4MB in the end (delta: -24.1MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.31ms. Allocated memory is still 172.0MB. Free memory was 123.4MB in the beginning and 120.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.60ms. Allocated memory is still 172.0MB. Free memory was 120.5MB in the beginning and 117.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 662.19ms. Allocated memory is still 172.0MB. Free memory was 117.1MB in the beginning and 139.4MB in the end (delta: -22.3MB). Peak memory consumption was 48.6MB. Max. memory is 16.1GB. * TraceAbstraction took 41851.18ms. Allocated memory was 172.0MB in the beginning and 673.2MB in the end (delta: 501.2MB). Free memory was 139.4MB in the beginning and 341.1MB in the end (delta: -201.7MB). Peak memory consumption was 299.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 808]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 809]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 46 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 41.8s, OverallIterations: 47, TraceHistogramMax: 1, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2577 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2145 mSDsluCounter, 1739 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1524 mSDsCounter, 569 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12132 IncrementalHoareTripleChecker+Invalid, 12701 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 569 mSolverCounterUnsat, 215 mSDtfsCounter, 12132 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 410 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 9.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=651occurred in iteration=27, InterpolantAutomatonStates: 355, 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, 0.4s SatisfiabilityAnalysisTime, 28.5s InterpolantComputationTime, 674 NumberOfCodeBlocks, 674 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 627 ConstructedInterpolants, 0 QuantifiedInterpolants, 24833 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 47 InterpolantComputations, 47 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 20:38:05,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE