./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe029_power.oepc_pso.oepc_rmo.oepc.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.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe029_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:57:25,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:57:25,257 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:57:25,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:57:25,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:57:25,287 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:57:25,288 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:57:25,288 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:57:25,289 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:57:25,291 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:57:25,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:57:25,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:57:25,293 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:57:25,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:57:25,294 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:57:25,294 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:57:25,294 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:57:25,295 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:57:25,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:57:25,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:57:25,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:57:25,295 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:57:25,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:57:25,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:57:25,297 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:57:25,297 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:57:25,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:57:25,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:57:25,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:57:25,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:57:25,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:57:25,299 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:57:25,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:25,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:57:25,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:57:25,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:57:25,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:57:25,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:57:25,300 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:57:25,300 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:57:25,301 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:57:25,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:57:25,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:57:25,301 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:57:25,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:57:25,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:57:25,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:57:25,538 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:57:25,538 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:57:25,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:26,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:57:26,684 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:57:26,685 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe029_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:26,697 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de2e72b0/d8bdb3c3b6d1408e9a5c1f4ec506d156/FLAGbd89d4356 [2024-06-21 17:57:27,039 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4de2e72b0/d8bdb3c3b6d1408e9a5c1f4ec506d156 [2024-06-21 17:57:27,041 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:57:27,042 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:57:27,042 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe029_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 17:57:27,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:57:27,162 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:57:27,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:57:27,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:57:27,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:57:27,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:27" (1/2) ... [2024-06-21 17:57:27,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2865fe67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:27, skipping insertion in model container [2024-06-21 17:57:27,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:57:27" (1/2) ... [2024-06-21 17:57:27,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d6be596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:57:27, skipping insertion in model container [2024-06-21 17:57:27,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:27" (2/2) ... [2024-06-21 17:57:27,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2865fe67 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27, skipping insertion in model container [2024-06-21 17:57:27,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:27" (2/2) ... [2024-06-21 17:57:27,170 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:57:27,213 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:57:27,214 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:57:27,215 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 17:57:27,215 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:57:27,215 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-21 17:57:27,253 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:57:27,569 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:57:27,576 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:57:27,656 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:57:27,693 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:57:27,694 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27 WrapperNode [2024-06-21 17:57:27,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:57:27,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:57:27,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:57:27,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:57:27,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,740 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 130 [2024-06-21 17:57:27,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:57:27,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:57:27,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:57:27,741 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:57:27,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,761 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,773 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 17:57:27,774 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,781 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,782 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:57:27,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:57:27,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:57:27,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:57:27,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (1/1) ... [2024-06-21 17:57:27,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:27,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:57:27,897 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 17:57:27,916 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 17:57:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:57:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:57:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:57:27,933 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:57:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:57:27,933 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:57:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:57:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:57:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:57:27,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:57:27,935 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 17:57:28,058 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:57:28,059 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:57:28,278 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:57:28,278 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:57:28,467 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:57:28,467 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:57:28,469 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:57:28 BoogieIcfgContainer [2024-06-21 17:57:28,469 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:57:28,471 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:57:28,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:57:28,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:57:28,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:57:27" (1/4) ... [2024-06-21 17:57:28,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3113052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:57:28, skipping insertion in model container [2024-06-21 17:57:28,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:57:27" (2/4) ... [2024-06-21 17:57:28,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3113052a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:57:28, skipping insertion in model container [2024-06-21 17:57:28,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:57:27" (3/4) ... [2024-06-21 17:57:28,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3113052a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:57:28, skipping insertion in model container [2024-06-21 17:57:28,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:57:28" (4/4) ... [2024-06-21 17:57:28,477 INFO L112 eAbstractionObserver]: Analyzing ICFG safe029_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 17:57:28,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:57:28,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 17:57:28,490 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:57:28,519 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:57:28,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 17:57:28,575 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 17:57:28,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:57:28,578 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 17:57:28,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 17:57:28,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 17:57:28,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:57:28,594 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;@3d8ad0cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:57:28,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 17:57:28,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:57:28,599 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:57:28,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:57:28,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:28,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:57:28,600 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 17:57:28,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash 321409156, now seen corresponding path program 1 times [2024-06-21 17:57:28,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:28,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816496249] [2024-06-21 17:57:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:28,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:29,219 INFO 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 17:57:29,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:29,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816496249] [2024-06-21 17:57:29,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816496249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:29,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:29,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:57:29,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873217046] [2024-06-21 17:57:29,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:29,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:57:29,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:57:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:57:29,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:29,286 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 17:57:29,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:29,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:29,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:29,386 INFO L124 PetriNetUnfolderBase]: 162/296 cut-off events. [2024-06-21 17:57:29,387 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 17:57:29,389 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 20. Compared 1009 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 17:57:29,392 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 17:57:29,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 111 flow [2024-06-21 17:57:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:57:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:57:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2024-06-21 17:57:29,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-06-21 17:57:29,403 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 47 transitions. [2024-06-21 17:57:29,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 111 flow [2024-06-21 17:57:29,405 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 17:57:29,406 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 17:57:29,408 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 17:57:29,411 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 17:57:29,411 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 17:57:29,411 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 17:57:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:29,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:29,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:57:29,412 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 17:57:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -363415325, now seen corresponding path program 1 times [2024-06-21 17:57:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536673621] [2024-06-21 17:57:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:29,760 INFO 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 17:57:29,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:29,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536673621] [2024-06-21 17:57:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536673621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:29,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:29,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:57:29,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140217897] [2024-06-21 17:57:29,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:57:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:57:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:57:29,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:29,782 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 17:57:29,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:29,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:29,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:29,865 INFO L124 PetriNetUnfolderBase]: 159/291 cut-off events. [2024-06-21 17:57:29,866 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-21 17:57:29,868 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 20. 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 17:57:29,870 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 25 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-21 17:57:29,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 153 flow [2024-06-21 17:57:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:57:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:57:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-06-21 17:57:29,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-06-21 17:57:29,873 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 60 transitions. [2024-06-21 17:57:29,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 153 flow [2024-06-21 17:57:29,875 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 17:57:29,877 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-21 17:57:29,877 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 17:57:29,878 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-21 17:57:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-21 17:57:29,878 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 17:57:29,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:29,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:29,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:57:29,879 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 17:57:29,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:29,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1619027845, now seen corresponding path program 1 times [2024-06-21 17:57:29,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:29,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541806110] [2024-06-21 17:57:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:29,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:30,224 INFO 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 17:57:30,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:30,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541806110] [2024-06-21 17:57:30,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541806110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:30,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:30,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:57:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544529364] [2024-06-21 17:57:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:30,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:57:30,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:57:30,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:57:30,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:30,249 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 17:57:30,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:30,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:30,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:30,313 INFO L124 PetriNetUnfolderBase]: 160/293 cut-off events. [2024-06-21 17:57:30,314 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-06-21 17:57:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 293 events. 160/293 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1015 event pairs, 56 based on Foata normal form. 3/295 useless extension candidates. Maximal degree in co-relation 744. Up to 248 conditions per place. [2024-06-21 17:57:30,315 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 33 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2024-06-21 17:57:30,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 245 flow [2024-06-21 17:57:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:57:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:57:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-06-21 17:57:30,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-06-21 17:57:30,317 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 79 transitions. [2024-06-21 17:57:30,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 245 flow [2024-06-21 17:57:30,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 236 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:30,319 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 158 flow [2024-06-21 17:57:30,319 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=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-06-21 17:57:30,319 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-21 17:57:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 158 flow [2024-06-21 17:57:30,320 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 17:57:30,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:30,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:57:30,320 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 17:57:30,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash -934158844, now seen corresponding path program 1 times [2024-06-21 17:57:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:30,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107112175] [2024-06-21 17:57:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:30,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:30,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107112175] [2024-06-21 17:57:30,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107112175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:30,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:30,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:57:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160531553] [2024-06-21 17:57:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:57:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:57:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:57:30,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:30,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:30,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:30,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:30,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:30,909 INFO L124 PetriNetUnfolderBase]: 179/325 cut-off events. [2024-06-21 17:57:30,909 INFO L125 PetriNetUnfolderBase]: For 382/382 co-relation queries the response was YES. [2024-06-21 17:57:30,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 325 events. 179/325 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1153 event pairs, 40 based on Foata normal form. 5/329 useless extension candidates. Maximal degree in co-relation 975. Up to 204 conditions per place. [2024-06-21 17:57:30,912 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 45 selfloop transitions, 19 changer transitions 0/67 dead transitions. [2024-06-21 17:57:30,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 400 flow [2024-06-21 17:57:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:57:30,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-06-21 17:57:30,916 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 158 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:57:30,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 400 flow [2024-06-21 17:57:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 396 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 17:57:30,922 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 273 flow [2024-06-21 17:57:30,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-06-21 17:57:30,924 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-21 17:57:30,924 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 273 flow [2024-06-21 17:57:30,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:30,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:30,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:30,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:57:30,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:57:30,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:30,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1107631940, now seen corresponding path program 1 times [2024-06-21 17:57:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606043632] [2024-06-21 17:57:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:30,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606043632] [2024-06-21 17:57:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606043632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:31,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:31,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:31,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847064247] [2024-06-21 17:57:31,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:31,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:31,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:31,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:31,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 17:57:31,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 273 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 17:57:31,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:31,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 17:57:31,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:31,619 INFO L124 PetriNetUnfolderBase]: 199/377 cut-off events. [2024-06-21 17:57:31,620 INFO L125 PetriNetUnfolderBase]: For 787/787 co-relation queries the response was YES. [2024-06-21 17:57:31,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 377 events. 199/377 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1471 event pairs, 27 based on Foata normal form. 16/392 useless extension candidates. Maximal degree in co-relation 1323. Up to 172 conditions per place. [2024-06-21 17:57:31,622 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 49 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-06-21 17:57:31,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 503 flow [2024-06-21 17:57:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:57:31,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5665024630541872 [2024-06-21 17:57:31,623 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 273 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:57:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 503 flow [2024-06-21 17:57:31,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 491 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 17:57:31,626 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 307 flow [2024-06-21 17:57:31,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 17:57:31,627 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-06-21 17:57:31,627 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 307 flow [2024-06-21 17:57:31,627 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 17:57:31,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:31,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:31,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:57:31,628 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 17:57:31,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 517624212, now seen corresponding path program 1 times [2024-06-21 17:57:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:31,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438846518] [2024-06-21 17:57:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:31,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438846518] [2024-06-21 17:57:31,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438846518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:31,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:31,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:57:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074474109] [2024-06-21 17:57:31,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:57:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:57:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:57:31,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:31,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 307 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 17:57:31,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:31,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:31,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:32,059 INFO L124 PetriNetUnfolderBase]: 197/374 cut-off events. [2024-06-21 17:57:32,060 INFO L125 PetriNetUnfolderBase]: For 886/886 co-relation queries the response was YES. [2024-06-21 17:57:32,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 374 events. 197/374 cut-off events. For 886/886 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1449 event pairs, 58 based on Foata normal form. 1/374 useless extension candidates. Maximal degree in co-relation 1431. Up to 363 conditions per place. [2024-06-21 17:57:32,063 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 41 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-21 17:57:32,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 413 flow [2024-06-21 17:57:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:57:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:57:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-06-21 17:57:32,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-21 17:57:32,064 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 307 flow. Second operand 5 states and 53 transitions. [2024-06-21 17:57:32,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 413 flow [2024-06-21 17:57:32,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 367 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:32,067 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 278 flow [2024-06-21 17:57:32,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 17:57:32,069 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-06-21 17:57:32,069 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 278 flow [2024-06-21 17:57:32,069 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 17:57:32,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:32,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:32,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:57:32,070 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 17:57:32,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:32,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1134382894, now seen corresponding path program 1 times [2024-06-21 17:57:32,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:32,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139235652] [2024-06-21 17:57:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:32,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:32,341 INFO 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 17:57:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:32,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139235652] [2024-06-21 17:57:32,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139235652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:32,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:32,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:32,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175386078] [2024-06-21 17:57:32,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:32,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:32,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:32,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:32,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:32,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:32,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 278 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 17:57:32,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:32,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:32,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:32,558 INFO L124 PetriNetUnfolderBase]: 193/368 cut-off events. [2024-06-21 17:57:32,558 INFO L125 PetriNetUnfolderBase]: For 926/926 co-relation queries the response was YES. [2024-06-21 17:57:32,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 368 events. 193/368 cut-off events. For 926/926 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1419 event pairs, 56 based on Foata normal form. 2/369 useless extension candidates. Maximal degree in co-relation 1346. Up to 351 conditions per place. [2024-06-21 17:57:32,560 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 41 selfloop transitions, 8 changer transitions 0/51 dead transitions. [2024-06-21 17:57:32,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 51 transitions, 392 flow [2024-06-21 17:57:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-06-21 17:57:32,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 17:57:32,562 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 278 flow. Second operand 6 states and 62 transitions. [2024-06-21 17:57:32,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 51 transitions, 392 flow [2024-06-21 17:57:32,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 377 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:32,564 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 284 flow [2024-06-21 17:57:32,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-21 17:57:32,565 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-21 17:57:32,565 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 284 flow [2024-06-21 17:57:32,565 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 17:57:32,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:32,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:32,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:57:32,566 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 17:57:32,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1615315823, now seen corresponding path program 1 times [2024-06-21 17:57:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:32,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097620226] [2024-06-21 17:57:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:32,890 INFO 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 17:57:32,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097620226] [2024-06-21 17:57:32,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097620226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:32,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:32,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076454315] [2024-06-21 17:57:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:32,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:32,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:32,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:32,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 284 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 17:57:32,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:32,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:32,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:33,041 INFO L124 PetriNetUnfolderBase]: 194/370 cut-off events. [2024-06-21 17:57:33,042 INFO L125 PetriNetUnfolderBase]: For 1057/1057 co-relation queries the response was YES. [2024-06-21 17:57:33,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 370 events. 194/370 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1436 event pairs, 55 based on Foata normal form. 2/371 useless extension candidates. Maximal degree in co-relation 1392. Up to 325 conditions per place. [2024-06-21 17:57:33,044 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 41 selfloop transitions, 13 changer transitions 0/56 dead transitions. [2024-06-21 17:57:33,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 56 transitions, 446 flow [2024-06-21 17:57:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-21 17:57:33,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2024-06-21 17:57:33,046 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 284 flow. Second operand 6 states and 69 transitions. [2024-06-21 17:57:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 56 transitions, 446 flow [2024-06-21 17:57:33,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 420 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:33,050 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 309 flow [2024-06-21 17:57:33,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-21 17:57:33,054 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2024-06-21 17:57:33,054 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 309 flow [2024-06-21 17:57:33,054 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 17:57:33,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:33,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:57:33,055 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 17:57:33,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash -779326733, now seen corresponding path program 2 times [2024-06-21 17:57:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:33,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123111287] [2024-06-21 17:57:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:33,363 INFO 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 17:57:33,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:33,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123111287] [2024-06-21 17:57:33,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123111287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:33,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:33,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:57:33,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370898547] [2024-06-21 17:57:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:33,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:57:33,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:57:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:57:33,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:33,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 309 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 17:57:33,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:33,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:33,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:33,517 INFO L124 PetriNetUnfolderBase]: 189/360 cut-off events. [2024-06-21 17:57:33,518 INFO L125 PetriNetUnfolderBase]: For 1155/1155 co-relation queries the response was YES. [2024-06-21 17:57:33,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 360 events. 189/360 cut-off events. For 1155/1155 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1383 event pairs, 50 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 1381. Up to 346 conditions per place. [2024-06-21 17:57:33,520 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 42 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-21 17:57:33,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 423 flow [2024-06-21 17:57:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:57:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:57:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-06-21 17:57:33,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3505747126436782 [2024-06-21 17:57:33,521 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 309 flow. Second operand 6 states and 61 transitions. [2024-06-21 17:57:33,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 423 flow [2024-06-21 17:57:33,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 408 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:33,524 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 315 flow [2024-06-21 17:57:33,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-21 17:57:33,524 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-21 17:57:33,524 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 315 flow [2024-06-21 17:57:33,525 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 17:57:33,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:33,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:57:33,525 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 17:57:33,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1464817657, now seen corresponding path program 1 times [2024-06-21 17:57:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:33,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913920623] [2024-06-21 17:57:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:33,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913920623] [2024-06-21 17:57:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913920623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:33,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:33,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774197841] [2024-06-21 17:57:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:33,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:33,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:33,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 315 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 17:57:33,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:33,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:33,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:34,076 INFO L124 PetriNetUnfolderBase]: 209/394 cut-off events. [2024-06-21 17:57:34,076 INFO L125 PetriNetUnfolderBase]: For 1614/1614 co-relation queries the response was YES. [2024-06-21 17:57:34,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1532 conditions, 394 events. 209/394 cut-off events. For 1614/1614 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1531 event pairs, 41 based on Foata normal form. 6/399 useless extension candidates. Maximal degree in co-relation 1504. Up to 244 conditions per place. [2024-06-21 17:57:34,078 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 44 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2024-06-21 17:57:34,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 71 transitions, 571 flow [2024-06-21 17:57:34,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 17:57:34,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43842364532019706 [2024-06-21 17:57:34,080 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 315 flow. Second operand 7 states and 89 transitions. [2024-06-21 17:57:34,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 71 transitions, 571 flow [2024-06-21 17:57:34,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 537 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:34,084 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 403 flow [2024-06-21 17:57:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=403, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 17:57:34,084 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 30 predicate places. [2024-06-21 17:57:34,084 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 403 flow [2024-06-21 17:57:34,085 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 17:57:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:34,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:57:34,085 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 17:57:34,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1610912821, now seen corresponding path program 2 times [2024-06-21 17:57:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330965393] [2024-06-21 17:57:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:34,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330965393] [2024-06-21 17:57:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330965393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:34,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:34,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19168467] [2024-06-21 17:57:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:34,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:34,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 403 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 17:57:34,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:34,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:34,589 INFO L124 PetriNetUnfolderBase]: 215/404 cut-off events. [2024-06-21 17:57:34,589 INFO L125 PetriNetUnfolderBase]: For 1853/1853 co-relation queries the response was YES. [2024-06-21 17:57:34,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 404 events. 215/404 cut-off events. For 1853/1853 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1585 event pairs, 51 based on Foata normal form. 2/405 useless extension candidates. Maximal degree in co-relation 1712. Up to 381 conditions per place. [2024-06-21 17:57:34,592 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 53 selfloop transitions, 12 changer transitions 0/67 dead transitions. [2024-06-21 17:57:34,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 580 flow [2024-06-21 17:57:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-21 17:57:34,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-06-21 17:57:34,594 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 403 flow. Second operand 7 states and 71 transitions. [2024-06-21 17:57:34,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 580 flow [2024-06-21 17:57:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 67 transitions, 564 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:57:34,600 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 454 flow [2024-06-21 17:57:34,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=454, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 17:57:34,600 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2024-06-21 17:57:34,600 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 454 flow [2024-06-21 17:57:34,601 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 17:57:34,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:34,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:34,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:57:34,601 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 17:57:34,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1632153749, now seen corresponding path program 3 times [2024-06-21 17:57:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:34,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654969456] [2024-06-21 17:57:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:34,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654969456] [2024-06-21 17:57:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654969456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:34,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761294134] [2024-06-21 17:57:34,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:34,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:34,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:34,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 454 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 17:57:34,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:34,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:34,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:35,096 INFO L124 PetriNetUnfolderBase]: 216/406 cut-off events. [2024-06-21 17:57:35,096 INFO L125 PetriNetUnfolderBase]: For 2119/2119 co-relation queries the response was YES. [2024-06-21 17:57:35,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 406 events. 216/406 cut-off events. For 2119/2119 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1590 event pairs, 50 based on Foata normal form. 2/407 useless extension candidates. Maximal degree in co-relation 1807. Up to 370 conditions per place. [2024-06-21 17:57:35,098 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 53 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-21 17:57:35,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 662 flow [2024-06-21 17:57:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2024-06-21 17:57:35,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694581280788177 [2024-06-21 17:57:35,100 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 454 flow. Second operand 7 states and 75 transitions. [2024-06-21 17:57:35,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 662 flow [2024-06-21 17:57:35,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 644 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:35,104 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 495 flow [2024-06-21 17:57:35,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=495, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-06-21 17:57:35,105 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 40 predicate places. [2024-06-21 17:57:35,105 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 495 flow [2024-06-21 17:57:35,105 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 17:57:35,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:35,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:35,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:57:35,106 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 17:57:35,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash 779752849, now seen corresponding path program 1 times [2024-06-21 17:57:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:35,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11750877] [2024-06-21 17:57:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:35,583 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 17:57:35,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:35,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11750877] [2024-06-21 17:57:35,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11750877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:35,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:35,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732490701] [2024-06-21 17:57:35,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:35,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:35,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:35,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 495 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 17:57:35,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:35,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:35,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:35,824 INFO L124 PetriNetUnfolderBase]: 213/401 cut-off events. [2024-06-21 17:57:35,824 INFO L125 PetriNetUnfolderBase]: For 2316/2316 co-relation queries the response was YES. [2024-06-21 17:57:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 401 events. 213/401 cut-off events. For 2316/2316 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1561 event pairs, 49 based on Foata normal form. 2/402 useless extension candidates. Maximal degree in co-relation 1809. Up to 378 conditions per place. [2024-06-21 17:57:35,827 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 57 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-21 17:57:35,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 69 transitions, 647 flow [2024-06-21 17:57:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2024-06-21 17:57:35,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3399014778325123 [2024-06-21 17:57:35,828 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 495 flow. Second operand 7 states and 69 transitions. [2024-06-21 17:57:35,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 69 transitions, 647 flow [2024-06-21 17:57:35,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 617 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:35,833 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 489 flow [2024-06-21 17:57:35,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-06-21 17:57:35,834 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-06-21 17:57:35,834 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 489 flow [2024-06-21 17:57:35,834 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 17:57:35,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:35,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:35,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:57:35,835 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 17:57:35,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 795136220, now seen corresponding path program 1 times [2024-06-21 17:57:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:35,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534006312] [2024-06-21 17:57:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:36,239 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 17:57:36,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534006312] [2024-06-21 17:57:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534006312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:36,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:36,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:36,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346044318] [2024-06-21 17:57:36,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:36,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:36,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:36,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:36,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:36,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:36,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 489 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 17:57:36,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:36,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:36,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:36,433 INFO L124 PetriNetUnfolderBase]: 209/394 cut-off events. [2024-06-21 17:57:36,433 INFO L125 PetriNetUnfolderBase]: For 2436/2436 co-relation queries the response was YES. [2024-06-21 17:57:36,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 394 events. 209/394 cut-off events. For 2436/2436 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1527 event pairs, 49 based on Foata normal form. 1/394 useless extension candidates. Maximal degree in co-relation 1768. Up to 334 conditions per place. [2024-06-21 17:57:36,435 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 57 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-21 17:57:36,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 689 flow [2024-06-21 17:57:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 17:57:36,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 17:57:36,437 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 489 flow. Second operand 8 states and 88 transitions. [2024-06-21 17:57:36,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 689 flow [2024-06-21 17:57:36,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 661 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:36,443 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 527 flow [2024-06-21 17:57:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=527, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-06-21 17:57:36,444 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 17:57:36,444 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 527 flow [2024-06-21 17:57:36,444 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 17:57:36,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:36,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:57:36,445 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 17:57:36,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1835292457, now seen corresponding path program 1 times [2024-06-21 17:57:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:36,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356779916] [2024-06-21 17:57:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:36,770 INFO 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 17:57:36,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:36,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356779916] [2024-06-21 17:57:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356779916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:36,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:36,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907804240] [2024-06-21 17:57:36,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:36,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:36,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:36,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:36,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 527 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 17:57:36,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:36,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:36,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:36,939 INFO L124 PetriNetUnfolderBase]: 225/420 cut-off events. [2024-06-21 17:57:36,939 INFO L125 PetriNetUnfolderBase]: For 3052/3052 co-relation queries the response was YES. [2024-06-21 17:57:36,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 420 events. 225/420 cut-off events. For 3052/3052 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1647 event pairs, 38 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 1940. Up to 244 conditions per place. [2024-06-21 17:57:36,942 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 46 selfloop transitions, 33 changer transitions 1/82 dead transitions. [2024-06-21 17:57:36,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 82 transitions, 809 flow [2024-06-21 17:57:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-21 17:57:36,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-06-21 17:57:36,943 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 527 flow. Second operand 7 states and 86 transitions. [2024-06-21 17:57:36,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 82 transitions, 809 flow [2024-06-21 17:57:36,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 773 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:36,950 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 601 flow [2024-06-21 17:57:36,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-06-21 17:57:36,951 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-21 17:57:36,951 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 601 flow [2024-06-21 17:57:36,951 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 17:57:36,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:36,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:36,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:57:36,951 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 17:57:36,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:36,952 INFO L85 PathProgramCache]: Analyzing trace with hash 798945655, now seen corresponding path program 2 times [2024-06-21 17:57:36,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:36,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507204646] [2024-06-21 17:57:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:36,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:37,273 INFO 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 17:57:37,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:37,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507204646] [2024-06-21 17:57:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507204646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:37,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:37,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644520004] [2024-06-21 17:57:37,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:37,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:37,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:37,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 601 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 17:57:37,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:37,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:37,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:37,472 INFO L124 PetriNetUnfolderBase]: 213/404 cut-off events. [2024-06-21 17:57:37,473 INFO L125 PetriNetUnfolderBase]: For 3446/3446 co-relation queries the response was YES. [2024-06-21 17:57:37,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 404 events. 213/404 cut-off events. For 3446/3446 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1583 event pairs, 38 based on Foata normal form. 4/407 useless extension candidates. Maximal degree in co-relation 1955. Up to 240 conditions per place. [2024-06-21 17:57:37,475 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 46 selfloop transitions, 35 changer transitions 1/84 dead transitions. [2024-06-21 17:57:37,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 873 flow [2024-06-21 17:57:37,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 17:57:37,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-06-21 17:57:37,481 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 601 flow. Second operand 7 states and 91 transitions. [2024-06-21 17:57:37,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 873 flow [2024-06-21 17:57:37,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 84 transitions, 842 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:57:37,488 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 639 flow [2024-06-21 17:57:37,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-06-21 17:57:37,489 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-06-21 17:57:37,489 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 639 flow [2024-06-21 17:57:37,490 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 17:57:37,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:37,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:37,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:57:37,491 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 17:57:37,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1601309669, now seen corresponding path program 3 times [2024-06-21 17:57:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698195434] [2024-06-21 17:57:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:37,820 INFO 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 17:57:37,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:37,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698195434] [2024-06-21 17:57:37,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698195434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:37,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:37,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:57:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712688924] [2024-06-21 17:57:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:57:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:57:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:57:37,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:37,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 639 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 17:57:37,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:37,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:37,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:38,005 INFO L124 PetriNetUnfolderBase]: 208/397 cut-off events. [2024-06-21 17:57:38,006 INFO L125 PetriNetUnfolderBase]: For 3603/3603 co-relation queries the response was YES. [2024-06-21 17:57:38,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 397 events. 208/397 cut-off events. For 3603/3603 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1556 event pairs, 40 based on Foata normal form. 2/398 useless extension candidates. Maximal degree in co-relation 1977. Up to 366 conditions per place. [2024-06-21 17:57:38,008 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 61 selfloop transitions, 12 changer transitions 1/76 dead transitions. [2024-06-21 17:57:38,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 831 flow [2024-06-21 17:57:38,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 73 transitions. [2024-06-21 17:57:38,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-06-21 17:57:38,009 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 639 flow. Second operand 7 states and 73 transitions. [2024-06-21 17:57:38,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 831 flow [2024-06-21 17:57:38,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 745 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:38,016 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 594 flow [2024-06-21 17:57:38,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=594, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-06-21 17:57:38,017 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2024-06-21 17:57:38,017 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 594 flow [2024-06-21 17:57:38,018 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 17:57:38,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:38,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:38,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:57:38,018 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 17:57:38,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1601042542, now seen corresponding path program 1 times [2024-06-21 17:57:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914815425] [2024-06-21 17:57:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:38,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:38,529 INFO 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 17:57:38,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:38,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914815425] [2024-06-21 17:57:38,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914815425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:38,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:38,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:38,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582450563] [2024-06-21 17:57:38,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:38,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:38,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:38,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:38,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 594 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 17:57:38,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:38,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:38,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:38,759 INFO L124 PetriNetUnfolderBase]: 195/377 cut-off events. [2024-06-21 17:57:38,760 INFO L125 PetriNetUnfolderBase]: For 3344/3344 co-relation queries the response was YES. [2024-06-21 17:57:38,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1866 conditions, 377 events. 195/377 cut-off events. For 3344/3344 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1480 event pairs, 37 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1826. Up to 351 conditions per place. [2024-06-21 17:57:38,762 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 59 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 17:57:38,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 758 flow [2024-06-21 17:57:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:57:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:57:38,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2024-06-21 17:57:38,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-06-21 17:57:38,763 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 594 flow. Second operand 7 states and 71 transitions. [2024-06-21 17:57:38,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 758 flow [2024-06-21 17:57:38,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 732 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:38,770 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 602 flow [2024-06-21 17:57:38,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-06-21 17:57:38,771 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-21 17:57:38,771 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 602 flow [2024-06-21 17:57:38,771 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 17:57:38,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:38,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:38,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:57:38,772 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 17:57:38,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1175077890, now seen corresponding path program 1 times [2024-06-21 17:57:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:38,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076871854] [2024-06-21 17:57:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:39,235 INFO 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 17:57:39,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:39,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076871854] [2024-06-21 17:57:39,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076871854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:39,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:39,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507077840] [2024-06-21 17:57:39,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:39,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:39,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:39,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:39,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 602 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 17:57:39,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:39,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:39,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:39,465 INFO L124 PetriNetUnfolderBase]: 228/444 cut-off events. [2024-06-21 17:57:39,465 INFO L125 PetriNetUnfolderBase]: For 5605/5605 co-relation queries the response was YES. [2024-06-21 17:57:39,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 444 events. 228/444 cut-off events. For 5605/5605 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1852 event pairs, 36 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 2217. Up to 153 conditions per place. [2024-06-21 17:57:39,469 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 59 selfloop transitions, 31 changer transitions 0/92 dead transitions. [2024-06-21 17:57:39,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 970 flow [2024-06-21 17:57:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 17:57:39,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267241379310345 [2024-06-21 17:57:39,470 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 602 flow. Second operand 8 states and 99 transitions. [2024-06-21 17:57:39,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 970 flow [2024-06-21 17:57:39,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 92 transitions, 922 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:39,479 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 636 flow [2024-06-21 17:57:39,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2024-06-21 17:57:39,480 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2024-06-21 17:57:39,480 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 636 flow [2024-06-21 17:57:39,480 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 17:57:39,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:39,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:39,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:57:39,481 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 17:57:39,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1177756290, now seen corresponding path program 2 times [2024-06-21 17:57:39,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:39,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973128366] [2024-06-21 17:57:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:39,930 INFO 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 17:57:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973128366] [2024-06-21 17:57:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973128366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:39,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701715392] [2024-06-21 17:57:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:39,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:39,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 636 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 17:57:39,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:39,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:39,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:40,139 INFO L124 PetriNetUnfolderBase]: 225/439 cut-off events. [2024-06-21 17:57:40,139 INFO L125 PetriNetUnfolderBase]: For 5394/5394 co-relation queries the response was YES. [2024-06-21 17:57:40,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2252 conditions, 439 events. 225/439 cut-off events. For 5394/5394 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1844 event pairs, 59 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2211. Up to 373 conditions per place. [2024-06-21 17:57:40,142 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 62 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 17:57:40,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 83 transitions, 836 flow [2024-06-21 17:57:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 17:57:40,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 17:57:40,143 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 636 flow. Second operand 9 states and 96 transitions. [2024-06-21 17:57:40,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 83 transitions, 836 flow [2024-06-21 17:57:40,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 83 transitions, 775 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:57:40,152 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 617 flow [2024-06-21 17:57:40,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=617, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-21 17:57:40,153 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-21 17:57:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 617 flow [2024-06-21 17:57:40,153 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 17:57:40,153 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, 1, 1, 1] [2024-06-21 17:57:40,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:57:40,154 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 17:57:40,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1174955006, now seen corresponding path program 1 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 [804834415] [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 17:57:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:40,707 INFO 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 17:57:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:40,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804834415] [2024-06-21 17:57:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804834415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:40,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:40,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301382989] [2024-06-21 17:57:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:40,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 617 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 17:57:40,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:40,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:40,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:40,998 INFO L124 PetriNetUnfolderBase]: 221/433 cut-off events. [2024-06-21 17:57:40,998 INFO L125 PetriNetUnfolderBase]: For 5495/5495 co-relation queries the response was YES. [2024-06-21 17:57:40,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 433 events. 221/433 cut-off events. For 5495/5495 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1822 event pairs, 47 based on Foata normal form. 2/434 useless extension candidates. Maximal degree in co-relation 2140. Up to 286 conditions per place. [2024-06-21 17:57:41,001 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 47 selfloop transitions, 33 changer transitions 0/82 dead transitions. [2024-06-21 17:57:41,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 82 transitions, 855 flow [2024-06-21 17:57:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 17:57:41,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-21 17:57:41,002 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 617 flow. Second operand 8 states and 95 transitions. [2024-06-21 17:57:41,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 82 transitions, 855 flow [2024-06-21 17:57:41,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 802 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:41,011 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 635 flow [2024-06-21 17:57:41,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=635, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-06-21 17:57:41,012 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-21 17:57:41,012 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 635 flow [2024-06-21 17:57:41,012 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 17:57:41,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:41,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:41,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:57:41,013 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 17:57:41,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1059483912, now seen corresponding path program 1 times [2024-06-21 17:57:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:41,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387275614] [2024-06-21 17:57:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:41,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387275614] [2024-06-21 17:57:41,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387275614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:41,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:41,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058433029] [2024-06-21 17:57:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:41,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:41,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 635 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 17:57:41,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:41,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:41,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:41,914 INFO L124 PetriNetUnfolderBase]: 216/426 cut-off events. [2024-06-21 17:57:41,914 INFO L125 PetriNetUnfolderBase]: For 6545/6545 co-relation queries the response was YES. [2024-06-21 17:57:41,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 426 events. 216/426 cut-off events. For 6545/6545 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1782 event pairs, 40 based on Foata normal form. 14/439 useless extension candidates. Maximal degree in co-relation 1958. Up to 225 conditions per place. [2024-06-21 17:57:41,917 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 48 selfloop transitions, 32 changer transitions 7/89 dead transitions. [2024-06-21 17:57:41,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 919 flow [2024-06-21 17:57:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:41,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 17:57:41,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2024-06-21 17:57:41,918 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 635 flow. Second operand 8 states and 101 transitions. [2024-06-21 17:57:41,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 919 flow [2024-06-21 17:57:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 830 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:41,927 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 607 flow [2024-06-21 17:57:41,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2024-06-21 17:57:41,928 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-06-21 17:57:41,928 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 607 flow [2024-06-21 17:57:41,928 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 17:57:41,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:41,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:41,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:57:41,928 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 17:57:41,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1907586100, now seen corresponding path program 2 times [2024-06-21 17:57:41,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:41,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795751483] [2024-06-21 17:57:41,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:41,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:42,478 INFO 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 17:57:42,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:42,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795751483] [2024-06-21 17:57:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795751483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:42,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:42,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:42,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764173466] [2024-06-21 17:57:42,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:42,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:42,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:42,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:42,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 607 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 17:57:42,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:42,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:42,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:42,745 INFO L124 PetriNetUnfolderBase]: 196/386 cut-off events. [2024-06-21 17:57:42,746 INFO L125 PetriNetUnfolderBase]: For 4416/4416 co-relation queries the response was YES. [2024-06-21 17:57:42,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 386 events. 196/386 cut-off events. For 4416/4416 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1526 event pairs, 35 based on Foata normal form. 2/387 useless extension candidates. Maximal degree in co-relation 1851. Up to 355 conditions per place. [2024-06-21 17:57:42,748 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 64 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-21 17:57:42,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 787 flow [2024-06-21 17:57:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2024-06-21 17:57:42,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33189655172413796 [2024-06-21 17:57:42,750 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 607 flow. Second operand 8 states and 77 transitions. [2024-06-21 17:57:42,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 787 flow [2024-06-21 17:57:42,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 77 transitions, 702 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:42,760 INFO L231 Difference]: Finished difference. Result has 90 places, 67 transitions, 558 flow [2024-06-21 17:57:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=558, PETRI_PLACES=90, PETRI_TRANSITIONS=67} [2024-06-21 17:57:42,760 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-06-21 17:57:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 67 transitions, 558 flow [2024-06-21 17:57:42,761 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 17:57:42,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:42,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:57:42,761 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 17:57:42,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1896357624, now seen corresponding path program 3 times [2024-06-21 17:57:42,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:42,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058762175] [2024-06-21 17:57:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:43,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058762175] [2024-06-21 17:57:43,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058762175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:43,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:43,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:43,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881668587] [2024-06-21 17:57:43,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:43,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:43,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:43,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:43,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:43,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 67 transitions, 558 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 17:57:43,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:43,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:43,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:43,557 INFO L124 PetriNetUnfolderBase]: 200/394 cut-off events. [2024-06-21 17:57:43,557 INFO L125 PetriNetUnfolderBase]: For 4681/4681 co-relation queries the response was YES. [2024-06-21 17:57:43,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 394 events. 200/394 cut-off events. For 4681/4681 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1603 event pairs, 35 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 1825. Up to 360 conditions per place. [2024-06-21 17:57:43,560 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 62 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-21 17:57:43,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 78 transitions, 744 flow [2024-06-21 17:57:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-06-21 17:57:43,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34051724137931033 [2024-06-21 17:57:43,561 INFO L175 Difference]: Start difference. First operand has 90 places, 67 transitions, 558 flow. Second operand 8 states and 79 transitions. [2024-06-21 17:57:43,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 78 transitions, 744 flow [2024-06-21 17:57:43,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 718 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:43,570 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 577 flow [2024-06-21 17:57:43,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=577, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2024-06-21 17:57:43,571 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 64 predicate places. [2024-06-21 17:57:43,571 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 577 flow [2024-06-21 17:57:43,571 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 17:57:43,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:43,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:43,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:57:43,572 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 17:57:43,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1896357376, now seen corresponding path program 1 times [2024-06-21 17:57:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:43,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773637978] [2024-06-21 17:57:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:43,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:44,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773637978] [2024-06-21 17:57:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773637978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:44,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:44,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:44,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298193324] [2024-06-21 17:57:44,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:44,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:44,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:44,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 577 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 17:57:44,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:44,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:44,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:44,311 INFO L124 PetriNetUnfolderBase]: 195/379 cut-off events. [2024-06-21 17:57:44,311 INFO L125 PetriNetUnfolderBase]: For 4546/4546 co-relation queries the response was YES. [2024-06-21 17:57:44,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 379 events. 195/379 cut-off events. For 4546/4546 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1513 event pairs, 34 based on Foata normal form. 1/379 useless extension candidates. Maximal degree in co-relation 1770. Up to 342 conditions per place. [2024-06-21 17:57:44,314 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 57 selfloop transitions, 16 changer transitions 3/78 dead transitions. [2024-06-21 17:57:44,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 78 transitions, 763 flow [2024-06-21 17:57:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-06-21 17:57:44,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34051724137931033 [2024-06-21 17:57:44,315 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 577 flow. Second operand 8 states and 79 transitions. [2024-06-21 17:57:44,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 78 transitions, 763 flow [2024-06-21 17:57:44,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 78 transitions, 728 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:44,326 INFO L231 Difference]: Finished difference. Result has 95 places, 67 transitions, 562 flow [2024-06-21 17:57:44,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=562, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2024-06-21 17:57:44,326 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2024-06-21 17:57:44,327 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 562 flow [2024-06-21 17:57:44,327 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 17:57:44,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:44,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:44,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:57:44,327 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 17:57:44,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1671114070, now seen corresponding path program 4 times [2024-06-21 17:57:44,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286362297] [2024-06-21 17:57:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:44,820 INFO 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 17:57:44,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286362297] [2024-06-21 17:57:44,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286362297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:44,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:44,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:44,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659542786] [2024-06-21 17:57:44,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:44,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:44,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:44,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:44,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 562 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 17:57:44,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:44,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:44,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:45,016 INFO L124 PetriNetUnfolderBase]: 175/339 cut-off events. [2024-06-21 17:57:45,017 INFO L125 PetriNetUnfolderBase]: For 4536/4536 co-relation queries the response was YES. [2024-06-21 17:57:45,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 339 events. 175/339 cut-off events. For 4536/4536 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1303 event pairs, 28 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 1601. Up to 298 conditions per place. [2024-06-21 17:57:45,019 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 57 selfloop transitions, 18 changer transitions 0/77 dead transitions. [2024-06-21 17:57:45,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 77 transitions, 738 flow [2024-06-21 17:57:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-21 17:57:45,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-21 17:57:45,024 INFO L175 Difference]: Start difference. First operand has 95 places, 67 transitions, 562 flow. Second operand 8 states and 82 transitions. [2024-06-21 17:57:45,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 77 transitions, 738 flow [2024-06-21 17:57:45,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 77 transitions, 651 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:57:45,035 INFO L231 Difference]: Finished difference. Result has 93 places, 67 transitions, 515 flow [2024-06-21 17:57:45,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=93, PETRI_TRANSITIONS=67} [2024-06-21 17:57:45,036 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-06-21 17:57:45,036 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 67 transitions, 515 flow [2024-06-21 17:57:45,037 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 17:57:45,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:45,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:45,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:57:45,037 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 17:57:45,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:45,037 INFO L85 PathProgramCache]: Analyzing trace with hash -378341826, now seen corresponding path program 1 times [2024-06-21 17:57:45,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:45,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613694165] [2024-06-21 17:57:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:45,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:45,406 INFO 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 17:57:45,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613694165] [2024-06-21 17:57:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613694165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:45,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97617386] [2024-06-21 17:57:45,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:45,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:45,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:45,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 67 transitions, 515 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 17:57:45,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:45,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:45,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:45,607 INFO L124 PetriNetUnfolderBase]: 209/413 cut-off events. [2024-06-21 17:57:45,607 INFO L125 PetriNetUnfolderBase]: For 8551/8551 co-relation queries the response was YES. [2024-06-21 17:57:45,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1934 conditions, 413 events. 209/413 cut-off events. For 8551/8551 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1699 event pairs, 49 based on Foata normal form. 8/420 useless extension candidates. Maximal degree in co-relation 1888. Up to 172 conditions per place. [2024-06-21 17:57:45,610 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 52 selfloop transitions, 22 changer transitions 12/88 dead transitions. [2024-06-21 17:57:45,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 88 transitions, 799 flow [2024-06-21 17:57:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 17:57:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-21 17:57:45,613 INFO L175 Difference]: Start difference. First operand has 93 places, 67 transitions, 515 flow. Second operand 8 states and 94 transitions. [2024-06-21 17:57:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 88 transitions, 799 flow [2024-06-21 17:57:45,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 88 transitions, 736 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:45,624 INFO L231 Difference]: Finished difference. Result has 94 places, 65 transitions, 488 flow [2024-06-21 17:57:45,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=488, PETRI_PLACES=94, PETRI_TRANSITIONS=65} [2024-06-21 17:57:45,625 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-21 17:57:45,625 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 65 transitions, 488 flow [2024-06-21 17:57:45,625 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 17:57:45,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:45,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:45,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:57:45,626 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 17:57:45,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1154607622, now seen corresponding path program 2 times [2024-06-21 17:57:45,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:45,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60457804] [2024-06-21 17:57:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:45,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:46,007 INFO 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 17:57:46,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60457804] [2024-06-21 17:57:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60457804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:46,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203334345] [2024-06-21 17:57:46,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:46,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:46,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:46,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:46,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 65 transitions, 488 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 17:57:46,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:46,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:46,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:46,198 INFO L124 PetriNetUnfolderBase]: 230/460 cut-off events. [2024-06-21 17:57:46,198 INFO L125 PetriNetUnfolderBase]: For 12351/12351 co-relation queries the response was YES. [2024-06-21 17:57:46,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 460 events. 230/460 cut-off events. For 12351/12351 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1990 event pairs, 60 based on Foata normal form. 8/467 useless extension candidates. Maximal degree in co-relation 2226. Up to 205 conditions per place. [2024-06-21 17:57:46,201 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 47 selfloop transitions, 26 changer transitions 12/87 dead transitions. [2024-06-21 17:57:46,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 87 transitions, 778 flow [2024-06-21 17:57:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 17:57:46,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-06-21 17:57:46,203 INFO L175 Difference]: Start difference. First operand has 94 places, 65 transitions, 488 flow. Second operand 8 states and 100 transitions. [2024-06-21 17:57:46,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 87 transitions, 778 flow [2024-06-21 17:57:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 740 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:46,215 INFO L231 Difference]: Finished difference. Result has 93 places, 61 transitions, 482 flow [2024-06-21 17:57:46,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=482, PETRI_PLACES=93, PETRI_TRANSITIONS=61} [2024-06-21 17:57:46,216 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-06-21 17:57:46,216 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 61 transitions, 482 flow [2024-06-21 17:57:46,216 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 17:57:46,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:46,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:46,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:57:46,216 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 17:57:46,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2063866324, now seen corresponding path program 3 times [2024-06-21 17:57:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:46,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512780804] [2024-06-21 17:57:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:46,782 INFO 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 17:57:46,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:46,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512780804] [2024-06-21 17:57:46,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512780804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:46,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:46,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:46,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842426162] [2024-06-21 17:57:46,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:46,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:46,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:46,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:46,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 61 transitions, 482 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 17:57:46,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:46,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:46,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:47,077 INFO L124 PetriNetUnfolderBase]: 196/394 cut-off events. [2024-06-21 17:57:47,078 INFO L125 PetriNetUnfolderBase]: For 9054/9054 co-relation queries the response was YES. [2024-06-21 17:57:47,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 394 events. 196/394 cut-off events. For 9054/9054 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1619 event pairs, 49 based on Foata normal form. 10/403 useless extension candidates. Maximal degree in co-relation 1829. Up to 205 conditions per place. [2024-06-21 17:57:47,082 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 39 selfloop transitions, 24 changer transitions 15/80 dead transitions. [2024-06-21 17:57:47,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 80 transitions, 698 flow [2024-06-21 17:57:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 17:57:47,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 17:57:47,083 INFO L175 Difference]: Start difference. First operand has 93 places, 61 transitions, 482 flow. Second operand 9 states and 103 transitions. [2024-06-21 17:57:47,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 80 transitions, 698 flow [2024-06-21 17:57:47,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 80 transitions, 640 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:57:47,092 INFO L231 Difference]: Finished difference. Result has 90 places, 55 transitions, 439 flow [2024-06-21 17:57:47,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=439, PETRI_PLACES=90, PETRI_TRANSITIONS=55} [2024-06-21 17:57:47,093 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-06-21 17:57:47,093 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 55 transitions, 439 flow [2024-06-21 17:57:47,094 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 17:57:47,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:47,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:47,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:57:47,094 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 17:57:47,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1510012076, now seen corresponding path program 4 times [2024-06-21 17:57:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:47,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450402966] [2024-06-21 17:57:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:47,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:47,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450402966] [2024-06-21 17:57:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450402966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:47,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:47,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438971956] [2024-06-21 17:57:47,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:47,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:47,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:47,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:47,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:47,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:47,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 55 transitions, 439 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 17:57:47,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:47,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:47,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:47,675 INFO L124 PetriNetUnfolderBase]: 179/363 cut-off events. [2024-06-21 17:57:47,675 INFO L125 PetriNetUnfolderBase]: For 9003/9003 co-relation queries the response was YES. [2024-06-21 17:57:47,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 363 events. 179/363 cut-off events. For 9003/9003 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1484 event pairs, 55 based on Foata normal form. 8/370 useless extension candidates. Maximal degree in co-relation 1792. Up to 143 conditions per place. [2024-06-21 17:57:47,677 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 40 selfloop transitions, 24 changer transitions 7/73 dead transitions. [2024-06-21 17:57:47,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 73 transitions, 681 flow [2024-06-21 17:57:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 17:57:47,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-06-21 17:57:47,678 INFO L175 Difference]: Start difference. First operand has 90 places, 55 transitions, 439 flow. Second operand 8 states and 90 transitions. [2024-06-21 17:57:47,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 73 transitions, 681 flow [2024-06-21 17:57:47,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 599 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 17:57:47,685 INFO L231 Difference]: Finished difference. Result has 85 places, 53 transitions, 399 flow [2024-06-21 17:57:47,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=399, PETRI_PLACES=85, PETRI_TRANSITIONS=53} [2024-06-21 17:57:47,686 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2024-06-21 17:57:47,686 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 53 transitions, 399 flow [2024-06-21 17:57:47,686 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 17:57:47,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:47,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:47,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:57:47,687 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 17:57:47,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash -762192212, now seen corresponding path program 5 times [2024-06-21 17:57:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:47,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475594193] [2024-06-21 17:57:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:47,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:48,074 INFO 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 17:57:48,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:48,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475594193] [2024-06-21 17:57:48,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475594193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:48,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:48,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:48,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351663355] [2024-06-21 17:57:48,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:48,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:48,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:48,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:48,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 53 transitions, 399 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 17:57:48,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:48,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:48,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:48,267 INFO L124 PetriNetUnfolderBase]: 167/343 cut-off events. [2024-06-21 17:57:48,267 INFO L125 PetriNetUnfolderBase]: For 8188/8188 co-relation queries the response was YES. [2024-06-21 17:57:48,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 343 events. 167/343 cut-off events. For 8188/8188 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1373 event pairs, 57 based on Foata normal form. 12/354 useless extension candidates. Maximal degree in co-relation 1603. Up to 199 conditions per place. [2024-06-21 17:57:48,269 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 33 selfloop transitions, 24 changer transitions 8/67 dead transitions. [2024-06-21 17:57:48,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 67 transitions, 573 flow [2024-06-21 17:57:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 17:57:48,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2024-06-21 17:57:48,270 INFO L175 Difference]: Start difference. First operand has 85 places, 53 transitions, 399 flow. Second operand 8 states and 86 transitions. [2024-06-21 17:57:48,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 67 transitions, 573 flow [2024-06-21 17:57:48,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 67 transitions, 527 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:57:48,276 INFO L231 Difference]: Finished difference. Result has 84 places, 49 transitions, 378 flow [2024-06-21 17:57:48,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=378, PETRI_PLACES=84, PETRI_TRANSITIONS=49} [2024-06-21 17:57:48,276 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-21 17:57:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 49 transitions, 378 flow [2024-06-21 17:57:48,277 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 17:57:48,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:48,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:57:48,277 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 17:57:48,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1006786540, now seen corresponding path program 1 times [2024-06-21 17:57:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108814900] [2024-06-21 17:57:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:48,749 INFO 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 17:57:48,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:48,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108814900] [2024-06-21 17:57:48,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108814900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:48,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:48,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:48,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700520056] [2024-06-21 17:57:48,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:48,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:48,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:48,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:48,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:48,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 49 transitions, 378 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 17:57:48,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:48,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:48,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:48,895 INFO L124 PetriNetUnfolderBase]: 146/300 cut-off events. [2024-06-21 17:57:48,895 INFO L125 PetriNetUnfolderBase]: For 5347/5347 co-relation queries the response was YES. [2024-06-21 17:57:48,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1524 conditions, 300 events. 146/300 cut-off events. For 5347/5347 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1116 event pairs, 55 based on Foata normal form. 2/301 useless extension candidates. Maximal degree in co-relation 1483. Up to 207 conditions per place. [2024-06-21 17:57:48,896 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 22 changer transitions 0/60 dead transitions. [2024-06-21 17:57:48,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 60 transitions, 528 flow [2024-06-21 17:57:48,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-21 17:57:48,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 17:57:48,898 INFO L175 Difference]: Start difference. First operand has 84 places, 49 transitions, 378 flow. Second operand 8 states and 80 transitions. [2024-06-21 17:57:48,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 60 transitions, 528 flow [2024-06-21 17:57:48,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 60 transitions, 456 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:48,904 INFO L231 Difference]: Finished difference. Result has 83 places, 50 transitions, 364 flow [2024-06-21 17:57:48,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=83, PETRI_TRANSITIONS=50} [2024-06-21 17:57:48,904 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 55 predicate places. [2024-06-21 17:57:48,904 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 50 transitions, 364 flow [2024-06-21 17:57:48,905 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 17:57:48,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:48,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:57:48,905 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 17:57:48,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1143198720, now seen corresponding path program 2 times [2024-06-21 17:57:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413942800] [2024-06-21 17:57:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:49,343 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 17:57:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413942800] [2024-06-21 17:57:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413942800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:49,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:49,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051365921] [2024-06-21 17:57:49,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:49,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:49,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:49,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 50 transitions, 364 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 17:57:49,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:49,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:49,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:49,521 INFO L124 PetriNetUnfolderBase]: 150/308 cut-off events. [2024-06-21 17:57:49,521 INFO L125 PetriNetUnfolderBase]: For 5874/5874 co-relation queries the response was YES. [2024-06-21 17:57:49,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 308 events. 150/308 cut-off events. For 5874/5874 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1185 event pairs, 53 based on Foata normal form. 2/309 useless extension candidates. Maximal degree in co-relation 1495. Up to 185 conditions per place. [2024-06-21 17:57:49,523 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 35 selfloop transitions, 24 changer transitions 0/61 dead transitions. [2024-06-21 17:57:49,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 61 transitions, 516 flow [2024-06-21 17:57:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-21 17:57:49,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-21 17:57:49,524 INFO L175 Difference]: Start difference. First operand has 83 places, 50 transitions, 364 flow. Second operand 8 states and 81 transitions. [2024-06-21 17:57:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 61 transitions, 516 flow [2024-06-21 17:57:49,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 61 transitions, 468 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:49,530 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 381 flow [2024-06-21 17:57:49,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=381, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2024-06-21 17:57:49,531 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2024-06-21 17:57:49,531 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 381 flow [2024-06-21 17:57:49,531 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 17:57:49,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:49,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:49,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:57:49,532 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 17:57:49,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1252920052, now seen corresponding path program 3 times [2024-06-21 17:57:49,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:49,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068952155] [2024-06-21 17:57:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:49,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:49,986 INFO 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 17:57:49,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:49,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068952155] [2024-06-21 17:57:49,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068952155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:49,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:49,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815620537] [2024-06-21 17:57:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:49,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:49,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:49,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:50,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:50,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 381 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 17:57:50,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:50,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:50,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:50,201 INFO L124 PetriNetUnfolderBase]: 147/303 cut-off events. [2024-06-21 17:57:50,201 INFO L125 PetriNetUnfolderBase]: For 5832/5832 co-relation queries the response was YES. [2024-06-21 17:57:50,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1517 conditions, 303 events. 147/303 cut-off events. For 5832/5832 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1148 event pairs, 54 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 1475. Up to 239 conditions per place. [2024-06-21 17:57:50,206 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 46 selfloop transitions, 16 changer transitions 0/64 dead transitions. [2024-06-21 17:57:50,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 64 transitions, 599 flow [2024-06-21 17:57:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2024-06-21 17:57:50,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35344827586206895 [2024-06-21 17:57:50,208 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 381 flow. Second operand 8 states and 82 transitions. [2024-06-21 17:57:50,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 64 transitions, 599 flow [2024-06-21 17:57:50,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 64 transitions, 546 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:57:50,215 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 390 flow [2024-06-21 17:57:50,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=390, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2024-06-21 17:57:50,215 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2024-06-21 17:57:50,216 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 390 flow [2024-06-21 17:57:50,216 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 17:57:50,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:50,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:57:50,216 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 17:57:50,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -994372612, now seen corresponding path program 4 times [2024-06-21 17:57:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:50,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821262764] [2024-06-21 17:57:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:50,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:57:50,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:50,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821262764] [2024-06-21 17:57:50,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821262764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:50,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:50,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967565089] [2024-06-21 17:57:50,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:50,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:50,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:50,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:50,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 390 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 17:57:50,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:50,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:50,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:50,878 INFO L124 PetriNetUnfolderBase]: 144/298 cut-off events. [2024-06-21 17:57:50,878 INFO L125 PetriNetUnfolderBase]: For 5971/5971 co-relation queries the response was YES. [2024-06-21 17:57:50,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 298 events. 144/298 cut-off events. For 5971/5971 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1129 event pairs, 40 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1413. Up to 259 conditions per place. [2024-06-21 17:57:50,880 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 49 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-21 17:57:50,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 63 transitions, 534 flow [2024-06-21 17:57:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 78 transitions. [2024-06-21 17:57:50,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33620689655172414 [2024-06-21 17:57:50,883 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 390 flow. Second operand 8 states and 78 transitions. [2024-06-21 17:57:50,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 63 transitions, 534 flow [2024-06-21 17:57:50,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 63 transitions, 505 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:57:50,890 INFO L231 Difference]: Finished difference. Result has 91 places, 53 transitions, 389 flow [2024-06-21 17:57:50,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=389, PETRI_PLACES=91, PETRI_TRANSITIONS=53} [2024-06-21 17:57:50,891 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-06-21 17:57:50,891 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 53 transitions, 389 flow [2024-06-21 17:57:50,891 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 17:57:50,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:50,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:50,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:57:50,892 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 17:57:50,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1003576822, now seen corresponding path program 5 times [2024-06-21 17:57:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:50,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035028654] [2024-06-21 17:57:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:50,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:51,360 INFO 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 17:57:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:51,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035028654] [2024-06-21 17:57:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035028654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:51,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:51,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:57:51,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308926512] [2024-06-21 17:57:51,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:57:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:51,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:57:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:57:51,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:51,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 53 transitions, 389 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 17:57:51,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:51,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:51,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:51,556 INFO L124 PetriNetUnfolderBase]: 141/293 cut-off events. [2024-06-21 17:57:51,556 INFO L125 PetriNetUnfolderBase]: For 5826/5826 co-relation queries the response was YES. [2024-06-21 17:57:51,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1409 conditions, 293 events. 141/293 cut-off events. For 5826/5826 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1102 event pairs, 50 based on Foata normal form. 2/294 useless extension candidates. Maximal degree in co-relation 1364. Up to 248 conditions per place. [2024-06-21 17:57:51,558 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 45 selfloop transitions, 16 changer transitions 0/63 dead transitions. [2024-06-21 17:57:51,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 63 transitions, 537 flow [2024-06-21 17:57:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-06-21 17:57:51,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 17:57:51,559 INFO L175 Difference]: Start difference. First operand has 91 places, 53 transitions, 389 flow. Second operand 8 states and 80 transitions. [2024-06-21 17:57:51,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 63 transitions, 537 flow [2024-06-21 17:57:51,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 63 transitions, 478 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:51,567 INFO L231 Difference]: Finished difference. Result has 91 places, 53 transitions, 367 flow [2024-06-21 17:57:51,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=367, PETRI_PLACES=91, PETRI_TRANSITIONS=53} [2024-06-21 17:57:51,567 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-06-21 17:57:51,567 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 53 transitions, 367 flow [2024-06-21 17:57:51,568 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 17:57:51,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:51,568 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 17:57:51,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:57:51,568 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 17:57:51,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:51,569 INFO L85 PathProgramCache]: Analyzing trace with hash -429496955, now seen corresponding path program 1 times [2024-06-21 17:57:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:51,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522721208] [2024-06-21 17:57:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:52,143 INFO 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 17:57:52,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:52,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522721208] [2024-06-21 17:57:52,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522721208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:52,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:52,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939195167] [2024-06-21 17:57:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:52,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:52,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:52,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:52,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 53 transitions, 367 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:52,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:52,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:52,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:52,344 INFO L124 PetriNetUnfolderBase]: 134/280 cut-off events. [2024-06-21 17:57:52,344 INFO L125 PetriNetUnfolderBase]: For 5766/5766 co-relation queries the response was YES. [2024-06-21 17:57:52,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 280 events. 134/280 cut-off events. For 5766/5766 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1048 event pairs, 37 based on Foata normal form. 6/285 useless extension candidates. Maximal degree in co-relation 1143. Up to 141 conditions per place. [2024-06-21 17:57:52,346 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 29 selfloop transitions, 12 changer transitions 22/65 dead transitions. [2024-06-21 17:57:52,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 65 transitions, 523 flow [2024-06-21 17:57:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:52,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-21 17:57:52,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-21 17:57:52,357 INFO L175 Difference]: Start difference. First operand has 91 places, 53 transitions, 367 flow. Second operand 8 states and 81 transitions. [2024-06-21 17:57:52,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 65 transitions, 523 flow [2024-06-21 17:57:52,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 65 transitions, 472 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:52,365 INFO L231 Difference]: Finished difference. Result has 91 places, 39 transitions, 262 flow [2024-06-21 17:57:52,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=91, PETRI_TRANSITIONS=39} [2024-06-21 17:57:52,366 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2024-06-21 17:57:52,366 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 39 transitions, 262 flow [2024-06-21 17:57:52,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:52,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:52,366 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 17:57:52,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:57:52,367 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 17:57:52,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -256776425, now seen corresponding path program 2 times [2024-06-21 17:57:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:52,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119602707] [2024-06-21 17:57:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:53,198 INFO 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 17:57:53,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119602707] [2024-06-21 17:57:53,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119602707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:53,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:57:53,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540930742] [2024-06-21 17:57:53,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:53,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:57:53,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:57:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:57:53,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:53,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 39 transitions, 262 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 17:57:53,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:53,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:53,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:53,503 INFO L124 PetriNetUnfolderBase]: 96/214 cut-off events. [2024-06-21 17:57:53,503 INFO L125 PetriNetUnfolderBase]: For 6170/6170 co-relation queries the response was YES. [2024-06-21 17:57:53,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 214 events. 96/214 cut-off events. For 6170/6170 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 741 event pairs, 35 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 899. Up to 113 conditions per place. [2024-06-21 17:57:53,504 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 20 selfloop transitions, 7 changer transitions 24/53 dead transitions. [2024-06-21 17:57:53,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 53 transitions, 398 flow [2024-06-21 17:57:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 87 transitions. [2024-06-21 17:57:53,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 17:57:53,505 INFO L175 Difference]: Start difference. First operand has 91 places, 39 transitions, 262 flow. Second operand 9 states and 87 transitions. [2024-06-21 17:57:53,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 53 transitions, 398 flow [2024-06-21 17:57:53,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 53 transitions, 358 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 17:57:53,510 INFO L231 Difference]: Finished difference. Result has 76 places, 27 transitions, 174 flow [2024-06-21 17:57:53,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=76, PETRI_TRANSITIONS=27} [2024-06-21 17:57:53,511 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2024-06-21 17:57:53,511 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 27 transitions, 174 flow [2024-06-21 17:57:53,511 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 17:57:53,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:53,511 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 17:57:53,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:57:53,511 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 17:57:53,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -760779437, now seen corresponding path program 3 times [2024-06-21 17:57:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:53,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992546792] [2024-06-21 17:57:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:54,060 INFO 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 17:57:54,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:54,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992546792] [2024-06-21 17:57:54,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992546792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:54,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:54,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:57:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030537282] [2024-06-21 17:57:54,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:54,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:57:54,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:57:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:57:54,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:54,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 27 transitions, 174 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 17:57:54,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:54,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:54,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:54,270 INFO L124 PetriNetUnfolderBase]: 55/126 cut-off events. [2024-06-21 17:57:54,270 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2024-06-21 17:57:54,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 126 events. 55/126 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 335 event pairs, 16 based on Foata normal form. 6/132 useless extension candidates. Maximal degree in co-relation 458. Up to 63 conditions per place. [2024-06-21 17:57:54,271 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 18 selfloop transitions, 5 changer transitions 14/39 dead transitions. [2024-06-21 17:57:54,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 39 transitions, 274 flow [2024-06-21 17:57:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2024-06-21 17:57:54,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103448275862069 [2024-06-21 17:57:54,272 INFO L175 Difference]: Start difference. First operand has 76 places, 27 transitions, 174 flow. Second operand 9 states and 81 transitions. [2024-06-21 17:57:54,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 39 transitions, 274 flow [2024-06-21 17:57:54,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 39 transitions, 234 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-06-21 17:57:54,273 INFO L231 Difference]: Finished difference. Result has 56 places, 23 transitions, 127 flow [2024-06-21 17:57:54,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=127, PETRI_PLACES=56, PETRI_TRANSITIONS=23} [2024-06-21 17:57:54,274 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-06-21 17:57:54,274 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 23 transitions, 127 flow [2024-06-21 17:57:54,274 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 17:57:54,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:54,274 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 17:57:54,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:57:54,274 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 17:57:54,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash -407460525, now seen corresponding path program 4 times [2024-06-21 17:57:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:54,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220913992] [2024-06-21 17:57:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:54,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:54,985 INFO 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 17:57:54,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:54,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220913992] [2024-06-21 17:57:54,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220913992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:54,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:54,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:57:54,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309674466] [2024-06-21 17:57:54,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:54,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:57:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:57:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:57:55,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:55,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 23 transitions, 127 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 17:57:55,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:55,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:55,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:55,160 INFO L124 PetriNetUnfolderBase]: 49/116 cut-off events. [2024-06-21 17:57:55,160 INFO L125 PetriNetUnfolderBase]: For 753/753 co-relation queries the response was YES. [2024-06-21 17:57:55,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 116 events. 49/116 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 303 event pairs, 17 based on Foata normal form. 6/122 useless extension candidates. Maximal degree in co-relation 374. Up to 55 conditions per place. [2024-06-21 17:57:55,161 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 15 selfloop transitions, 5 changer transitions 14/36 dead transitions. [2024-06-21 17:57:55,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 36 transitions, 226 flow [2024-06-21 17:57:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:57:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:57:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 80 transitions. [2024-06-21 17:57:55,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3065134099616858 [2024-06-21 17:57:55,161 INFO L175 Difference]: Start difference. First operand has 56 places, 23 transitions, 127 flow. Second operand 9 states and 80 transitions. [2024-06-21 17:57:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 36 transitions, 226 flow [2024-06-21 17:57:55,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 36 transitions, 208 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:57:55,163 INFO L231 Difference]: Finished difference. Result has 52 places, 20 transitions, 103 flow [2024-06-21 17:57:55,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=103, PETRI_PLACES=52, PETRI_TRANSITIONS=20} [2024-06-21 17:57:55,163 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2024-06-21 17:57:55,163 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 20 transitions, 103 flow [2024-06-21 17:57:55,163 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 17:57:55,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:57:55,163 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 17:57:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:57:55,163 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 17:57:55,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:57:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1045879307, now seen corresponding path program 5 times [2024-06-21 17:57:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:57:55,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921659710] [2024-06-21 17:57:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:57:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:57:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:57:55,637 INFO 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 17:57:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:57:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921659710] [2024-06-21 17:57:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921659710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:57:55,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:57:55,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:57:55,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324732057] [2024-06-21 17:57:55,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:57:55,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:57:55,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:57:55,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:57:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:57:55,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 17:57:55,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 20 transitions, 103 flow. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:55,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:57:55,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 17:57:55,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:57:55,794 INFO L124 PetriNetUnfolderBase]: 22/59 cut-off events. [2024-06-21 17:57:55,795 INFO L125 PetriNetUnfolderBase]: For 219/219 co-relation queries the response was YES. [2024-06-21 17:57:55,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 59 events. 22/59 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 3 based on Foata normal form. 6/65 useless extension candidates. Maximal degree in co-relation 172. Up to 24 conditions per place. [2024-06-21 17:57:55,795 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-06-21 17:57:55,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 25 transitions, 143 flow [2024-06-21 17:57:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:57:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:57:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 64 transitions. [2024-06-21 17:57:55,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27586206896551724 [2024-06-21 17:57:55,796 INFO L175 Difference]: Start difference. First operand has 52 places, 20 transitions, 103 flow. Second operand 8 states and 64 transitions. [2024-06-21 17:57:55,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 25 transitions, 143 flow [2024-06-21 17:57:55,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 107 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-06-21 17:57:55,796 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2024-06-21 17:57:55,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2024-06-21 17:57:55,797 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2024-06-21 17:57:55,797 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2024-06-21 17:57:55,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:57:55,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 17:57:55,799 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 17:57:55,800 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 17:57:55,800 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 17:57:55,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:57:55,800 INFO L445 BasicCegarLoop]: Path program histogram: [5, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:57:55,802 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 17:57:55,802 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 17:57:55,808 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 17:57:55,808 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 17:57:55,809 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 05:57:55 BasicIcfg [2024-06-21 17:57:55,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 17:57:55,809 INFO L158 Benchmark]: Toolchain (without parser) took 28646.84ms. Allocated memory was 153.1MB in the beginning and 423.6MB in the end (delta: 270.5MB). Free memory was 124.0MB in the beginning and 217.8MB in the end (delta: -93.7MB). Peak memory consumption was 177.0MB. Max. memory is 16.1GB. [2024-06-21 17:57:55,810 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 85.8MB in the end (delta: 74.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:57:55,811 INFO L158 Benchmark]: Witness Parser took 0.20ms. Allocated memory is still 125.8MB. Free memory is still 54.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:57:55,812 INFO L158 Benchmark]: CACSL2BoogieTranslator took 530.89ms. Allocated memory is still 153.1MB. Free memory was 124.0MB in the beginning and 91.9MB in the end (delta: 32.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-21 17:57:55,812 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.64ms. Allocated memory is still 153.1MB. Free memory was 91.9MB in the beginning and 89.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:57:55,812 INFO L158 Benchmark]: Boogie Preprocessor took 54.24ms. Allocated memory is still 153.1MB. Free memory was 89.0MB in the beginning and 86.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 17:57:55,812 INFO L158 Benchmark]: RCFGBuilder took 673.82ms. Allocated memory is still 153.1MB. Free memory was 86.3MB in the beginning and 95.8MB in the end (delta: -9.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-06-21 17:57:55,813 INFO L158 Benchmark]: TraceAbstraction took 27337.40ms. Allocated memory was 153.1MB in the beginning and 423.6MB in the end (delta: 270.5MB). Free memory was 95.5MB in the beginning and 217.8MB in the end (delta: -122.2MB). Peak memory consumption was 151.4MB. Max. memory is 16.1GB. [2024-06-21 17:57:55,814 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 85.8MB in the end (delta: 74.3kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.20ms. Allocated memory is still 125.8MB. Free memory is still 54.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 530.89ms. Allocated memory is still 153.1MB. Free memory was 124.0MB in the beginning and 91.9MB in the end (delta: 32.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.64ms. Allocated memory is still 153.1MB. Free memory was 91.9MB in the beginning and 89.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.24ms. Allocated memory is still 153.1MB. Free memory was 89.0MB in the beginning and 86.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 673.82ms. Allocated memory is still 153.1MB. Free memory was 86.3MB in the beginning and 95.8MB in the end (delta: -9.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 27337.40ms. Allocated memory was 153.1MB in the beginning and 423.6MB in the end (delta: 270.5MB). Free memory was 95.5MB in the beginning and 217.8MB in the end (delta: -122.2MB). Peak memory consumption was 151.4MB. 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: 27.3s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1852 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1507 mSDsluCounter, 1514 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1279 mSDsCounter, 380 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7904 IncrementalHoareTripleChecker+Invalid, 8284 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 380 mSolverCounterUnsat, 235 mSDtfsCounter, 7904 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 7.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=639occurred in iteration=16, InterpolantAutomatonStates: 301, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 571 NumberOfCodeBlocks, 571 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 530 ConstructedInterpolants, 0 QuantifiedInterpolants, 21819 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 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 17:57:55,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE