./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:57:31,050 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:57:31,126 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:57:31,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:57:31,135 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:57:31,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:57:31,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:57:31,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:57:31,154 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:57:31,158 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:57:31,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:57:31,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:57:31,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:57:31,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:57:31,161 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:57:31,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:57:31,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:57:31,162 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:57:31,162 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:57:31,162 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:57:31,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:57:31,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:57:31,164 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:57:31,164 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:57:31,165 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:57:31,165 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:57:31,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:57:31,165 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:57:31,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:57:31,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:57:31,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:57:31,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:57:31,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:31,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:57:31,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:57:31,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:57:31,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:57:31,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:57:31,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:57:31,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:57:31,169 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:57:31,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:57:31,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:57:31,170 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:57:31,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:57:31,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:57:31,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:57:31,484 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:57:31,484 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:57:31,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 17:57:31,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:57:31,598 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:57:31,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:57:32,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:57:32,876 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:57:32,877 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:57:32,898 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6431b3b2/79f4cba101284291b675aa4445b83afb/FLAG9a668a2b7 [2024-06-21 17:57:32,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6431b3b2/79f4cba101284291b675aa4445b83afb [2024-06-21 17:57:32,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:57:32,912 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:57:32,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:57:32,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:57:32,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:57:32,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:31" (1/2) ... [2024-06-21 17:57:32,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9e7ad3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:32, skipping insertion in model container [2024-06-21 17:57:32,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:31" (1/2) ... [2024-06-21 17:57:32,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d58a3a1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:32, skipping insertion in model container [2024-06-21 17:57:32,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:32" (2/2) ... [2024-06-21 17:57:32,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b9e7ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:32, skipping insertion in model container [2024-06-21 17:57:32,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:32" (2/2) ... [2024-06-21 17:57:32,925 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:57:32,978 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:57:32,979 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-21 17:57:32,979 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((((((((! multithreaded || x$r_buff0_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0) [2024-06-21 17:57:32,979 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:57:32,980 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-21 17:57:33,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:57:33,327 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:57:33,336 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:57:33,430 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:57:33,462 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:57:33,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33 WrapperNode [2024-06-21 17:57:33,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:57:33,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:57:33,464 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:57:33,465 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:57:33,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,544 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-21 17:57:33,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:57:33,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:57:33,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:57:33,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:57:33,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,578 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,599 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:57:33,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,621 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,624 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,634 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:57:33,636 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:57:33,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:57:33,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:57:33,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (1/1) ... [2024-06-21 17:57:33,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:33,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:57:33,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:57:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:57:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:57:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:57:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:57:33,715 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:57:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:57:33,715 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:57:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:57:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:57:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:57:33,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:57:33,718 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:57:33,825 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:57:33,826 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:57:34,135 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:57:34,135 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:57:34,327 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:57:34,327 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:57:34,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:57:34 BoogieIcfgContainer [2024-06-21 17:57:34,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:57:34,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:57:34,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:57:34,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:57:34,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:31" (1/4) ... [2024-06-21 17:57:34,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185ac006 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:57:34, skipping insertion in model container [2024-06-21 17:57:34,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:57:32" (2/4) ... [2024-06-21 17:57:34,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185ac006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:57:34, skipping insertion in model container [2024-06-21 17:57:34,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:33" (3/4) ... [2024-06-21 17:57:34,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@185ac006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:57:34, skipping insertion in model container [2024-06-21 17:57:34,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:57:34" (4/4) ... [2024-06-21 17:57:34,338 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:57:34,354 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:57:34,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 17:57:34,355 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:57:34,400 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:57:34,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 17:57:34,468 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 17:57:34,469 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:57:34,471 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 38 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:57:34,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 17:57:34,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 17:57:34,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:57:34,497 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;@52bcb276, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:57:34,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 17:57:34,503 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:57:34,503 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:57:34,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:57:34,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:34,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:57:34,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:34,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash 320515457, now seen corresponding path program 1 times [2024-06-21 17:57:34,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:34,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858359612] [2024-06-21 17:57:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:34,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:35,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:35,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858359612] [2024-06-21 17:57:35,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858359612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:35,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:35,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:57:35,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012902212] [2024-06-21 17:57:35,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:35,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:57:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:57:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:57:35,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:35,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:35,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:35,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:35,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:35,424 INFO L124 PetriNetUnfolderBase]: 162/296 cut-off events. [2024-06-21 17:57:35,425 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 17:57:35,427 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 1026 event pairs, 97 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 596. Up to 288 conditions per place. [2024-06-21 17:57:35,430 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 17:57:35,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 111 flow [2024-06-21 17:57:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:57:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:57:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-21 17:57:35,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-06-21 17:57:35,444 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 47 transitions. [2024-06-21 17:57:35,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 111 flow [2024-06-21 17:57:35,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:35,448 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 17:57:35,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-21 17:57:35,453 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 17:57:35,454 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 17:57:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:35,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:35,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:57:35,455 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:35,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:35,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1221856444, now seen corresponding path program 1 times [2024-06-21 17:57:35,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:35,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596773069] [2024-06-21 17:57:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:35,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:35,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:35,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596773069] [2024-06-21 17:57:35,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596773069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:35,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:57:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966275070] [2024-06-21 17:57:35,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:35,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:57:35,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:57:35,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:57:35,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:35,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:35,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:35,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:35,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:36,025 INFO L124 PetriNetUnfolderBase]: 159/291 cut-off events. [2024-06-21 17:57:36,026 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-21 17:57:36,029 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 991 event pairs, 79 based on Foata normal form. 2/292 useless extension candidates. Maximal degree in co-relation 667. Up to 274 conditions per place. [2024-06-21 17:57:36,032 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-21 17:57:36,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 153 flow [2024-06-21 17:57:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:57:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:57:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-21 17:57:36,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-21 17:57:36,036 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 60 transitions. [2024-06-21 17:57:36,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 153 flow [2024-06-21 17:57:36,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:57:36,040 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-21 17:57:36,040 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} [2024-06-21 17:57:36,042 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-21 17:57:36,042 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-21 17:57:36,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:36,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:36,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:57:36,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:36,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 777156932, now seen corresponding path program 1 times [2024-06-21 17:57:36,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:36,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885781096] [2024-06-21 17:57:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:36,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885781096] [2024-06-21 17:57:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885781096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:36,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:57:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423759301] [2024-06-21 17:57:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:57:36,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:57:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:57:36,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:36,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:36,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:36,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:36,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:36,561 INFO L124 PetriNetUnfolderBase]: 153/281 cut-off events. [2024-06-21 17:57:36,561 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-21 17:57:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 281 events. 153/281 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 939 event pairs, 43 based on Foata normal form. 4/284 useless extension candidates. Maximal degree in co-relation 714. Up to 246 conditions per place. [2024-06-21 17:57:36,563 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-21 17:57:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 205 flow [2024-06-21 17:57:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:57:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:57:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-06-21 17:57:36,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-06-21 17:57:36,567 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 74 transitions. [2024-06-21 17:57:36,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 205 flow [2024-06-21 17:57:36,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:36,571 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 115 flow [2024-06-21 17:57:36,571 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=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-06-21 17:57:36,572 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-06-21 17:57:36,572 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 115 flow [2024-06-21 17:57:36,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:36,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:36,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:57:36,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash 384194663, now seen corresponding path program 1 times [2024-06-21 17:57:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:36,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888732855] [2024-06-21 17:57:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:37,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888732855] [2024-06-21 17:57:37,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888732855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:37,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:37,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338823173] [2024-06-21 17:57:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:37,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:37,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:37,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:37,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:37,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:37,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:37,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:37,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:37,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:37,631 INFO L124 PetriNetUnfolderBase]: 149/273 cut-off events. [2024-06-21 17:57:37,632 INFO L125 PetriNetUnfolderBase]: For 269/269 co-relation queries the response was YES. [2024-06-21 17:57:37,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 273 events. 149/273 cut-off events. For 269/269 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 895 event pairs, 24 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 756. Up to 220 conditions per place. [2024-06-21 17:57:37,634 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 30 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-06-21 17:57:37,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 219 flow [2024-06-21 17:57:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-21 17:57:37,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2024-06-21 17:57:37,638 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 115 flow. Second operand 6 states and 82 transitions. [2024-06-21 17:57:37,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 219 flow [2024-06-21 17:57:37,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 204 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:37,641 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 112 flow [2024-06-21 17:57:37,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2024-06-21 17:57:37,643 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-21 17:57:37,643 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 112 flow [2024-06-21 17:57:37,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:37,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:37,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:37,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:57:37,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:37,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -206677035, now seen corresponding path program 1 times [2024-06-21 17:57:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26176080] [2024-06-21 17:57:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:37,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26176080] [2024-06-21 17:57:38,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26176080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:38,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:38,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:57:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399740521] [2024-06-21 17:57:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:38,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:57:38,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:57:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:57:38,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:38,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:38,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:38,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:38,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:38,255 INFO L124 PetriNetUnfolderBase]: 147/270 cut-off events. [2024-06-21 17:57:38,255 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2024-06-21 17:57:38,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 270 events. 147/270 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 882 event pairs, 53 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 780. Up to 259 conditions per place. [2024-06-21 17:57:38,257 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-06-21 17:57:38,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 192 flow [2024-06-21 17:57:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:57:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:57:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-06-21 17:57:38,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-21 17:57:38,259 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 112 flow. Second operand 5 states and 53 transitions. [2024-06-21 17:57:38,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 192 flow [2024-06-21 17:57:38,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 172 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:38,265 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 119 flow [2024-06-21 17:57:38,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2024-06-21 17:57:38,270 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2024-06-21 17:57:38,271 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 119 flow [2024-06-21 17:57:38,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:38,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:57:38,273 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:38,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:38,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2112020171, now seen corresponding path program 1 times [2024-06-21 17:57:38,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:38,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617306615] [2024-06-21 17:57:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:38,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617306615] [2024-06-21 17:57:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617306615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776855900] [2024-06-21 17:57:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:38,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:38,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 119 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:38,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:38,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:38,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:38,909 INFO L124 PetriNetUnfolderBase]: 149/275 cut-off events. [2024-06-21 17:57:38,909 INFO L125 PetriNetUnfolderBase]: For 498/501 co-relation queries the response was YES. [2024-06-21 17:57:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 275 events. 149/275 cut-off events. For 498/501 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 921 event pairs, 52 based on Foata normal form. 4/277 useless extension candidates. Maximal degree in co-relation 822. Up to 237 conditions per place. [2024-06-21 17:57:38,911 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 27 selfloop transitions, 12 changer transitions 0/41 dead transitions. [2024-06-21 17:57:38,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 245 flow [2024-06-21 17:57:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-06-21 17:57:38,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 17:57:38,912 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 119 flow. Second operand 6 states and 66 transitions. [2024-06-21 17:57:38,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 245 flow [2024-06-21 17:57:38,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 234 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:38,914 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 176 flow [2024-06-21 17:57:38,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-21 17:57:38,915 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2024-06-21 17:57:38,915 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 176 flow [2024-06-21 17:57:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:38,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:38,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:38,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:57:38,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:38,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash 974479412, now seen corresponding path program 1 times [2024-06-21 17:57:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:38,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048531170] [2024-06-21 17:57:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:39,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:39,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048531170] [2024-06-21 17:57:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048531170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:39,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279355120] [2024-06-21 17:57:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:39,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:39,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:39,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:39,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:39,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:39,507 INFO L124 PetriNetUnfolderBase]: 156/287 cut-off events. [2024-06-21 17:57:39,508 INFO L125 PetriNetUnfolderBase]: For 702/702 co-relation queries the response was YES. [2024-06-21 17:57:39,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 287 events. 156/287 cut-off events. For 702/702 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 964 event pairs, 51 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 989. Up to 264 conditions per place. [2024-06-21 17:57:39,511 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 17:57:39,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 328 flow [2024-06-21 17:57:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 17:57:39,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-21 17:57:39,513 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 176 flow. Second operand 7 states and 73 transitions. [2024-06-21 17:57:39,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 328 flow [2024-06-21 17:57:39,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 314 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:39,516 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 231 flow [2024-06-21 17:57:39,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-21 17:57:39,516 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2024-06-21 17:57:39,517 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 231 flow [2024-06-21 17:57:39,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:39,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:39,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:39,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:57:39,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:39,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -374570946, now seen corresponding path program 2 times [2024-06-21 17:57:39,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:39,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362983214] [2024-06-21 17:57:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362983214] [2024-06-21 17:57:39,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362983214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:39,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:39,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028344340] [2024-06-21 17:57:39,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:39,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:39,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:39,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 231 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:39,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:39,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:39,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:40,142 INFO L124 PetriNetUnfolderBase]: 159/292 cut-off events. [2024-06-21 17:57:40,142 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2024-06-21 17:57:40,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 292 events. 159/292 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 987 event pairs, 50 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1086. Up to 266 conditions per place. [2024-06-21 17:57:40,145 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 35 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2024-06-21 17:57:40,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 366 flow [2024-06-21 17:57:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-06-21 17:57:40,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 17:57:40,147 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 231 flow. Second operand 6 states and 64 transitions. [2024-06-21 17:57:40,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 366 flow [2024-06-21 17:57:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 345 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:40,150 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 265 flow [2024-06-21 17:57:40,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-21 17:57:40,152 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 22 predicate places. [2024-06-21 17:57:40,152 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 265 flow [2024-06-21 17:57:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:40,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:40,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:40,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:57:40,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:40,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1048123148, now seen corresponding path program 3 times [2024-06-21 17:57:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:40,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946325617] [2024-06-21 17:57:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:40,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:40,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:40,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946325617] [2024-06-21 17:57:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946325617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:40,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140735654] [2024-06-21 17:57:40,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:40,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:40,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:40,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:40,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:40,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:40,779 INFO L124 PetriNetUnfolderBase]: 154/285 cut-off events. [2024-06-21 17:57:40,779 INFO L125 PetriNetUnfolderBase]: For 1202/1205 co-relation queries the response was YES. [2024-06-21 17:57:40,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 285 events. 154/285 cut-off events. For 1202/1205 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 964 event pairs, 53 based on Foata normal form. 4/286 useless extension candidates. Maximal degree in co-relation 1081. Up to 239 conditions per place. [2024-06-21 17:57:40,782 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 29 selfloop transitions, 16 changer transitions 0/47 dead transitions. [2024-06-21 17:57:40,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 371 flow [2024-06-21 17:57:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-06-21 17:57:40,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735632183908046 [2024-06-21 17:57:40,783 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 265 flow. Second operand 6 states and 65 transitions. [2024-06-21 17:57:40,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 371 flow [2024-06-21 17:57:40,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 341 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:40,787 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 274 flow [2024-06-21 17:57:40,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-06-21 17:57:40,788 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2024-06-21 17:57:40,788 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 274 flow [2024-06-21 17:57:40,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:40,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:40,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:40,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:57:40,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:40,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:40,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1048115212, now seen corresponding path program 1 times [2024-06-21 17:57:40,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997358245] [2024-06-21 17:57:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:41,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:41,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997358245] [2024-06-21 17:57:41,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997358245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:41,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:41,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:41,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208122804] [2024-06-21 17:57:41,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:41,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:41,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:41,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:41,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:41,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:41,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:41,596 INFO L124 PetriNetUnfolderBase]: 173/318 cut-off events. [2024-06-21 17:57:41,596 INFO L125 PetriNetUnfolderBase]: For 1245/1245 co-relation queries the response was YES. [2024-06-21 17:57:41,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 318 events. 173/318 cut-off events. For 1245/1245 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1108 event pairs, 38 based on Foata normal form. 4/317 useless extension candidates. Maximal degree in co-relation 1174. Up to 192 conditions per place. [2024-06-21 17:57:41,599 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 38 selfloop transitions, 23 changer transitions 0/63 dead transitions. [2024-06-21 17:57:41,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 500 flow [2024-06-21 17:57:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:41,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:41,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-21 17:57:41,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 17:57:41,601 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 274 flow. Second operand 7 states and 84 transitions. [2024-06-21 17:57:41,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 500 flow [2024-06-21 17:57:41,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 455 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:41,605 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 350 flow [2024-06-21 17:57:41,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=350, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-21 17:57:41,605 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-21 17:57:41,605 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 350 flow [2024-06-21 17:57:41,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:41,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:41,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:41,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:57:41,606 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:41,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1858333738, now seen corresponding path program 1 times [2024-06-21 17:57:41,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:41,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845625674] [2024-06-21 17:57:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:42,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:42,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845625674] [2024-06-21 17:57:42,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845625674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:42,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:42,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491299278] [2024-06-21 17:57:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:42,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:42,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:42,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 350 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:42,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:42,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:42,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:42,237 INFO L124 PetriNetUnfolderBase]: 183/334 cut-off events. [2024-06-21 17:57:42,238 INFO L125 PetriNetUnfolderBase]: For 1468/1468 co-relation queries the response was YES. [2024-06-21 17:57:42,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 334 events. 183/334 cut-off events. For 1468/1468 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1180 event pairs, 33 based on Foata normal form. 2/335 useless extension candidates. Maximal degree in co-relation 1385. Up to 281 conditions per place. [2024-06-21 17:57:42,241 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 53 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-21 17:57:42,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 570 flow [2024-06-21 17:57:42,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 17:57:42,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 17:57:42,242 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 350 flow. Second operand 8 states and 86 transitions. [2024-06-21 17:57:42,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 570 flow [2024-06-21 17:57:42,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 546 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:42,247 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 421 flow [2024-06-21 17:57:42,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=421, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-21 17:57:42,247 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-21 17:57:42,247 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 421 flow [2024-06-21 17:57:42,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:42,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:42,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:42,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:57:42,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:42,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1690785042, now seen corresponding path program 2 times [2024-06-21 17:57:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:42,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675174057] [2024-06-21 17:57:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:42,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:42,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:42,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675174057] [2024-06-21 17:57:42,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675174057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:42,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:42,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727519634] [2024-06-21 17:57:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:42,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:42,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:42,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:42,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:42,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:42,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:42,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:42,951 INFO L124 PetriNetUnfolderBase]: 189/344 cut-off events. [2024-06-21 17:57:42,951 INFO L125 PetriNetUnfolderBase]: For 1876/1876 co-relation queries the response was YES. [2024-06-21 17:57:42,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 344 events. 189/344 cut-off events. For 1876/1876 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1218 event pairs, 32 based on Foata normal form. 2/345 useless extension candidates. Maximal degree in co-relation 1571. Up to 285 conditions per place. [2024-06-21 17:57:42,954 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 52 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-06-21 17:57:42,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 72 transitions, 625 flow [2024-06-21 17:57:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 17:57:42,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 17:57:42,955 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 421 flow. Second operand 7 states and 77 transitions. [2024-06-21 17:57:42,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 72 transitions, 625 flow [2024-06-21 17:57:42,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 603 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:42,960 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 467 flow [2024-06-21 17:57:42,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-21 17:57:42,961 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-06-21 17:57:42,961 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 467 flow [2024-06-21 17:57:42,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:42,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:42,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:42,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:57:42,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:42,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:42,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1273202994, now seen corresponding path program 3 times [2024-06-21 17:57:42,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:42,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240762867] [2024-06-21 17:57:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:43,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:43,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240762867] [2024-06-21 17:57:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240762867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:43,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:43,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573415566] [2024-06-21 17:57:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:43,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:43,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:43,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:43,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:43,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:43,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:43,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:43,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:43,583 INFO L124 PetriNetUnfolderBase]: 200/362 cut-off events. [2024-06-21 17:57:43,583 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-21 17:57:43,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 362 events. 200/362 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1300 event pairs, 32 based on Foata normal form. 2/363 useless extension candidates. Maximal degree in co-relation 1758. Up to 285 conditions per place. [2024-06-21 17:57:43,586 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 52 selfloop transitions, 22 changer transitions 0/76 dead transitions. [2024-06-21 17:57:43,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 731 flow [2024-06-21 17:57:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:43,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:43,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 17:57:43,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3842364532019704 [2024-06-21 17:57:43,588 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 467 flow. Second operand 7 states and 78 transitions. [2024-06-21 17:57:43,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 731 flow [2024-06-21 17:57:43,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 679 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:43,594 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 519 flow [2024-06-21 17:57:43,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=519, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2024-06-21 17:57:43,595 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 41 predicate places. [2024-06-21 17:57:43,595 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 519 flow [2024-06-21 17:57:43,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:43,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:43,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:43,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:57:43,596 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:43,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1277844624, now seen corresponding path program 4 times [2024-06-21 17:57:43,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:43,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791824640] [2024-06-21 17:57:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:43,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:44,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:44,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791824640] [2024-06-21 17:57:44,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791824640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:44,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:44,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543216364] [2024-06-21 17:57:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:44,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:44,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:44,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 519 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:44,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:44,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:44,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:44,251 INFO L124 PetriNetUnfolderBase]: 210/383 cut-off events. [2024-06-21 17:57:44,251 INFO L125 PetriNetUnfolderBase]: For 2673/2673 co-relation queries the response was YES. [2024-06-21 17:57:44,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 383 events. 210/383 cut-off events. For 2673/2673 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1415 event pairs, 39 based on Foata normal form. 6/383 useless extension candidates. Maximal degree in co-relation 1771. Up to 193 conditions per place. [2024-06-21 17:57:44,255 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 49 selfloop transitions, 31 changer transitions 0/82 dead transitions. [2024-06-21 17:57:44,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 803 flow [2024-06-21 17:57:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-21 17:57:44,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-06-21 17:57:44,257 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 519 flow. Second operand 7 states and 86 transitions. [2024-06-21 17:57:44,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 803 flow [2024-06-21 17:57:44,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 781 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:44,265 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 621 flow [2024-06-21 17:57:44,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=621, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-06-21 17:57:44,266 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 17:57:44,266 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 621 flow [2024-06-21 17:57:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:44,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:44,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:44,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:57:44,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:44,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1868167476, now seen corresponding path program 1 times [2024-06-21 17:57:44,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:44,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30057281] [2024-06-21 17:57:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:44,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:44,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30057281] [2024-06-21 17:57:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30057281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:44,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894482989] [2024-06-21 17:57:44,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:44,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:45,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:45,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:45,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:45,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:45,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:45,214 INFO L124 PetriNetUnfolderBase]: 230/435 cut-off events. [2024-06-21 17:57:45,214 INFO L125 PetriNetUnfolderBase]: For 3516/3516 co-relation queries the response was YES. [2024-06-21 17:57:45,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 435 events. 230/435 cut-off events. For 3516/3516 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1712 event pairs, 42 based on Foata normal form. 14/443 useless extension candidates. Maximal degree in co-relation 2065. Up to 209 conditions per place. [2024-06-21 17:57:45,218 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 52 selfloop transitions, 35 changer transitions 0/89 dead transitions. [2024-06-21 17:57:45,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 89 transitions, 921 flow [2024-06-21 17:57:45,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 17:57:45,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 17:57:45,220 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 621 flow. Second operand 8 states and 96 transitions. [2024-06-21 17:57:45,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 89 transitions, 921 flow [2024-06-21 17:57:45,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 878 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:45,228 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 666 flow [2024-06-21 17:57:45,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=666, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-06-21 17:57:45,230 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-21 17:57:45,230 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 666 flow [2024-06-21 17:57:45,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:45,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:45,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:45,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:57:45,231 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:45,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1379521269, now seen corresponding path program 1 times [2024-06-21 17:57:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:45,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916235804] [2024-06-21 17:57:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916235804] [2024-06-21 17:57:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916235804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:45,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:45,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:45,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844480898] [2024-06-21 17:57:45,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:45,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:45,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:45,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:45,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:45,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 17:57:45,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 666 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:45,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:45,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 17:57:45,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:45,903 INFO L124 PetriNetUnfolderBase]: 236/451 cut-off events. [2024-06-21 17:57:45,903 INFO L125 PetriNetUnfolderBase]: For 3153/3158 co-relation queries the response was YES. [2024-06-21 17:57:45,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2280 conditions, 451 events. 236/451 cut-off events. For 3153/3158 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1873 event pairs, 42 based on Foata normal form. 6/453 useless extension candidates. Maximal degree in co-relation 2242. Up to 361 conditions per place. [2024-06-21 17:57:45,907 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 54 selfloop transitions, 27 changer transitions 0/93 dead transitions. [2024-06-21 17:57:45,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 93 transitions, 985 flow [2024-06-21 17:57:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 17:57:45,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-06-21 17:57:45,909 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 666 flow. Second operand 7 states and 82 transitions. [2024-06-21 17:57:45,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 93 transitions, 985 flow [2024-06-21 17:57:45,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 93 transitions, 889 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:45,918 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 796 flow [2024-06-21 17:57:45,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=796, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-06-21 17:57:45,919 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-21 17:57:45,919 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 796 flow [2024-06-21 17:57:45,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:45,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:45,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:45,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:57:45,920 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:45,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2022830747, now seen corresponding path program 2 times [2024-06-21 17:57:45,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:45,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226359846] [2024-06-21 17:57:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:45,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:46,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226359846] [2024-06-21 17:57:46,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226359846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:46,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:46,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033200154] [2024-06-21 17:57:46,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:46,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:46,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:46,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 796 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:46,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:46,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:46,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:46,938 INFO L124 PetriNetUnfolderBase]: 251/469 cut-off events. [2024-06-21 17:57:46,939 INFO L125 PetriNetUnfolderBase]: For 3274/3274 co-relation queries the response was YES. [2024-06-21 17:57:46,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 469 events. 251/469 cut-off events. For 3274/3274 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1920 event pairs, 43 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 2343. Up to 390 conditions per place. [2024-06-21 17:57:46,943 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 67 selfloop transitions, 25 changer transitions 0/94 dead transitions. [2024-06-21 17:57:46,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 1020 flow [2024-06-21 17:57:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-21 17:57:46,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 17:57:46,945 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 796 flow. Second operand 7 states and 77 transitions. [2024-06-21 17:57:46,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 1020 flow [2024-06-21 17:57:46,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 94 transitions, 983 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:46,955 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 828 flow [2024-06-21 17:57:46,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=828, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2024-06-21 17:57:46,955 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-21 17:57:46,956 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 828 flow [2024-06-21 17:57:46,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:46,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:46,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:46,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:57:46,956 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:46,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:46,957 INFO L85 PathProgramCache]: Analyzing trace with hash 871154448, now seen corresponding path program 1 times [2024-06-21 17:57:46,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:46,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098357414] [2024-06-21 17:57:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:46,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:47,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:47,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098357414] [2024-06-21 17:57:47,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098357414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:47,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:47,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:47,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503228949] [2024-06-21 17:57:47,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:47,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:47,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:47,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:47,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 828 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:47,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:47,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:47,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:47,646 INFO L124 PetriNetUnfolderBase]: 257/481 cut-off events. [2024-06-21 17:57:47,647 INFO L125 PetriNetUnfolderBase]: For 4019/4025 co-relation queries the response was YES. [2024-06-21 17:57:47,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 481 events. 257/481 cut-off events. For 4019/4025 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1986 event pairs, 49 based on Foata normal form. 6/482 useless extension candidates. Maximal degree in co-relation 2438. Up to 390 conditions per place. [2024-06-21 17:57:47,651 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 68 selfloop transitions, 24 changer transitions 1/95 dead transitions. [2024-06-21 17:57:47,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 1067 flow [2024-06-21 17:57:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-21 17:57:47,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2024-06-21 17:57:47,653 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 828 flow. Second operand 7 states and 76 transitions. [2024-06-21 17:57:47,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 1067 flow [2024-06-21 17:57:47,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 993 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:47,664 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 820 flow [2024-06-21 17:57:47,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=820, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2024-06-21 17:57:47,664 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-21 17:57:47,664 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 820 flow [2024-06-21 17:57:47,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:47,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:47,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:47,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:57:47,665 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:47,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1721005248, now seen corresponding path program 2 times [2024-06-21 17:57:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407611615] [2024-06-21 17:57:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:47,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:48,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:48,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407611615] [2024-06-21 17:57:48,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407611615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:48,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:48,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907275266] [2024-06-21 17:57:48,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:48,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:48,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:48,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 820 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:48,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:48,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:48,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:48,337 INFO L124 PetriNetUnfolderBase]: 264/495 cut-off events. [2024-06-21 17:57:48,337 INFO L125 PetriNetUnfolderBase]: For 4342/4345 co-relation queries the response was YES. [2024-06-21 17:57:48,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 495 events. 264/495 cut-off events. For 4342/4345 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2065 event pairs, 53 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2503. Up to 260 conditions per place. [2024-06-21 17:57:48,341 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 53 selfloop transitions, 43 changer transitions 1/99 dead transitions. [2024-06-21 17:57:48,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 99 transitions, 1154 flow [2024-06-21 17:57:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:48,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-21 17:57:48,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088669950738916 [2024-06-21 17:57:48,345 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 820 flow. Second operand 7 states and 83 transitions. [2024-06-21 17:57:48,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 99 transitions, 1154 flow [2024-06-21 17:57:48,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 99 transitions, 1108 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:48,358 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 918 flow [2024-06-21 17:57:48,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=918, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2024-06-21 17:57:48,359 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-21 17:57:48,359 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 918 flow [2024-06-21 17:57:48,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:48,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:48,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:48,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:57:48,360 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:48,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:48,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1720999668, now seen corresponding path program 3 times [2024-06-21 17:57:48,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:48,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153403235] [2024-06-21 17:57:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:48,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:48,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:48,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153403235] [2024-06-21 17:57:48,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153403235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:48,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:48,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:48,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139759076] [2024-06-21 17:57:48,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:48,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:48,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:48,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:48,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 918 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:48,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:48,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:48,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:49,003 INFO L124 PetriNetUnfolderBase]: 250/474 cut-off events. [2024-06-21 17:57:49,003 INFO L125 PetriNetUnfolderBase]: For 4662/4665 co-relation queries the response was YES. [2024-06-21 17:57:49,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 474 events. 250/474 cut-off events. For 4662/4665 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1973 event pairs, 51 based on Foata normal form. 4/472 useless extension candidates. Maximal degree in co-relation 2503. Up to 252 conditions per place. [2024-06-21 17:57:49,008 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 48 changer transitions 1/98 dead transitions. [2024-06-21 17:57:49,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 1216 flow [2024-06-21 17:57:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-21 17:57:49,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187192118226601 [2024-06-21 17:57:49,009 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 918 flow. Second operand 7 states and 85 transitions. [2024-06-21 17:57:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 1216 flow [2024-06-21 17:57:49,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 98 transitions, 1164 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:49,022 INFO L231 Difference]: Finished difference. Result has 93 places, 85 transitions, 961 flow [2024-06-21 17:57:49,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=961, PETRI_PLACES=93, PETRI_TRANSITIONS=85} [2024-06-21 17:57:49,022 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-06-21 17:57:49,022 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 85 transitions, 961 flow [2024-06-21 17:57:49,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:49,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:49,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:49,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:57:49,023 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:49,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2078340789, now seen corresponding path program 1 times [2024-06-21 17:57:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473030284] [2024-06-21 17:57:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:49,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473030284] [2024-06-21 17:57:49,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473030284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:49,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:49,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:49,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888309406] [2024-06-21 17:57:49,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:49,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:49,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:49,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:49,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:49,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:49,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 85 transitions, 961 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:49,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:49,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:49,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:49,898 INFO L124 PetriNetUnfolderBase]: 242/461 cut-off events. [2024-06-21 17:57:49,898 INFO L125 PetriNetUnfolderBase]: For 4844/4850 co-relation queries the response was YES. [2024-06-21 17:57:49,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 461 events. 242/461 cut-off events. For 4844/4850 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1921 event pairs, 51 based on Foata normal form. 5/463 useless extension candidates. Maximal degree in co-relation 2530. Up to 410 conditions per place. [2024-06-21 17:57:49,903 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 74 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-21 17:57:49,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 1190 flow [2024-06-21 17:57:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 17:57:49,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-21 17:57:49,904 INFO L175 Difference]: Start difference. First operand has 93 places, 85 transitions, 961 flow. Second operand 7 states and 73 transitions. [2024-06-21 17:57:49,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 1190 flow [2024-06-21 17:57:49,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 1071 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:49,919 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 912 flow [2024-06-21 17:57:49,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-06-21 17:57:49,919 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-21 17:57:49,919 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 912 flow [2024-06-21 17:57:49,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:49,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:49,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:57:49,920 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:49,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2078607699, now seen corresponding path program 2 times [2024-06-21 17:57:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44167752] [2024-06-21 17:57:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:50,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:50,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44167752] [2024-06-21 17:57:50,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44167752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:50,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:50,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:50,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608574678] [2024-06-21 17:57:50,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:50,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:50,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:50,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:50,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:50,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 912 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:50,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:50,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:50,717 INFO L124 PetriNetUnfolderBase]: 238/455 cut-off events. [2024-06-21 17:57:50,717 INFO L125 PetriNetUnfolderBase]: For 4536/4539 co-relation queries the response was YES. [2024-06-21 17:57:50,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 455 events. 238/455 cut-off events. For 4536/4539 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1867 event pairs, 53 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 2420. Up to 254 conditions per place. [2024-06-21 17:57:50,721 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 59 selfloop transitions, 38 changer transitions 0/99 dead transitions. [2024-06-21 17:57:50,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 99 transitions, 1224 flow [2024-06-21 17:57:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 17:57:50,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2024-06-21 17:57:50,723 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 912 flow. Second operand 7 states and 81 transitions. [2024-06-21 17:57:50,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 99 transitions, 1224 flow [2024-06-21 17:57:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 1183 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:50,737 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 962 flow [2024-06-21 17:57:50,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=962, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-06-21 17:57:50,737 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-21 17:57:50,738 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 962 flow [2024-06-21 17:57:50,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:50,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:50,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:57:50,738 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:50,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash 318977517, now seen corresponding path program 1 times [2024-06-21 17:57:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:50,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482033086] [2024-06-21 17:57:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:50,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:51,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:51,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482033086] [2024-06-21 17:57:51,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482033086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:51,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:51,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:51,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789516452] [2024-06-21 17:57:51,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:51,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:51,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:51,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:51,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 962 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:51,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:51,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:51,754 INFO L124 PetriNetUnfolderBase]: 242/461 cut-off events. [2024-06-21 17:57:51,754 INFO L125 PetriNetUnfolderBase]: For 5141/5141 co-relation queries the response was YES. [2024-06-21 17:57:51,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2561 conditions, 461 events. 242/461 cut-off events. For 5141/5141 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1894 event pairs, 32 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 2514. Up to 377 conditions per place. [2024-06-21 17:57:51,759 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 84 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2024-06-21 17:57:51,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 103 transitions, 1208 flow [2024-06-21 17:57:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 83 transitions. [2024-06-21 17:57:51,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577586206896552 [2024-06-21 17:57:51,760 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 962 flow. Second operand 8 states and 83 transitions. [2024-06-21 17:57:51,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 103 transitions, 1208 flow [2024-06-21 17:57:51,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 1135 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:51,778 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 935 flow [2024-06-21 17:57:51,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2024-06-21 17:57:51,778 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-06-21 17:57:51,779 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 935 flow [2024-06-21 17:57:51,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:51,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:51,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:51,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:57:51,779 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:51,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1235864481, now seen corresponding path program 2 times [2024-06-21 17:57:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:51,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857584422] [2024-06-21 17:57:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:51,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:52,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:52,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857584422] [2024-06-21 17:57:52,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857584422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:52,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:52,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:52,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125026935] [2024-06-21 17:57:52,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:52,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:52,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:52,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:52,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:52,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:52,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 935 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:52,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:52,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:52,877 INFO L124 PetriNetUnfolderBase]: 246/469 cut-off events. [2024-06-21 17:57:52,877 INFO L125 PetriNetUnfolderBase]: For 5390/5390 co-relation queries the response was YES. [2024-06-21 17:57:52,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 469 events. 246/469 cut-off events. For 5390/5390 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1962 event pairs, 41 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2524. Up to 376 conditions per place. [2024-06-21 17:57:52,881 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 76 selfloop transitions, 26 changer transitions 0/104 dead transitions. [2024-06-21 17:57:52,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 104 transitions, 1189 flow [2024-06-21 17:57:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 17:57:52,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 17:57:52,882 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 935 flow. Second operand 8 states and 85 transitions. [2024-06-21 17:57:52,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 104 transitions, 1189 flow [2024-06-21 17:57:52,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 104 transitions, 1153 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:52,897 INFO L231 Difference]: Finished difference. Result has 102 places, 90 transitions, 969 flow [2024-06-21 17:57:52,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=102, PETRI_TRANSITIONS=90} [2024-06-21 17:57:52,898 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 74 predicate places. [2024-06-21 17:57:52,898 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 90 transitions, 969 flow [2024-06-21 17:57:52,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:52,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:52,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:52,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:57:52,898 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:52,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1346687125, now seen corresponding path program 1 times [2024-06-21 17:57:52,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:52,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716593202] [2024-06-21 17:57:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:52,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716593202] [2024-06-21 17:57:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716593202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:53,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830833115] [2024-06-21 17:57:53,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:53,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:53,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:53,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 90 transitions, 969 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:53,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:53,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:53,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:53,781 INFO L124 PetriNetUnfolderBase]: 241/455 cut-off events. [2024-06-21 17:57:53,782 INFO L125 PetriNetUnfolderBase]: For 5643/5649 co-relation queries the response was YES. [2024-06-21 17:57:53,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 455 events. 241/455 cut-off events. For 5643/5649 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1888 event pairs, 42 based on Foata normal form. 5/457 useless extension candidates. Maximal degree in co-relation 2493. Up to 354 conditions per place. [2024-06-21 17:57:53,787 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 71 selfloop transitions, 26 changer transitions 2/101 dead transitions. [2024-06-21 17:57:53,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 101 transitions, 1205 flow [2024-06-21 17:57:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-06-21 17:57:53,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37438423645320196 [2024-06-21 17:57:53,789 INFO L175 Difference]: Start difference. First operand has 102 places, 90 transitions, 969 flow. Second operand 7 states and 76 transitions. [2024-06-21 17:57:53,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 101 transitions, 1205 flow [2024-06-21 17:57:53,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 101 transitions, 1151 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:53,807 INFO L231 Difference]: Finished difference. Result has 103 places, 88 transitions, 951 flow [2024-06-21 17:57:53,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=951, PETRI_PLACES=103, PETRI_TRANSITIONS=88} [2024-06-21 17:57:53,808 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2024-06-21 17:57:53,808 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 88 transitions, 951 flow [2024-06-21 17:57:53,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:53,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:53,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:53,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:57:53,809 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:53,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:53,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1811559447, now seen corresponding path program 3 times [2024-06-21 17:57:53,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:53,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959951513] [2024-06-21 17:57:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:53,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:54,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:54,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959951513] [2024-06-21 17:57:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959951513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:54,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:54,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102708919] [2024-06-21 17:57:54,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:54,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:54,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:54,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:54,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 88 transitions, 951 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:54,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:54,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:54,736 INFO L124 PetriNetUnfolderBase]: 228/427 cut-off events. [2024-06-21 17:57:54,737 INFO L125 PetriNetUnfolderBase]: For 6231/6231 co-relation queries the response was YES. [2024-06-21 17:57:54,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 427 events. 228/427 cut-off events. For 6231/6231 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1724 event pairs, 35 based on Foata normal form. 2/428 useless extension candidates. Maximal degree in co-relation 2419. Up to 322 conditions per place. [2024-06-21 17:57:54,741 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 68 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-06-21 17:57:54,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 102 transitions, 1203 flow [2024-06-21 17:57:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2024-06-21 17:57:54,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36637931034482757 [2024-06-21 17:57:54,743 INFO L175 Difference]: Start difference. First operand has 103 places, 88 transitions, 951 flow. Second operand 8 states and 85 transitions. [2024-06-21 17:57:54,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 102 transitions, 1203 flow [2024-06-21 17:57:54,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 1085 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:54,760 INFO L231 Difference]: Finished difference. Result has 103 places, 89 transitions, 914 flow [2024-06-21 17:57:54,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=914, PETRI_PLACES=103, PETRI_TRANSITIONS=89} [2024-06-21 17:57:54,761 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 75 predicate places. [2024-06-21 17:57:54,761 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 89 transitions, 914 flow [2024-06-21 17:57:54,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:54,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:54,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:54,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:57:54,762 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:54,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:54,762 INFO L85 PathProgramCache]: Analyzing trace with hash 125584903, now seen corresponding path program 1 times [2024-06-21 17:57:54,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:54,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715598988] [2024-06-21 17:57:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:54,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:55,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:55,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715598988] [2024-06-21 17:57:55,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715598988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:55,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:55,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22546084] [2024-06-21 17:57:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:55,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:55,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:55,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 89 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:55,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:55,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:55,527 INFO L124 PetriNetUnfolderBase]: 224/423 cut-off events. [2024-06-21 17:57:55,527 INFO L125 PetriNetUnfolderBase]: For 5856/5859 co-relation queries the response was YES. [2024-06-21 17:57:55,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2342 conditions, 423 events. 224/423 cut-off events. For 5856/5859 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1694 event pairs, 45 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 2292. Up to 239 conditions per place. [2024-06-21 17:57:55,532 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 62 selfloop transitions, 35 changer transitions 0/99 dead transitions. [2024-06-21 17:57:55,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 99 transitions, 1146 flow [2024-06-21 17:57:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 17:57:55,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2024-06-21 17:57:55,533 INFO L175 Difference]: Start difference. First operand has 103 places, 89 transitions, 914 flow. Second operand 7 states and 81 transitions. [2024-06-21 17:57:55,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 99 transitions, 1146 flow [2024-06-21 17:57:55,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 99 transitions, 1073 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:55,550 INFO L231 Difference]: Finished difference. Result has 104 places, 89 transitions, 919 flow [2024-06-21 17:57:55,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=104, PETRI_TRANSITIONS=89} [2024-06-21 17:57:55,550 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 76 predicate places. [2024-06-21 17:57:55,551 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 89 transitions, 919 flow [2024-06-21 17:57:55,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:55,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:55,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:55,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:57:55,551 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:55,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:55,552 INFO L85 PathProgramCache]: Analyzing trace with hash 12329909, now seen corresponding path program 1 times [2024-06-21 17:57:55,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:55,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764362826] [2024-06-21 17:57:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:56,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:56,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764362826] [2024-06-21 17:57:56,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764362826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:56,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:56,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:56,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714204976] [2024-06-21 17:57:56,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:56,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:56,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:56,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:56,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:56,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 89 transitions, 919 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:56,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:56,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:56,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:56,500 INFO L124 PetriNetUnfolderBase]: 228/430 cut-off events. [2024-06-21 17:57:56,500 INFO L125 PetriNetUnfolderBase]: For 6272/6278 co-relation queries the response was YES. [2024-06-21 17:57:56,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 430 events. 228/430 cut-off events. For 6272/6278 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1758 event pairs, 44 based on Foata normal form. 6/433 useless extension candidates. Maximal degree in co-relation 2336. Up to 362 conditions per place. [2024-06-21 17:57:56,505 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 74 selfloop transitions, 24 changer transitions 0/100 dead transitions. [2024-06-21 17:57:56,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 100 transitions, 1153 flow [2024-06-21 17:57:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-21 17:57:56,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 17:57:56,506 INFO L175 Difference]: Start difference. First operand has 104 places, 89 transitions, 919 flow. Second operand 9 states and 90 transitions. [2024-06-21 17:57:56,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 100 transitions, 1153 flow [2024-06-21 17:57:56,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 100 transitions, 1039 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:56,524 INFO L231 Difference]: Finished difference. Result has 106 places, 90 transitions, 872 flow [2024-06-21 17:57:56,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=872, PETRI_PLACES=106, PETRI_TRANSITIONS=90} [2024-06-21 17:57:56,525 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 78 predicate places. [2024-06-21 17:57:56,525 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 90 transitions, 872 flow [2024-06-21 17:57:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:56,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:57:56,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:56,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:56,526 INFO L85 PathProgramCache]: Analyzing trace with hash -345268327, now seen corresponding path program 2 times [2024-06-21 17:57:56,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:56,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514555447] [2024-06-21 17:57:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:57,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:57,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514555447] [2024-06-21 17:57:57,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514555447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:57,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:57,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972589967] [2024-06-21 17:57:57,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:57,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:57,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:57,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:57,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 90 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:57,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:57,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:57,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:57,369 INFO L124 PetriNetUnfolderBase]: 225/425 cut-off events. [2024-06-21 17:57:57,369 INFO L125 PetriNetUnfolderBase]: For 5419/5425 co-relation queries the response was YES. [2024-06-21 17:57:57,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 425 events. 225/425 cut-off events. For 5419/5425 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1719 event pairs, 35 based on Foata normal form. 6/428 useless extension candidates. Maximal degree in co-relation 2224. Up to 337 conditions per place. [2024-06-21 17:57:57,373 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 75 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-21 17:57:57,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 100 transitions, 1094 flow [2024-06-21 17:57:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-21 17:57:57,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 17:57:57,375 INFO L175 Difference]: Start difference. First operand has 106 places, 90 transitions, 872 flow. Second operand 8 states and 80 transitions. [2024-06-21 17:57:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 100 transitions, 1094 flow [2024-06-21 17:57:57,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 100 transitions, 1039 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:57,392 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 867 flow [2024-06-21 17:57:57,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=867, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2024-06-21 17:57:57,392 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2024-06-21 17:57:57,392 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 867 flow [2024-06-21 17:57:57,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:57,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:57,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:57:57,393 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:57,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash -351948145, now seen corresponding path program 4 times [2024-06-21 17:57:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510778342] [2024-06-21 17:57:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:58,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510778342] [2024-06-21 17:57:58,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510778342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:58,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:58,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:58,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978053000] [2024-06-21 17:57:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:58,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:58,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:58,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 867 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:58,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:58,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:58,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:58,390 INFO L124 PetriNetUnfolderBase]: 242/465 cut-off events. [2024-06-21 17:57:58,390 INFO L125 PetriNetUnfolderBase]: For 8762/8765 co-relation queries the response was YES. [2024-06-21 17:57:58,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 465 events. 242/465 cut-off events. For 8762/8765 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1942 event pairs, 49 based on Foata normal form. 14/473 useless extension candidates. Maximal degree in co-relation 2287. Up to 204 conditions per place. [2024-06-21 17:57:58,394 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 40 changer transitions 8/107 dead transitions. [2024-06-21 17:57:58,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 107 transitions, 1147 flow [2024-06-21 17:57:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 17:57:58,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-21 17:57:58,395 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 867 flow. Second operand 8 states and 97 transitions. [2024-06-21 17:57:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 107 transitions, 1147 flow [2024-06-21 17:57:58,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 107 transitions, 1079 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:58,416 INFO L231 Difference]: Finished difference. Result has 108 places, 87 transitions, 866 flow [2024-06-21 17:57:58,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=866, PETRI_PLACES=108, PETRI_TRANSITIONS=87} [2024-06-21 17:57:58,417 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 80 predicate places. [2024-06-21 17:57:58,417 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 87 transitions, 866 flow [2024-06-21 17:57:58,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:58,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:58,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:58,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:57:58,417 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:58,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1298369053, now seen corresponding path program 1 times [2024-06-21 17:57:58,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:58,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132216669] [2024-06-21 17:57:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:58,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132216669] [2024-06-21 17:57:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132216669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:59,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:59,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:59,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686865004] [2024-06-21 17:57:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:59,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:59,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:59,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:59,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:59,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:59,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 87 transitions, 866 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:59,423 INFO L124 PetriNetUnfolderBase]: 220/422 cut-off events. [2024-06-21 17:57:59,424 INFO L125 PetriNetUnfolderBase]: For 5610/5616 co-relation queries the response was YES. [2024-06-21 17:57:59,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2235 conditions, 422 events. 220/422 cut-off events. For 5610/5616 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1739 event pairs, 27 based on Foata normal form. 6/425 useless extension candidates. Maximal degree in co-relation 2182. Up to 329 conditions per place. [2024-06-21 17:57:59,427 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 82 selfloop transitions, 17 changer transitions 0/101 dead transitions. [2024-06-21 17:57:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 101 transitions, 1106 flow [2024-06-21 17:57:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-21 17:57:59,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-21 17:57:59,429 INFO L175 Difference]: Start difference. First operand has 108 places, 87 transitions, 866 flow. Second operand 8 states and 81 transitions. [2024-06-21 17:57:59,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 101 transitions, 1106 flow [2024-06-21 17:57:59,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 101 transitions, 964 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 17:57:59,445 INFO L231 Difference]: Finished difference. Result has 107 places, 88 transitions, 772 flow [2024-06-21 17:57:59,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=772, PETRI_PLACES=107, PETRI_TRANSITIONS=88} [2024-06-21 17:57:59,446 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 79 predicate places. [2024-06-21 17:57:59,446 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 88 transitions, 772 flow [2024-06-21 17:57:59,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:59,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:59,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:57:59,446 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:59,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 310481825, now seen corresponding path program 2 times [2024-06-21 17:57:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:59,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205103477] [2024-06-21 17:57:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:59,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:00,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:00,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205103477] [2024-06-21 17:58:00,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205103477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:00,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:00,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632986634] [2024-06-21 17:58:00,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:00,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:00,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:00,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 88 transitions, 772 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:00,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:00,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:00,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:00,399 INFO L124 PetriNetUnfolderBase]: 245/471 cut-off events. [2024-06-21 17:58:00,400 INFO L125 PetriNetUnfolderBase]: For 6303/6303 co-relation queries the response was YES. [2024-06-21 17:58:00,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2335 conditions, 471 events. 245/471 cut-off events. For 6303/6303 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2043 event pairs, 45 based on Foata normal form. 2/469 useless extension candidates. Maximal degree in co-relation 2283. Up to 355 conditions per place. [2024-06-21 17:58:00,403 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 83 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-21 17:58:00,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 114 transitions, 1213 flow [2024-06-21 17:58:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 17:58:00,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-21 17:58:00,405 INFO L175 Difference]: Start difference. First operand has 107 places, 88 transitions, 772 flow. Second operand 9 states and 94 transitions. [2024-06-21 17:58:00,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 114 transitions, 1213 flow [2024-06-21 17:58:00,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 114 transitions, 1169 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:00,424 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 944 flow [2024-06-21 17:58:00,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=944, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2024-06-21 17:58:00,424 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 86 predicate places. [2024-06-21 17:58:00,424 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 944 flow [2024-06-21 17:58:00,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:00,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:00,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:00,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:58:00,425 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:00,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:00,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1424935303, now seen corresponding path program 3 times [2024-06-21 17:58:00,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:00,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79367396] [2024-06-21 17:58:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:00,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:01,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:01,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79367396] [2024-06-21 17:58:01,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79367396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:01,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:01,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:01,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433086559] [2024-06-21 17:58:01,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:01,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:01,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:01,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:01,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:01,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:01,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 944 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:01,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:01,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:01,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:01,336 INFO L124 PetriNetUnfolderBase]: 249/481 cut-off events. [2024-06-21 17:58:01,336 INFO L125 PetriNetUnfolderBase]: For 7069/7069 co-relation queries the response was YES. [2024-06-21 17:58:01,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 481 events. 249/481 cut-off events. For 7069/7069 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2118 event pairs, 43 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2415. Up to 389 conditions per place. [2024-06-21 17:58:01,341 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 84 selfloop transitions, 29 changer transitions 0/115 dead transitions. [2024-06-21 17:58:01,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 115 transitions, 1233 flow [2024-06-21 17:58:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 93 transitions. [2024-06-21 17:58:01,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 17:58:01,343 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 944 flow. Second operand 9 states and 93 transitions. [2024-06-21 17:58:01,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 115 transitions, 1233 flow [2024-06-21 17:58:01,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 115 transitions, 1223 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:01,366 INFO L231 Difference]: Finished difference. Result has 123 places, 101 transitions, 1031 flow [2024-06-21 17:58:01,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1031, PETRI_PLACES=123, PETRI_TRANSITIONS=101} [2024-06-21 17:58:01,366 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 95 predicate places. [2024-06-21 17:58:01,366 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 101 transitions, 1031 flow [2024-06-21 17:58:01,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:01,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:01,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:01,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:58:01,367 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:01,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:01,367 INFO L85 PathProgramCache]: Analyzing trace with hash 138308439, now seen corresponding path program 4 times [2024-06-21 17:58:01,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:01,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516305618] [2024-06-21 17:58:01,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:01,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:02,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:02,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516305618] [2024-06-21 17:58:02,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516305618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:02,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:02,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:02,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601825962] [2024-06-21 17:58:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:02,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:02,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:02,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:02,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 101 transitions, 1031 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:02,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:02,307 INFO L124 PetriNetUnfolderBase]: 246/474 cut-off events. [2024-06-21 17:58:02,308 INFO L125 PetriNetUnfolderBase]: For 6850/6850 co-relation queries the response was YES. [2024-06-21 17:58:02,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 474 events. 246/474 cut-off events. For 6850/6850 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2061 event pairs, 46 based on Foata normal form. 2/472 useless extension candidates. Maximal degree in co-relation 2422. Up to 379 conditions per place. [2024-06-21 17:58:02,311 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 82 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-06-21 17:58:02,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 114 transitions, 1306 flow [2024-06-21 17:58:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-21 17:58:02,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-06-21 17:58:02,313 INFO L175 Difference]: Start difference. First operand has 123 places, 101 transitions, 1031 flow. Second operand 9 states and 92 transitions. [2024-06-21 17:58:02,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 114 transitions, 1306 flow [2024-06-21 17:58:02,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 114 transitions, 1235 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:02,334 INFO L231 Difference]: Finished difference. Result has 126 places, 101 transitions, 1026 flow [2024-06-21 17:58:02,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1026, PETRI_PLACES=126, PETRI_TRANSITIONS=101} [2024-06-21 17:58:02,334 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2024-06-21 17:58:02,335 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 101 transitions, 1026 flow [2024-06-21 17:58:02,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:02,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:58:02,335 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:02,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1424939023, now seen corresponding path program 5 times [2024-06-21 17:58:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062384793] [2024-06-21 17:58:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:02,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062384793] [2024-06-21 17:58:02,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062384793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:02,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:02,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681155396] [2024-06-21 17:58:02,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:02,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:02,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 101 transitions, 1026 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:02,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:02,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:02,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:03,133 INFO L124 PetriNetUnfolderBase]: 250/484 cut-off events. [2024-06-21 17:58:03,133 INFO L125 PetriNetUnfolderBase]: For 7382/7382 co-relation queries the response was YES. [2024-06-21 17:58:03,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2509 conditions, 484 events. 250/484 cut-off events. For 7382/7382 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2143 event pairs, 43 based on Foata normal form. 2/483 useless extension candidates. Maximal degree in co-relation 2449. Up to 374 conditions per place. [2024-06-21 17:58:03,137 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 86 selfloop transitions, 28 changer transitions 0/116 dead transitions. [2024-06-21 17:58:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 116 transitions, 1304 flow [2024-06-21 17:58:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 17:58:03,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36015325670498083 [2024-06-21 17:58:03,138 INFO L175 Difference]: Start difference. First operand has 126 places, 101 transitions, 1026 flow. Second operand 9 states and 94 transitions. [2024-06-21 17:58:03,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 116 transitions, 1304 flow [2024-06-21 17:58:03,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 116 transitions, 1207 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:58:03,156 INFO L231 Difference]: Finished difference. Result has 125 places, 102 transitions, 1003 flow [2024-06-21 17:58:03,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1003, PETRI_PLACES=125, PETRI_TRANSITIONS=102} [2024-06-21 17:58:03,156 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 97 predicate places. [2024-06-21 17:58:03,157 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 102 transitions, 1003 flow [2024-06-21 17:58:03,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:03,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:03,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:03,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:58:03,157 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:03,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -490219045, now seen corresponding path program 1 times [2024-06-21 17:58:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:03,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58415896] [2024-06-21 17:58:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:03,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:03,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:03,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58415896] [2024-06-21 17:58:03,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58415896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:03,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:03,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:03,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068404075] [2024-06-21 17:58:03,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:03,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:03,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:03,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:03,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:03,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 102 transitions, 1003 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:03,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:03,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:03,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:03,824 INFO L124 PetriNetUnfolderBase]: 298/583 cut-off events. [2024-06-21 17:58:03,824 INFO L125 PetriNetUnfolderBase]: For 15828/15828 co-relation queries the response was YES. [2024-06-21 17:58:03,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3141 conditions, 583 events. 298/583 cut-off events. For 15828/15828 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2703 event pairs, 63 based on Foata normal form. 8/586 useless extension candidates. Maximal degree in co-relation 3082. Up to 223 conditions per place. [2024-06-21 17:58:03,829 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 61 selfloop transitions, 53 changer transitions 6/122 dead transitions. [2024-06-21 17:58:03,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 122 transitions, 1389 flow [2024-06-21 17:58:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 17:58:03,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2024-06-21 17:58:03,842 INFO L175 Difference]: Start difference. First operand has 125 places, 102 transitions, 1003 flow. Second operand 8 states and 97 transitions. [2024-06-21 17:58:03,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 122 transitions, 1389 flow [2024-06-21 17:58:03,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 122 transitions, 1323 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:03,874 INFO L231 Difference]: Finished difference. Result has 126 places, 101 transitions, 1041 flow [2024-06-21 17:58:03,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1041, PETRI_PLACES=126, PETRI_TRANSITIONS=101} [2024-06-21 17:58:03,874 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2024-06-21 17:58:03,874 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 101 transitions, 1041 flow [2024-06-21 17:58:03,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:03,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:03,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:03,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:58:03,875 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:03,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash -490226485, now seen corresponding path program 2 times [2024-06-21 17:58:03,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447504625] [2024-06-21 17:58:03,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:04,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:04,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447504625] [2024-06-21 17:58:04,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447504625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:04,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:04,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:04,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899669817] [2024-06-21 17:58:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:04,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:04,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 101 transitions, 1041 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:04,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:04,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:04,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:04,626 INFO L124 PetriNetUnfolderBase]: 288/569 cut-off events. [2024-06-21 17:58:04,626 INFO L125 PetriNetUnfolderBase]: For 16817/16817 co-relation queries the response was YES. [2024-06-21 17:58:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 569 events. 288/569 cut-off events. For 16817/16817 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2645 event pairs, 67 based on Foata normal form. 12/576 useless extension candidates. Maximal degree in co-relation 3000. Up to 311 conditions per place. [2024-06-21 17:58:04,630 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 56 selfloop transitions, 52 changer transitions 7/117 dead transitions. [2024-06-21 17:58:04,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 117 transitions, 1343 flow [2024-06-21 17:58:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 17:58:04,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-21 17:58:04,631 INFO L175 Difference]: Start difference. First operand has 126 places, 101 transitions, 1041 flow. Second operand 8 states and 94 transitions. [2024-06-21 17:58:04,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 117 transitions, 1343 flow [2024-06-21 17:58:04,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 1235 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:04,663 INFO L231 Difference]: Finished difference. Result has 126 places, 99 transitions, 1038 flow [2024-06-21 17:58:04,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1038, PETRI_PLACES=126, PETRI_TRANSITIONS=99} [2024-06-21 17:58:04,664 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2024-06-21 17:58:04,664 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 99 transitions, 1038 flow [2024-06-21 17:58:04,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:04,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:04,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:58:04,664 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:04,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:04,665 INFO L85 PathProgramCache]: Analyzing trace with hash -495940777, now seen corresponding path program 6 times [2024-06-21 17:58:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156427817] [2024-06-21 17:58:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:05,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:05,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156427817] [2024-06-21 17:58:05,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156427817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:05,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:05,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:05,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141760192] [2024-06-21 17:58:05,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:05,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:05,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:05,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:05,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 99 transitions, 1038 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:05,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:05,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:05,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:05,425 INFO L124 PetriNetUnfolderBase]: 246/483 cut-off events. [2024-06-21 17:58:05,425 INFO L125 PetriNetUnfolderBase]: For 8237/8237 co-relation queries the response was YES. [2024-06-21 17:58:05,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2573 conditions, 483 events. 246/483 cut-off events. For 8237/8237 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2155 event pairs, 45 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2514. Up to 273 conditions per place. [2024-06-21 17:58:05,429 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 65 selfloop transitions, 44 changer transitions 0/111 dead transitions. [2024-06-21 17:58:05,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 111 transitions, 1308 flow [2024-06-21 17:58:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 17:58:05,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:58:05,430 INFO L175 Difference]: Start difference. First operand has 126 places, 99 transitions, 1038 flow. Second operand 8 states and 87 transitions. [2024-06-21 17:58:05,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 111 transitions, 1308 flow [2024-06-21 17:58:05,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 111 transitions, 1173 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:05,456 INFO L231 Difference]: Finished difference. Result has 127 places, 100 transitions, 1013 flow [2024-06-21 17:58:05,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1013, PETRI_PLACES=127, PETRI_TRANSITIONS=100} [2024-06-21 17:58:05,456 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2024-06-21 17:58:05,457 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 100 transitions, 1013 flow [2024-06-21 17:58:05,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:05,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:05,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:05,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:58:05,457 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:05,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash -495944497, now seen corresponding path program 7 times [2024-06-21 17:58:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576048587] [2024-06-21 17:58:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:05,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:05,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576048587] [2024-06-21 17:58:05,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576048587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:05,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:05,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:05,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707205335] [2024-06-21 17:58:05,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:05,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:05,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:05,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:05,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:06,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:06,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 100 transitions, 1013 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:06,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:06,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:06,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:06,134 INFO L124 PetriNetUnfolderBase]: 243/478 cut-off events. [2024-06-21 17:58:06,134 INFO L125 PetriNetUnfolderBase]: For 7568/7568 co-relation queries the response was YES. [2024-06-21 17:58:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 478 events. 243/478 cut-off events. For 7568/7568 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2120 event pairs, 44 based on Foata normal form. 2/475 useless extension candidates. Maximal degree in co-relation 2368. Up to 230 conditions per place. [2024-06-21 17:58:06,137 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 63 selfloop transitions, 46 changer transitions 0/111 dead transitions. [2024-06-21 17:58:06,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 111 transitions, 1263 flow [2024-06-21 17:58:06,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 17:58:06,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 17:58:06,139 INFO L175 Difference]: Start difference. First operand has 127 places, 100 transitions, 1013 flow. Second operand 8 states and 88 transitions. [2024-06-21 17:58:06,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 111 transitions, 1263 flow [2024-06-21 17:58:06,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 111 transitions, 1163 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:06,156 INFO L231 Difference]: Finished difference. Result has 129 places, 100 transitions, 1010 flow [2024-06-21 17:58:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1010, PETRI_PLACES=129, PETRI_TRANSITIONS=100} [2024-06-21 17:58:06,157 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 101 predicate places. [2024-06-21 17:58:06,157 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 100 transitions, 1010 flow [2024-06-21 17:58:06,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:06,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:06,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:58:06,157 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:06,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 125517851, now seen corresponding path program 3 times [2024-06-21 17:58:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667087367] [2024-06-21 17:58:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:06,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:06,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667087367] [2024-06-21 17:58:06,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667087367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:06,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:06,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:06,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470341027] [2024-06-21 17:58:06,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:06,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:06,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:06,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:06,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 100 transitions, 1010 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:06,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:06,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:06,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:07,017 INFO L124 PetriNetUnfolderBase]: 259/514 cut-off events. [2024-06-21 17:58:07,017 INFO L125 PetriNetUnfolderBase]: For 12257/12257 co-relation queries the response was YES. [2024-06-21 17:58:07,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 514 events. 259/514 cut-off events. For 12257/12257 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2339 event pairs, 56 based on Foata normal form. 10/519 useless extension candidates. Maximal degree in co-relation 2464. Up to 256 conditions per place. [2024-06-21 17:58:07,021 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 64 selfloop transitions, 41 changer transitions 9/116 dead transitions. [2024-06-21 17:58:07,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 116 transitions, 1298 flow [2024-06-21 17:58:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 17:58:07,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 17:58:07,023 INFO L175 Difference]: Start difference. First operand has 129 places, 100 transitions, 1010 flow. Second operand 9 states and 103 transitions. [2024-06-21 17:58:07,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 116 transitions, 1298 flow [2024-06-21 17:58:07,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 116 transitions, 1180 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:07,043 INFO L231 Difference]: Finished difference. Result has 131 places, 97 transitions, 960 flow [2024-06-21 17:58:07,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=960, PETRI_PLACES=131, PETRI_TRANSITIONS=97} [2024-06-21 17:58:07,044 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 103 predicate places. [2024-06-21 17:58:07,044 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 97 transitions, 960 flow [2024-06-21 17:58:07,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:07,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:07,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:07,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:58:07,044 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:07,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash -401625373, now seen corresponding path program 4 times [2024-06-21 17:58:07,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:07,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985006228] [2024-06-21 17:58:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:07,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:07,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:07,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985006228] [2024-06-21 17:58:07,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985006228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:07,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:07,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:07,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826798884] [2024-06-21 17:58:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:07,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:07,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:07,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:07,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 97 transitions, 960 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:07,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:07,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:07,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:07,697 INFO L124 PetriNetUnfolderBase]: 260/525 cut-off events. [2024-06-21 17:58:07,698 INFO L125 PetriNetUnfolderBase]: For 14990/14990 co-relation queries the response was YES. [2024-06-21 17:58:07,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2666 conditions, 525 events. 260/525 cut-off events. For 14990/14990 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2398 event pairs, 65 based on Foata normal form. 8/528 useless extension candidates. Maximal degree in co-relation 2605. Up to 240 conditions per place. [2024-06-21 17:58:07,701 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 66 selfloop transitions, 36 changer transitions 10/114 dead transitions. [2024-06-21 17:58:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 114 transitions, 1310 flow [2024-06-21 17:58:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 17:58:07,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 17:58:07,709 INFO L175 Difference]: Start difference. First operand has 131 places, 97 transitions, 960 flow. Second operand 8 states and 96 transitions. [2024-06-21 17:58:07,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 114 transitions, 1310 flow [2024-06-21 17:58:07,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 114 transitions, 1190 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 17:58:07,742 INFO L231 Difference]: Finished difference. Result has 127 places, 92 transitions, 888 flow [2024-06-21 17:58:07,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=127, PETRI_TRANSITIONS=92} [2024-06-21 17:58:07,743 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 99 predicate places. [2024-06-21 17:58:07,743 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 92 transitions, 888 flow [2024-06-21 17:58:07,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:07,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:07,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:07,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:58:07,744 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:07,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash -135928093, now seen corresponding path program 5 times [2024-06-21 17:58:07,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:07,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117836912] [2024-06-21 17:58:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:07,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:08,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:08,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:08,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117836912] [2024-06-21 17:58:08,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117836912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:08,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:08,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:08,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255311391] [2024-06-21 17:58:08,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:08,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:08,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:08,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:08,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 92 transitions, 888 flow. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:08,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:08,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:08,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:08,433 INFO L124 PetriNetUnfolderBase]: 251/514 cut-off events. [2024-06-21 17:58:08,433 INFO L125 PetriNetUnfolderBase]: For 16118/16118 co-relation queries the response was YES. [2024-06-21 17:58:08,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 514 events. 251/514 cut-off events. For 16118/16118 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2333 event pairs, 68 based on Foata normal form. 8/517 useless extension candidates. Maximal degree in co-relation 2528. Up to 206 conditions per place. [2024-06-21 17:58:08,436 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 64 selfloop transitions, 30 changer transitions 11/107 dead transitions. [2024-06-21 17:58:08,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 107 transitions, 1206 flow [2024-06-21 17:58:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 17:58:08,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 17:58:08,437 INFO L175 Difference]: Start difference. First operand has 127 places, 92 transitions, 888 flow. Second operand 8 states and 88 transitions. [2024-06-21 17:58:08,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 107 transitions, 1206 flow [2024-06-21 17:58:08,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 107 transitions, 1118 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 17:58:08,456 INFO L231 Difference]: Finished difference. Result has 121 places, 87 transitions, 841 flow [2024-06-21 17:58:08,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=841, PETRI_PLACES=121, PETRI_TRANSITIONS=87} [2024-06-21 17:58:08,456 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 93 predicate places. [2024-06-21 17:58:08,456 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 87 transitions, 841 flow [2024-06-21 17:58:08,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 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) [2024-06-21 17:58:08,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:08,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:08,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:58:08,457 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:08,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1814217324, now seen corresponding path program 1 times [2024-06-21 17:58:08,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:08,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316905262] [2024-06-21 17:58:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:08,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:09,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:09,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316905262] [2024-06-21 17:58:09,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316905262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:09,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:09,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:58:09,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393784618] [2024-06-21 17:58:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:09,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:58:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:58:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:58:09,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:09,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 87 transitions, 841 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:09,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:09,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:09,378 INFO L124 PetriNetUnfolderBase]: 203/410 cut-off events. [2024-06-21 17:58:09,378 INFO L125 PetriNetUnfolderBase]: For 6933/6933 co-relation queries the response was YES. [2024-06-21 17:58:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1868 conditions, 410 events. 203/410 cut-off events. For 6933/6933 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1742 event pairs, 40 based on Foata normal form. 6/413 useless extension candidates. Maximal degree in co-relation 1812. Up to 288 conditions per place. [2024-06-21 17:58:09,380 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 67 selfloop transitions, 14 changer transitions 20/103 dead transitions. [2024-06-21 17:58:09,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 103 transitions, 1083 flow [2024-06-21 17:58:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-21 17:58:09,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 17:58:09,381 INFO L175 Difference]: Start difference. First operand has 121 places, 87 transitions, 841 flow. Second operand 9 states and 90 transitions. [2024-06-21 17:58:09,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 103 transitions, 1083 flow [2024-06-21 17:58:09,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 103 transitions, 1008 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 17:58:09,393 INFO L231 Difference]: Finished difference. Result has 117 places, 79 transitions, 731 flow [2024-06-21 17:58:09,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=117, PETRI_TRANSITIONS=79} [2024-06-21 17:58:09,393 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 89 predicate places. [2024-06-21 17:58:09,393 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 79 transitions, 731 flow [2024-06-21 17:58:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:09,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:09,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:58:09,394 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:09,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1035117952, now seen corresponding path program 2 times [2024-06-21 17:58:09,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:09,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992065182] [2024-06-21 17:58:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:09,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:10,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:10,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992065182] [2024-06-21 17:58:10,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992065182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:10,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:10,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:58:10,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426303193] [2024-06-21 17:58:10,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:10,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:58:10,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:10,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:58:10,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:58:10,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:10,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 79 transitions, 731 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:10,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:10,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:10,436 INFO L124 PetriNetUnfolderBase]: 177/366 cut-off events. [2024-06-21 17:58:10,437 INFO L125 PetriNetUnfolderBase]: For 5949/5949 co-relation queries the response was YES. [2024-06-21 17:58:10,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 366 events. 177/366 cut-off events. For 5949/5949 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1532 event pairs, 29 based on Foata normal form. 6/369 useless extension candidates. Maximal degree in co-relation 1585. Up to 209 conditions per place. [2024-06-21 17:58:10,439 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 51 selfloop transitions, 20 changer transitions 20/93 dead transitions. [2024-06-21 17:58:10,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 93 transitions, 953 flow [2024-06-21 17:58:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:10,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-21 17:58:10,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 17:58:10,445 INFO L175 Difference]: Start difference. First operand has 117 places, 79 transitions, 731 flow. Second operand 9 states and 87 transitions. [2024-06-21 17:58:10,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 93 transitions, 953 flow [2024-06-21 17:58:10,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 93 transitions, 907 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:58:10,457 INFO L231 Difference]: Finished difference. Result has 109 places, 67 transitions, 610 flow [2024-06-21 17:58:10,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=610, PETRI_PLACES=109, PETRI_TRANSITIONS=67} [2024-06-21 17:58:10,458 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 81 predicate places. [2024-06-21 17:58:10,458 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 67 transitions, 610 flow [2024-06-21 17:58:10,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:10,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:58:10,459 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:10,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1035002632, now seen corresponding path program 3 times [2024-06-21 17:58:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:10,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262707445] [2024-06-21 17:58:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:10,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:11,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262707445] [2024-06-21 17:58:11,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262707445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:11,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:11,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:58:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425078593] [2024-06-21 17:58:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:11,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:58:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:58:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:58:11,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:11,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 67 transitions, 610 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:11,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:11,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:11,497 INFO L124 PetriNetUnfolderBase]: 145/314 cut-off events. [2024-06-21 17:58:11,497 INFO L125 PetriNetUnfolderBase]: For 4803/4803 co-relation queries the response was YES. [2024-06-21 17:58:11,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 314 events. 145/314 cut-off events. For 4803/4803 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1266 event pairs, 22 based on Foata normal form. 6/317 useless extension candidates. Maximal degree in co-relation 1342. Up to 165 conditions per place. [2024-06-21 17:58:11,499 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 5 changer transitions 37/81 dead transitions. [2024-06-21 17:58:11,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 81 transitions, 804 flow [2024-06-21 17:58:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-21 17:58:11,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-06-21 17:58:11,510 INFO L175 Difference]: Start difference. First operand has 109 places, 67 transitions, 610 flow. Second operand 9 states and 86 transitions. [2024-06-21 17:58:11,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 81 transitions, 804 flow [2024-06-21 17:58:11,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 81 transitions, 748 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 17:58:11,520 INFO L231 Difference]: Finished difference. Result has 100 places, 43 transitions, 314 flow [2024-06-21 17:58:11,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=314, PETRI_PLACES=100, PETRI_TRANSITIONS=43} [2024-06-21 17:58:11,524 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-06-21 17:58:11,524 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 43 transitions, 314 flow [2024-06-21 17:58:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:11,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:11,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:58:11,525 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:11,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1276036130, now seen corresponding path program 4 times [2024-06-21 17:58:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:11,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351900701] [2024-06-21 17:58:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:11,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351900701] [2024-06-21 17:58:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351900701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:12,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:12,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:12,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023857901] [2024-06-21 17:58:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:12,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:12,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:12,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 43 transitions, 314 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:12,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:12,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:12,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:12,392 INFO L124 PetriNetUnfolderBase]: 95/206 cut-off events. [2024-06-21 17:58:12,392 INFO L125 PetriNetUnfolderBase]: For 3418/3418 co-relation queries the response was YES. [2024-06-21 17:58:12,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 206 events. 95/206 cut-off events. For 3418/3418 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 670 event pairs, 18 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 808. Up to 74 conditions per place. [2024-06-21 17:58:12,393 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 23 selfloop transitions, 10 changer transitions 18/53 dead transitions. [2024-06-21 17:58:12,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 53 transitions, 442 flow [2024-06-21 17:58:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:12,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2024-06-21 17:58:12,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3232758620689655 [2024-06-21 17:58:12,395 INFO L175 Difference]: Start difference. First operand has 100 places, 43 transitions, 314 flow. Second operand 8 states and 75 transitions. [2024-06-21 17:58:12,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 53 transitions, 442 flow [2024-06-21 17:58:12,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 53 transitions, 390 flow, removed 11 selfloop flow, removed 17 redundant places. [2024-06-21 17:58:12,398 INFO L231 Difference]: Finished difference. Result has 73 places, 32 transitions, 214 flow [2024-06-21 17:58:12,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=214, PETRI_PLACES=73, PETRI_TRANSITIONS=32} [2024-06-21 17:58:12,399 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-06-21 17:58:12,399 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 32 transitions, 214 flow [2024-06-21 17:58:12,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:12,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:12,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:12,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:58:12,399 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:12,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:12,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1805590426, now seen corresponding path program 5 times [2024-06-21 17:58:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:12,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021192367] [2024-06-21 17:58:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:12,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:13,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:13,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021192367] [2024-06-21 17:58:13,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021192367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:13,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:13,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:58:13,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743454833] [2024-06-21 17:58:13,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:58:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:58:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:58:13,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:13,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 32 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:13,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:13,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:13,280 INFO L124 PetriNetUnfolderBase]: 64/157 cut-off events. [2024-06-21 17:58:13,280 INFO L125 PetriNetUnfolderBase]: For 2055/2055 co-relation queries the response was YES. [2024-06-21 17:58:13,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597 conditions, 157 events. 64/157 cut-off events. For 2055/2055 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 465 event pairs, 7 based on Foata normal form. 6/160 useless extension candidates. Maximal degree in co-relation 572. Up to 38 conditions per place. [2024-06-21 17:58:13,281 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 17 selfloop transitions, 6 changer transitions 18/43 dead transitions. [2024-06-21 17:58:13,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 43 transitions, 320 flow [2024-06-21 17:58:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-06-21 17:58:13,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2988505747126437 [2024-06-21 17:58:13,281 INFO L175 Difference]: Start difference. First operand has 73 places, 32 transitions, 214 flow. Second operand 9 states and 78 transitions. [2024-06-21 17:58:13,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 43 transitions, 320 flow [2024-06-21 17:58:13,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 43 transitions, 284 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 17:58:13,283 INFO L231 Difference]: Finished difference. Result has 65 places, 20 transitions, 111 flow [2024-06-21 17:58:13,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=111, PETRI_PLACES=65, PETRI_TRANSITIONS=20} [2024-06-21 17:58:13,284 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-06-21 17:58:13,284 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 20 transitions, 111 flow [2024-06-21 17:58:13,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:13,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:13,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:58:13,285 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:58:13,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash -650277764, now seen corresponding path program 6 times [2024-06-21 17:58:13,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:13,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651545076] [2024-06-21 17:58:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:13,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:14,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:14,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651545076] [2024-06-21 17:58:14,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651545076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:14,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:14,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:58:14,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498280237] [2024-06-21 17:58:14,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:14,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:58:14,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:58:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:58:14,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:58:14,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 20 transitions, 111 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:14,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:14,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:58:14,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:14,158 INFO L124 PetriNetUnfolderBase]: 19/54 cut-off events. [2024-06-21 17:58:14,159 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-06-21 17:58:14,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 54 events. 19/54 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 6/59 useless extension candidates. Maximal degree in co-relation 152. Up to 24 conditions per place. [2024-06-21 17:58:14,159 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-21 17:58:14,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 25 transitions, 139 flow [2024-06-21 17:58:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-06-21 17:58:14,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26436781609195403 [2024-06-21 17:58:14,160 INFO L175 Difference]: Start difference. First operand has 65 places, 20 transitions, 111 flow. Second operand 9 states and 69 transitions. [2024-06-21 17:58:14,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 25 transitions, 139 flow [2024-06-21 17:58:14,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 25 transitions, 103 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-06-21 17:58:14,161 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2024-06-21 17:58:14,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=9, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2024-06-21 17:58:14,161 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-21 17:58:14,161 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2024-06-21 17:58:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:14,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 17:58:14,164 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 17:58:14,164 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 17:58:14,175 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 17:58:14,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:58:14,176 INFO L445 BasicCegarLoop]: Path program histogram: [7, 6, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:14,179 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 17:58:14,179 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 17:58:14,182 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 17:58:14,182 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 17:58:14,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 05:58:14 BasicIcfg [2024-06-21 17:58:14,182 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 17:58:14,183 INFO L158 Benchmark]: Toolchain (without parser) took 41271.43ms. Allocated memory was 169.9MB in the beginning and 574.6MB in the end (delta: 404.8MB). Free memory was 127.9MB in the beginning and 348.7MB in the end (delta: -220.7MB). Peak memory consumption was 183.4MB. Max. memory is 16.1GB. [2024-06-21 17:58:14,183 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 117.4MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:58:14,183 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory was 85.8MB in the beginning and 85.7MB in the end (delta: 63.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:58:14,184 INFO L158 Benchmark]: CACSL2BoogieTranslator took 551.01ms. Allocated memory is still 169.9MB. Free memory was 127.5MB in the beginning and 96.0MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-21 17:58:14,184 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.03ms. Allocated memory is still 169.9MB. Free memory was 96.0MB in the beginning and 93.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:58:14,184 INFO L158 Benchmark]: Boogie Preprocessor took 90.90ms. Allocated memory is still 169.9MB. Free memory was 93.3MB in the beginning and 90.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 17:58:14,184 INFO L158 Benchmark]: RCFGBuilder took 693.76ms. Allocated memory is still 169.9MB. Free memory was 90.3MB in the beginning and 110.7MB in the end (delta: -20.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 17:58:14,185 INFO L158 Benchmark]: TraceAbstraction took 39850.36ms. Allocated memory was 169.9MB in the beginning and 574.6MB in the end (delta: 404.8MB). Free memory was 109.8MB in the beginning and 348.7MB in the end (delta: -238.9MB). Peak memory consumption was 167.8MB. Max. memory is 16.1GB. [2024-06-21 17:58:14,186 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 0.18ms. Allocated memory is still 117.4MB. Free memory is still 90.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory was 85.8MB in the beginning and 85.7MB in the end (delta: 63.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 551.01ms. Allocated memory is still 169.9MB. Free memory was 127.5MB in the beginning and 96.0MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.03ms. Allocated memory is still 169.9MB. Free memory was 96.0MB in the beginning and 93.3MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 90.90ms. Allocated memory is still 169.9MB. Free memory was 93.3MB in the beginning and 90.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 693.76ms. Allocated memory is still 169.9MB. Free memory was 90.3MB in the beginning and 110.7MB in the end (delta: -20.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 39850.36ms. Allocated memory was 169.9MB in the beginning and 574.6MB in the end (delta: 404.8MB). Free memory was 109.8MB in the beginning and 348.7MB in the end (delta: -238.9MB). Peak memory consumption was 167.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 793]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 794]: 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: 39.7s, OverallIterations: 48, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2113 SdHoareTripleChecker+Valid, 7.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1737 mSDsluCounter, 1745 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1491 mSDsCounter, 409 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9263 IncrementalHoareTripleChecker+Invalid, 9672 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 409 mSolverCounterUnsat, 254 mSDtfsCounter, 9263 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 384 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1041occurred in iteration=36, InterpolantAutomatonStates: 358, 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, 0.3s SatisfiabilityAnalysisTime, 26.7s InterpolantComputationTime, 676 NumberOfCodeBlocks, 676 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 628 ConstructedInterpolants, 0 QuantifiedInterpolants, 25141 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 17:58:14,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE