./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix012_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix012_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix012_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix012_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:22:15,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:22:15,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:22:15,872 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:22:15,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:22:15,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:22:15,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:22:15,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:22:15,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:22:15,886 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:22:15,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:22:15,887 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:22:15,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:22:15,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:22:15,888 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:22:15,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:22:15,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:22:15,888 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:22:15,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:22:15,889 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:22:15,889 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:22:15,890 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:22:15,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:22:15,890 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:22:15,890 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:22:15,891 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:22:15,891 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:22:15,891 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:22:15,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:22:15,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:22:15,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:22:15,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:22:15,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:22:15,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:22:15,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:22:15,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:22:15,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:22:15,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:22:15,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:22:15,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:22:15,894 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:22:15,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:22:15,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:22:15,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:22:16,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:22:16,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:22:16,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:22:16,153 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:22:16,155 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:22:16,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix012_pso.opt_tso.opt.yml/witness.yml [2024-06-21 16:22:16,255 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:22:16,256 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:22:16,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix012_pso.opt_tso.opt.i [2024-06-21 16:22:17,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:22:17,583 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:22:17,583 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix012_pso.opt_tso.opt.i [2024-06-21 16:22:17,605 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbafc5011/11bb1e7cd00544b59f3bb2596bf5a084/FLAG6540ef84f [2024-06-21 16:22:17,625 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbafc5011/11bb1e7cd00544b59f3bb2596bf5a084 [2024-06-21 16:22:17,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:22:17,626 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:22:17,627 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:22:17,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:22:17,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:22:17,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:22:16" (1/2) ... [2024-06-21 16:22:17,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1fe2a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:22:17, skipping insertion in model container [2024-06-21 16:22:17,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:22:16" (1/2) ... [2024-06-21 16:22:17,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@21621fff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:22:17, skipping insertion in model container [2024-06-21 16:22:17,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:22:17" (2/2) ... [2024-06-21 16:22:17,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1fe2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:17, skipping insertion in model container [2024-06-21 16:22:17,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:22:17" (2/2) ... [2024-06-21 16:22:17,635 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:22:17,682 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:22:17,683 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:22:17,683 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:22:17,683 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:22:17,684 INFO L106 edCorrectnessWitness]: ghost_update [L822-L822] multithreaded = 1; [2024-06-21 16:22:17,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:22:17,981 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:22:17,988 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:22:18,079 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:22:18,125 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:22:18,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18 WrapperNode [2024-06-21 16:22:18,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:22:18,129 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:22:18,129 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:22:18,129 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:22:18,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,189 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-21 16:22:18,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:22:18,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:22:18,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:22:18,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:22:18,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,211 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,228 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 16:22:18,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,243 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,247 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,249 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,250 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:22:18,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:22:18,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:22:18,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:22:18,293 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (1/1) ... [2024-06-21 16:22:18,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:22:18,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:22:18,378 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 16:22:18,388 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 16:22:18,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:22:18,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:22:18,424 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:22:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:22:18,424 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:22:18,424 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:22:18,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:22:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:22:18,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:22:18,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:22:18,426 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 16:22:18,530 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:22:18,531 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:22:18,799 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:22:18,799 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:22:18,952 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:22:18,952 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:22:18,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:22:18 BoogieIcfgContainer [2024-06-21 16:22:18,953 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:22:18,956 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:22:18,956 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:22:18,958 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:22:18,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:22:16" (1/4) ... [2024-06-21 16:22:18,959 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9153c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:22:18, skipping insertion in model container [2024-06-21 16:22:18,959 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:22:17" (2/4) ... [2024-06-21 16:22:18,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9153c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:22:18, skipping insertion in model container [2024-06-21 16:22:18,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:22:18" (3/4) ... [2024-06-21 16:22:18,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9153c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:22:18, skipping insertion in model container [2024-06-21 16:22:18,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:22:18" (4/4) ... [2024-06-21 16:22:18,966 INFO L112 eAbstractionObserver]: Analyzing ICFG mix012_pso.opt_tso.opt.i [2024-06-21 16:22:18,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:22:18,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 16:22:18,979 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:22:19,046 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:22:19,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 16:22:19,104 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-21 16:22:19,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:22:19,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:22:19,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-21 16:22:19,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-21 16:22:19,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:22:19,129 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;@5aafd431, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:22:19,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 16:22:19,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:22:19,133 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:22:19,133 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:22:19,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:19,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:22:19,135 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 16:22:19,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash 353502766, now seen corresponding path program 1 times [2024-06-21 16:22:19,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:19,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588781458] [2024-06-21 16:22:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:19,857 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 16:22:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:19,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588781458] [2024-06-21 16:22:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588781458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:19,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:19,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:22:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413855339] [2024-06-21 16:22:19,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:22:19,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:22:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:22:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-21 16:22:19,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:19,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:19,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-21 16:22:19,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:20,047 INFO L124 PetriNetUnfolderBase]: 131/258 cut-off events. [2024-06-21 16:22:20,048 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 16:22:20,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 258 events. 131/258 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 960 event pairs, 75 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 503. Up to 235 conditions per place. [2024-06-21 16:22:20,053 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 20 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-21 16:22:20,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 111 flow [2024-06-21 16:22:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:22:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:22:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-06-21 16:22:20,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 16:22:20,064 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 55 transitions. [2024-06-21 16:22:20,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 111 flow [2024-06-21 16:22:20,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 16:22:20,068 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-21 16:22:20,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-21 16:22:20,073 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-21 16:22:20,073 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-21 16:22:20,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:20,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:20,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:20,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:22:20,074 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 16:22:20,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:20,075 INFO L85 PathProgramCache]: Analyzing trace with hash 414392929, now seen corresponding path program 1 times [2024-06-21 16:22:20,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:20,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944817418] [2024-06-21 16:22:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:20,519 INFO 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 16:22:20,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:20,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944817418] [2024-06-21 16:22:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944817418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:20,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:22:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355123524] [2024-06-21 16:22:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:22:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:22:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:22:20,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-21 16:22:20,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 16:22:20,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:20,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-21 16:22:20,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:20,631 INFO L124 PetriNetUnfolderBase]: 147/275 cut-off events. [2024-06-21 16:22:20,632 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-21 16:22:20,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 275 events. 147/275 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 974 event pairs, 47 based on Foata normal form. 4/279 useless extension candidates. Maximal degree in co-relation 623. Up to 244 conditions per place. [2024-06-21 16:22:20,634 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 16:22:20,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 159 flow [2024-06-21 16:22:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:22:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:22:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-21 16:22:20,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 16:22:20,636 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 69 transitions. [2024-06-21 16:22:20,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 159 flow [2024-06-21 16:22:20,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:22:20,637 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-21 16:22:20,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-21 16:22:20,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-21 16:22:20,638 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-21 16:22:20,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 16:22:20,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:20,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:20,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:22:20,639 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 16:22:20,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1444326028, now seen corresponding path program 1 times [2024-06-21 16:22:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:20,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086783374] [2024-06-21 16:22:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:21,458 INFO 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 16:22:21,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086783374] [2024-06-21 16:22:21,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086783374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:21,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:21,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:22:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650472467] [2024-06-21 16:22:21,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:21,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:22:21,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:22:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:22:21,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-21 16:22:21,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-21 16:22:21,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:21,674 INFO L124 PetriNetUnfolderBase]: 143/267 cut-off events. [2024-06-21 16:22:21,674 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-06-21 16:22:21,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 267 events. 143/267 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 928 event pairs, 25 based on Foata normal form. 4/271 useless extension candidates. Maximal degree in co-relation 671. Up to 218 conditions per place. [2024-06-21 16:22:21,676 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 29 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-06-21 16:22:21,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 204 flow [2024-06-21 16:22:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:22:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:22:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-21 16:22:21,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-21 16:22:21,678 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 6 states and 93 transitions. [2024-06-21 16:22:21,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 204 flow [2024-06-21 16:22:21,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 192 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:22:21,680 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 109 flow [2024-06-21 16:22:21,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=109, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2024-06-21 16:22:21,681 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-06-21 16:22:21,681 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 109 flow [2024-06-21 16:22:21,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:21,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:21,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:22:21,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:21,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:21,682 INFO L85 PathProgramCache]: Analyzing trace with hash -402717698, now seen corresponding path program 1 times [2024-06-21 16:22:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:21,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251621325] [2024-06-21 16:22:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:21,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:22,091 INFO 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 16:22:22,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251621325] [2024-06-21 16:22:22,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251621325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:22,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:22,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:22:22,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092659320] [2024-06-21 16:22:22,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:22,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:22:22,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:22,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:22:22,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:22:22,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-21 16:22:22,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 16:22:22,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:22,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-21 16:22:22,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:22,254 INFO L124 PetriNetUnfolderBase]: 119/237 cut-off events. [2024-06-21 16:22:22,254 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-06-21 16:22:22,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 237 events. 119/237 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 846 event pairs, 34 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 642. Up to 211 conditions per place. [2024-06-21 16:22:22,256 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 24 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2024-06-21 16:22:22,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 187 flow [2024-06-21 16:22:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:22:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:22:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-06-21 16:22:22,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-06-21 16:22:22,257 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 109 flow. Second operand 5 states and 67 transitions. [2024-06-21 16:22:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 187 flow [2024-06-21 16:22:22,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 171 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:22,259 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 120 flow [2024-06-21 16:22:22,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2024-06-21 16:22:22,260 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-06-21 16:22:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 120 flow [2024-06-21 16:22:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 16:22:22,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:22,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:22,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:22:22,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:22:22,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash 420316266, now seen corresponding path program 1 times [2024-06-21 16:22:22,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:22,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756890670] [2024-06-21 16:22:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:22,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:22,910 INFO 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 16:22:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756890670] [2024-06-21 16:22:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756890670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:22,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:22:22,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551508490] [2024-06-21 16:22:22,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:22:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:22:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:22:22,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-21 16:22:22,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 120 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:22,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:22,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-21 16:22:22,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:23,056 INFO L124 PetriNetUnfolderBase]: 115/231 cut-off events. [2024-06-21 16:22:23,072 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2024-06-21 16:22:23,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 677 conditions, 231 events. 115/231 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 814 event pairs, 32 based on Foata normal form. 2/233 useless extension candidates. Maximal degree in co-relation 658. Up to 199 conditions per place. [2024-06-21 16:22:23,075 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 26 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-21 16:22:23,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 38 transitions, 212 flow [2024-06-21 16:22:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:22:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:22:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-06-21 16:22:23,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 16:22:23,077 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 120 flow. Second operand 6 states and 79 transitions. [2024-06-21 16:22:23,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 38 transitions, 212 flow [2024-06-21 16:22:23,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 201 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:23,081 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 142 flow [2024-06-21 16:22:23,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-06-21 16:22:23,083 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-06-21 16:22:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 142 flow [2024-06-21 16:22:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:23,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:23,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:22:23,089 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 16:22:23,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash 158987699, now seen corresponding path program 1 times [2024-06-21 16:22:23,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:23,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819564848] [2024-06-21 16:22:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:23,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819564848] [2024-06-21 16:22:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819564848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:22:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027411323] [2024-06-21 16:22:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:22:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:22:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:22:23,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:23,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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 16:22:23,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:23,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:23,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:23,729 INFO L124 PetriNetUnfolderBase]: 141/267 cut-off events. [2024-06-21 16:22:23,729 INFO L125 PetriNetUnfolderBase]: For 511/511 co-relation queries the response was YES. [2024-06-21 16:22:23,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 267 events. 141/267 cut-off events. For 511/511 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 923 event pairs, 38 based on Foata normal form. 2/269 useless extension candidates. Maximal degree in co-relation 832. Up to 237 conditions per place. [2024-06-21 16:22:23,732 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 32 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-21 16:22:23,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 256 flow [2024-06-21 16:22:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:22:23,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:22:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-06-21 16:22:23,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 16:22:23,735 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 142 flow. Second operand 6 states and 77 transitions. [2024-06-21 16:22:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 256 flow [2024-06-21 16:22:23,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 239 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:23,737 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 158 flow [2024-06-21 16:22:23,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-06-21 16:22:23,739 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-06-21 16:22:23,740 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 158 flow [2024-06-21 16:22:23,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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 16:22:23,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:23,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:23,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:22:23,740 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 16:22:23,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash 144895409, now seen corresponding path program 2 times [2024-06-21 16:22:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:23,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153370522] [2024-06-21 16:22:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:23,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:24,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:24,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153370522] [2024-06-21 16:22:24,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153370522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:24,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:24,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:22:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418609365] [2024-06-21 16:22:24,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:24,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:22:24,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:22:24,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:22:24,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:24,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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 16:22:24,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:24,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:24,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:24,384 INFO L124 PetriNetUnfolderBase]: 142/272 cut-off events. [2024-06-21 16:22:24,385 INFO L125 PetriNetUnfolderBase]: For 682/684 co-relation queries the response was YES. [2024-06-21 16:22:24,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 272 events. 142/272 cut-off events. For 682/684 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 970 event pairs, 42 based on Foata normal form. 4/276 useless extension candidates. Maximal degree in co-relation 891. Up to 230 conditions per place. [2024-06-21 16:22:24,386 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 29 selfloop transitions, 11 changer transitions 0/43 dead transitions. [2024-06-21 16:22:24,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 272 flow [2024-06-21 16:22:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:22:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:22:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-06-21 16:22:24,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 16:22:24,388 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 158 flow. Second operand 6 states and 77 transitions. [2024-06-21 16:22:24,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 272 flow [2024-06-21 16:22:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 255 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:24,391 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 184 flow [2024-06-21 16:22:24,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2024-06-21 16:22:24,392 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-21 16:22:24,392 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 184 flow [2024-06-21 16:22:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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 16:22:24,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:24,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:24,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:22:24,394 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 16:22:24,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -737901277, now seen corresponding path program 1 times [2024-06-21 16:22:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:24,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739280924] [2024-06-21 16:22:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739280924] [2024-06-21 16:22:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739280924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230202526] [2024-06-21 16:22:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:25,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:25,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:25,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:25,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:25,285 INFO L124 PetriNetUnfolderBase]: 157/302 cut-off events. [2024-06-21 16:22:25,286 INFO L125 PetriNetUnfolderBase]: For 891/891 co-relation queries the response was YES. [2024-06-21 16:22:25,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 302 events. 157/302 cut-off events. For 891/891 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1129 event pairs, 38 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 1057. Up to 250 conditions per place. [2024-06-21 16:22:25,288 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 37 selfloop transitions, 16 changer transitions 0/56 dead transitions. [2024-06-21 16:22:25,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 376 flow [2024-06-21 16:22:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 16:22:25,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:22:25,289 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 184 flow. Second operand 8 states and 100 transitions. [2024-06-21 16:22:25,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 376 flow [2024-06-21 16:22:25,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 345 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:25,292 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 262 flow [2024-06-21 16:22:25,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-21 16:22:25,292 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2024-06-21 16:22:25,292 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 262 flow [2024-06-21 16:22:25,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:25,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:25,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:25,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:22:25,293 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 16:22:25,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:25,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1695715493, now seen corresponding path program 2 times [2024-06-21 16:22:25,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979573723] [2024-06-21 16:22:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:25,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:25,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979573723] [2024-06-21 16:22:25,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979573723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:25,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:25,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:25,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279942360] [2024-06-21 16:22:25,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:25,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:25,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:25,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:25,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:25,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 262 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:25,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:25,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:25,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:26,067 INFO L124 PetriNetUnfolderBase]: 155/299 cut-off events. [2024-06-21 16:22:26,068 INFO L125 PetriNetUnfolderBase]: For 1146/1146 co-relation queries the response was YES. [2024-06-21 16:22:26,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1142 conditions, 299 events. 155/299 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1134 event pairs, 37 based on Foata normal form. 1/300 useless extension candidates. Maximal degree in co-relation 1117. Up to 242 conditions per place. [2024-06-21 16:22:26,070 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 37 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2024-06-21 16:22:26,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 428 flow [2024-06-21 16:22:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 16:22:26,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 16:22:26,071 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 262 flow. Second operand 7 states and 89 transitions. [2024-06-21 16:22:26,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 428 flow [2024-06-21 16:22:26,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 400 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:26,073 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 303 flow [2024-06-21 16:22:26,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2024-06-21 16:22:26,074 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2024-06-21 16:22:26,074 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 303 flow [2024-06-21 16:22:26,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:26,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:26,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:26,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:22:26,075 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 16:22:26,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 71988667, now seen corresponding path program 1 times [2024-06-21 16:22:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:26,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147681410] [2024-06-21 16:22:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:26,672 INFO 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 16:22:26,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:26,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147681410] [2024-06-21 16:22:26,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147681410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:26,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:26,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351401811] [2024-06-21 16:22:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:26,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:26,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:26,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:26,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:26,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:26,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:26,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:26,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:26,913 INFO L124 PetriNetUnfolderBase]: 161/309 cut-off events. [2024-06-21 16:22:26,913 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2024-06-21 16:22:26,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1235 conditions, 309 events. 161/309 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1155 event pairs, 36 based on Foata normal form. 2/311 useless extension candidates. Maximal degree in co-relation 1209. Up to 262 conditions per place. [2024-06-21 16:22:26,915 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 44 selfloop transitions, 13 changer transitions 0/60 dead transitions. [2024-06-21 16:22:26,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 469 flow [2024-06-21 16:22:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 16:22:26,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:22:26,917 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 303 flow. Second operand 7 states and 88 transitions. [2024-06-21 16:22:26,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 469 flow [2024-06-21 16:22:26,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 420 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:26,920 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 310 flow [2024-06-21 16:22:26,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-06-21 16:22:26,921 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2024-06-21 16:22:26,921 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 310 flow [2024-06-21 16:22:26,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:26,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:26,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:26,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:22:26,922 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 16:22:26,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1518341987, now seen corresponding path program 2 times [2024-06-21 16:22:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:26,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56485290] [2024-06-21 16:22:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:26,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:27,583 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 16:22:27,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:27,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56485290] [2024-06-21 16:22:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56485290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053164278] [2024-06-21 16:22:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:27,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:27,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:27,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:27,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:27,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:27,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:27,786 INFO L124 PetriNetUnfolderBase]: 169/323 cut-off events. [2024-06-21 16:22:27,786 INFO L125 PetriNetUnfolderBase]: For 1528/1530 co-relation queries the response was YES. [2024-06-21 16:22:27,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1312 conditions, 323 events. 169/323 cut-off events. For 1528/1530 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1210 event pairs, 39 based on Foata normal form. 3/326 useless extension candidates. Maximal degree in co-relation 1285. Up to 252 conditions per place. [2024-06-21 16:22:27,788 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 41 selfloop transitions, 21 changer transitions 0/65 dead transitions. [2024-06-21 16:22:27,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 520 flow [2024-06-21 16:22:27,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 16:22:27,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 16:22:27,789 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 310 flow. Second operand 7 states and 89 transitions. [2024-06-21 16:22:27,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 520 flow [2024-06-21 16:22:27,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 488 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:27,792 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 381 flow [2024-06-21 16:22:27,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 16:22:27,793 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2024-06-21 16:22:27,793 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 381 flow [2024-06-21 16:22:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:27,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:27,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:27,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:22:27,794 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 16:22:27,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 196791339, now seen corresponding path program 3 times [2024-06-21 16:22:27,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:27,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383074464] [2024-06-21 16:22:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383074464] [2024-06-21 16:22:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383074464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:28,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:28,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550716895] [2024-06-21 16:22:28,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:28,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:28,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:28,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:28,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:28,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:28,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:28,745 INFO L124 PetriNetUnfolderBase]: 165/317 cut-off events. [2024-06-21 16:22:28,746 INFO L125 PetriNetUnfolderBase]: For 1871/1873 co-relation queries the response was YES. [2024-06-21 16:22:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 317 events. 165/317 cut-off events. For 1871/1873 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1206 event pairs, 39 based on Foata normal form. 4/321 useless extension candidates. Maximal degree in co-relation 1366. Up to 260 conditions per place. [2024-06-21 16:22:28,748 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 47 selfloop transitions, 16 changer transitions 0/66 dead transitions. [2024-06-21 16:22:28,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 558 flow [2024-06-21 16:22:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:28,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 16:22:28,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:22:28,749 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 381 flow. Second operand 7 states and 88 transitions. [2024-06-21 16:22:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 558 flow [2024-06-21 16:22:28,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 526 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:28,753 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 396 flow [2024-06-21 16:22:28,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-06-21 16:22:28,753 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-21 16:22:28,753 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 396 flow [2024-06-21 16:22:28,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:28,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:28,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:28,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:22:28,754 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 16:22:28,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:28,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1414838009, now seen corresponding path program 1 times [2024-06-21 16:22:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:28,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316361647] [2024-06-21 16:22:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:28,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:29,502 INFO 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 16:22:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316361647] [2024-06-21 16:22:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316361647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:29,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:29,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:29,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400792353] [2024-06-21 16:22:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:29,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:29,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:29,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 396 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:29,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:29,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:29,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:29,809 INFO L124 PetriNetUnfolderBase]: 168/323 cut-off events. [2024-06-21 16:22:29,809 INFO L125 PetriNetUnfolderBase]: For 2061/2061 co-relation queries the response was YES. [2024-06-21 16:22:29,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 323 events. 168/323 cut-off events. For 2061/2061 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1235 event pairs, 35 based on Foata normal form. 1/324 useless extension candidates. Maximal degree in co-relation 1442. Up to 259 conditions per place. [2024-06-21 16:22:29,811 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 48 selfloop transitions, 20 changer transitions 0/71 dead transitions. [2024-06-21 16:22:29,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 590 flow [2024-06-21 16:22:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 16:22:29,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 16:22:29,812 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 396 flow. Second operand 8 states and 99 transitions. [2024-06-21 16:22:29,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 590 flow [2024-06-21 16:22:29,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 556 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:29,815 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 432 flow [2024-06-21 16:22:29,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=432, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2024-06-21 16:22:29,816 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-21 16:22:29,816 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 432 flow [2024-06-21 16:22:29,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:29,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:29,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:29,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:22:29,817 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 16:22:29,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:29,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1027422045, now seen corresponding path program 2 times [2024-06-21 16:22:29,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:29,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634065985] [2024-06-21 16:22:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:29,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:30,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634065985] [2024-06-21 16:22:30,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634065985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:30,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:30,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:30,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040134046] [2024-06-21 16:22:30,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:30,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:30,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:30,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:30,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:30,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:30,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 432 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:30,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:30,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:30,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:30,894 INFO L124 PetriNetUnfolderBase]: 171/330 cut-off events. [2024-06-21 16:22:30,895 INFO L125 PetriNetUnfolderBase]: For 2483/2483 co-relation queries the response was YES. [2024-06-21 16:22:30,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563 conditions, 330 events. 171/330 cut-off events. For 2483/2483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1273 event pairs, 35 based on Foata normal form. 1/331 useless extension candidates. Maximal degree in co-relation 1531. Up to 276 conditions per place. [2024-06-21 16:22:30,897 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 54 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-06-21 16:22:30,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 636 flow [2024-06-21 16:22:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 16:22:30,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 16:22:30,898 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 432 flow. Second operand 8 states and 98 transitions. [2024-06-21 16:22:30,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 636 flow [2024-06-21 16:22:30,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 584 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:30,902 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 443 flow [2024-06-21 16:22:30,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=443, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2024-06-21 16:22:30,902 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2024-06-21 16:22:30,902 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 443 flow [2024-06-21 16:22:30,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:30,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:30,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:22:30,903 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 16:22:30,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash 846525442, now seen corresponding path program 1 times [2024-06-21 16:22:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:30,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018153623] [2024-06-21 16:22:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:30,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:31,488 INFO 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 16:22:31,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:31,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018153623] [2024-06-21 16:22:31,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018153623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:31,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:31,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:31,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516442388] [2024-06-21 16:22:31,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:31,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:31,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:31,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 443 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:31,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:31,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:31,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:31,760 INFO L124 PetriNetUnfolderBase]: 183/350 cut-off events. [2024-06-21 16:22:31,760 INFO L125 PetriNetUnfolderBase]: For 3220/3220 co-relation queries the response was YES. [2024-06-21 16:22:31,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684 conditions, 350 events. 183/350 cut-off events. For 3220/3220 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1369 event pairs, 34 based on Foata normal form. 4/354 useless extension candidates. Maximal degree in co-relation 1651. Up to 287 conditions per place. [2024-06-21 16:22:31,762 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 57 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 16:22:31,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 665 flow [2024-06-21 16:22:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 16:22:31,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:22:31,764 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 443 flow. Second operand 8 states and 100 transitions. [2024-06-21 16:22:31,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 665 flow [2024-06-21 16:22:31,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 618 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:31,767 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 472 flow [2024-06-21 16:22:31,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=472, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-06-21 16:22:31,768 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-06-21 16:22:31,768 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 472 flow [2024-06-21 16:22:31,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:31,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:31,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:22:31,769 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 16:22:31,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1805564983, now seen corresponding path program 3 times [2024-06-21 16:22:31,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:31,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235655442] [2024-06-21 16:22:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:32,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235655442] [2024-06-21 16:22:32,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235655442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:32,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:32,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:32,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436791124] [2024-06-21 16:22:32,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:32,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:32,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:32,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:32,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:32,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:32,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 472 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:32,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:32,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:32,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:32,844 INFO L124 PetriNetUnfolderBase]: 186/358 cut-off events. [2024-06-21 16:22:32,844 INFO L125 PetriNetUnfolderBase]: For 3451/3453 co-relation queries the response was YES. [2024-06-21 16:22:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 358 events. 186/358 cut-off events. For 3451/3453 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1420 event pairs, 37 based on Foata normal form. 3/361 useless extension candidates. Maximal degree in co-relation 1758. Up to 292 conditions per place. [2024-06-21 16:22:32,847 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 55 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-21 16:22:32,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 698 flow [2024-06-21 16:22:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 16:22:32,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 16:22:32,849 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 472 flow. Second operand 8 states and 98 transitions. [2024-06-21 16:22:32,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 698 flow [2024-06-21 16:22:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 644 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:32,852 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 493 flow [2024-06-21 16:22:32,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-06-21 16:22:32,853 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-06-21 16:22:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 493 flow [2024-06-21 16:22:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:32,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:32,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:22:32,854 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 16:22:32,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1589180848, now seen corresponding path program 2 times [2024-06-21 16:22:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794702577] [2024-06-21 16:22:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794702577] [2024-06-21 16:22:33,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794702577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:33,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:33,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120646762] [2024-06-21 16:22:33,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:33,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:33,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 493 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:33,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:33,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:33,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:33,857 INFO L124 PetriNetUnfolderBase]: 198/378 cut-off events. [2024-06-21 16:22:33,858 INFO L125 PetriNetUnfolderBase]: For 4352/4354 co-relation queries the response was YES. [2024-06-21 16:22:33,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 378 events. 198/378 cut-off events. For 4352/4354 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1524 event pairs, 37 based on Foata normal form. 6/384 useless extension candidates. Maximal degree in co-relation 1866. Up to 303 conditions per place. [2024-06-21 16:22:33,860 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 58 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-21 16:22:33,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 739 flow [2024-06-21 16:22:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 16:22:33,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:22:33,861 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 493 flow. Second operand 8 states and 100 transitions. [2024-06-21 16:22:33,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 739 flow [2024-06-21 16:22:33,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 680 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:33,866 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 524 flow [2024-06-21 16:22:33,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=524, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-06-21 16:22:33,866 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 47 predicate places. [2024-06-21 16:22:33,866 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 524 flow [2024-06-21 16:22:33,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:33,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:33,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:33,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:22:33,867 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 16:22:33,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:33,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1812916633, now seen corresponding path program 4 times [2024-06-21 16:22:33,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:33,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819051265] [2024-06-21 16:22:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:33,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:34,678 INFO 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 16:22:34,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:34,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819051265] [2024-06-21 16:22:34,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819051265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:34,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:34,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:34,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527758349] [2024-06-21 16:22:34,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:34,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:34,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:34,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 524 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:34,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:34,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:34,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:34,976 INFO L124 PetriNetUnfolderBase]: 196/375 cut-off events. [2024-06-21 16:22:34,977 INFO L125 PetriNetUnfolderBase]: For 4302/4304 co-relation queries the response was YES. [2024-06-21 16:22:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 375 events. 196/375 cut-off events. For 4302/4304 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1504 event pairs, 37 based on Foata normal form. 3/378 useless extension candidates. Maximal degree in co-relation 1890. Up to 291 conditions per place. [2024-06-21 16:22:34,979 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 51 selfloop transitions, 26 changer transitions 0/80 dead transitions. [2024-06-21 16:22:34,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 754 flow [2024-06-21 16:22:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 16:22:34,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 16:22:34,981 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 524 flow. Second operand 8 states and 98 transitions. [2024-06-21 16:22:34,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 754 flow [2024-06-21 16:22:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 686 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:34,985 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 553 flow [2024-06-21 16:22:34,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=553, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2024-06-21 16:22:34,986 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-21 16:22:34,987 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 553 flow [2024-06-21 16:22:34,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:34,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:34,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:34,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:22:34,987 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 16:22:34,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:34,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1812916850, now seen corresponding path program 3 times [2024-06-21 16:22:34,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:34,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687151904] [2024-06-21 16:22:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:34,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:35,685 INFO 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 16:22:35,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687151904] [2024-06-21 16:22:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687151904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:35,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:35,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:35,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801658341] [2024-06-21 16:22:35,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:35,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:35,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:35,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:35,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:35,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:35,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 553 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:35,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:35,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:35,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:35,920 INFO L124 PetriNetUnfolderBase]: 202/385 cut-off events. [2024-06-21 16:22:35,921 INFO L125 PetriNetUnfolderBase]: For 4699/4701 co-relation queries the response was YES. [2024-06-21 16:22:35,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 385 events. 202/385 cut-off events. For 4699/4701 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1539 event pairs, 36 based on Foata normal form. 4/389 useless extension candidates. Maximal degree in co-relation 1930. Up to 263 conditions per place. [2024-06-21 16:22:35,923 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 54 selfloop transitions, 31 changer transitions 0/88 dead transitions. [2024-06-21 16:22:35,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 88 transitions, 849 flow [2024-06-21 16:22:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 16:22:35,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 16:22:35,925 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 553 flow. Second operand 8 states and 104 transitions. [2024-06-21 16:22:35,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 88 transitions, 849 flow [2024-06-21 16:22:35,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 768 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:35,935 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 595 flow [2024-06-21 16:22:35,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=595, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2024-06-21 16:22:35,935 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-21 16:22:35,935 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 595 flow [2024-06-21 16:22:35,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:35,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:35,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:35,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:22:35,936 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 16:22:35,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1813183760, now seen corresponding path program 4 times [2024-06-21 16:22:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:35,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45309779] [2024-06-21 16:22:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:35,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:36,633 INFO 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 16:22:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:36,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45309779] [2024-06-21 16:22:36,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45309779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:36,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:36,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:36,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200127517] [2024-06-21 16:22:36,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:36,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:36,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:36,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:36,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 595 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:36,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:36,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:36,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:36,943 INFO L124 PetriNetUnfolderBase]: 198/377 cut-off events. [2024-06-21 16:22:36,943 INFO L125 PetriNetUnfolderBase]: For 4784/4786 co-relation queries the response was YES. [2024-06-21 16:22:36,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 377 events. 198/377 cut-off events. For 4784/4786 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1498 event pairs, 36 based on Foata normal form. 2/379 useless extension candidates. Maximal degree in co-relation 1926. Up to 330 conditions per place. [2024-06-21 16:22:36,946 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 69 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-06-21 16:22:36,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 781 flow [2024-06-21 16:22:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 16:22:36,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:22:36,948 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 595 flow. Second operand 8 states and 95 transitions. [2024-06-21 16:22:36,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 781 flow [2024-06-21 16:22:36,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 715 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:36,959 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 558 flow [2024-06-21 16:22:36,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=558, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2024-06-21 16:22:36,959 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-06-21 16:22:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 558 flow [2024-06-21 16:22:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:36,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:36,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:36,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:22:36,960 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 16:22:36,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1813193680, now seen corresponding path program 1 times [2024-06-21 16:22:36,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:36,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026853435] [2024-06-21 16:22:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026853435] [2024-06-21 16:22:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026853435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029471519] [2024-06-21 16:22:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:38,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:38,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:38,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 558 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:38,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:38,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:38,296 INFO L124 PetriNetUnfolderBase]: 195/372 cut-off events. [2024-06-21 16:22:38,296 INFO L125 PetriNetUnfolderBase]: For 4681/4683 co-relation queries the response was YES. [2024-06-21 16:22:38,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 372 events. 195/372 cut-off events. For 4681/4683 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1468 event pairs, 35 based on Foata normal form. 2/374 useless extension candidates. Maximal degree in co-relation 1853. Up to 327 conditions per place. [2024-06-21 16:22:38,300 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 70 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-21 16:22:38,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 86 transitions, 761 flow [2024-06-21 16:22:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 16:22:38,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-21 16:22:38,301 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 558 flow. Second operand 9 states and 102 transitions. [2024-06-21 16:22:38,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 86 transitions, 761 flow [2024-06-21 16:22:38,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 713 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:38,309 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 558 flow [2024-06-21 16:22:38,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=558, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2024-06-21 16:22:38,309 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-21 16:22:38,310 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 558 flow [2024-06-21 16:22:38,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:38,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:38,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:38,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:22:38,311 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 16:22:38,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1903637406, now seen corresponding path program 1 times [2024-06-21 16:22:38,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:38,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69258266] [2024-06-21 16:22:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:38,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:38,875 INFO 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 16:22:38,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:38,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69258266] [2024-06-21 16:22:38,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69258266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:38,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:38,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:38,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107973490] [2024-06-21 16:22:38,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:38,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:38,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:38,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:38,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:38,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:38,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:38,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:38,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:38,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:39,165 INFO L124 PetriNetUnfolderBase]: 199/381 cut-off events. [2024-06-21 16:22:39,166 INFO L125 PetriNetUnfolderBase]: For 5007/5007 co-relation queries the response was YES. [2024-06-21 16:22:39,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1954 conditions, 381 events. 199/381 cut-off events. For 5007/5007 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1524 event pairs, 13 based on Foata normal form. 2/383 useless extension candidates. Maximal degree in co-relation 1911. Up to 294 conditions per place. [2024-06-21 16:22:39,168 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 73 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-06-21 16:22:39,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 788 flow [2024-06-21 16:22:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 16:22:39,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 16:22:39,170 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 558 flow. Second operand 8 states and 98 transitions. [2024-06-21 16:22:39,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 788 flow [2024-06-21 16:22:39,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 760 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:39,176 INFO L231 Difference]: Finished difference. Result has 90 places, 77 transitions, 578 flow [2024-06-21 16:22:39,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=578, PETRI_PLACES=90, PETRI_TRANSITIONS=77} [2024-06-21 16:22:39,177 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2024-06-21 16:22:39,177 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 77 transitions, 578 flow [2024-06-21 16:22:39,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:39,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:39,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:39,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:22:39,178 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 16:22:39,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1750094172, now seen corresponding path program 2 times [2024-06-21 16:22:39,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:39,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957270734] [2024-06-21 16:22:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:39,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:39,765 INFO 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 16:22:39,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957270734] [2024-06-21 16:22:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957270734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:39,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:39,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:39,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241864232] [2024-06-21 16:22:39,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:39,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:39,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 77 transitions, 578 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:39,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:39,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:39,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:40,062 INFO L124 PetriNetUnfolderBase]: 203/389 cut-off events. [2024-06-21 16:22:40,062 INFO L125 PetriNetUnfolderBase]: For 5489/5489 co-relation queries the response was YES. [2024-06-21 16:22:40,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2028 conditions, 389 events. 203/389 cut-off events. For 5489/5489 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1581 event pairs, 30 based on Foata normal form. 2/391 useless extension candidates. Maximal degree in co-relation 1984. Up to 318 conditions per place. [2024-06-21 16:22:40,065 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 70 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2024-06-21 16:22:40,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 808 flow [2024-06-21 16:22:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 16:22:40,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 16:22:40,067 INFO L175 Difference]: Start difference. First operand has 90 places, 77 transitions, 578 flow. Second operand 8 states and 99 transitions. [2024-06-21 16:22:40,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 808 flow [2024-06-21 16:22:40,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 770 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:40,076 INFO L231 Difference]: Finished difference. Result has 92 places, 78 transitions, 597 flow [2024-06-21 16:22:40,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=597, PETRI_PLACES=92, PETRI_TRANSITIONS=78} [2024-06-21 16:22:40,076 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 16:22:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 78 transitions, 597 flow [2024-06-21 16:22:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:40,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:22:40,077 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 16:22:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1900775486, now seen corresponding path program 1 times [2024-06-21 16:22:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001629821] [2024-06-21 16:22:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:40,865 INFO 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 16:22:40,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001629821] [2024-06-21 16:22:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001629821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:40,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:40,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221209490] [2024-06-21 16:22:40,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:40,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:40,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:40,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:40,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:40,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:40,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 78 transitions, 597 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:40,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:40,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:40,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:41,226 INFO L124 PetriNetUnfolderBase]: 206/394 cut-off events. [2024-06-21 16:22:41,226 INFO L125 PetriNetUnfolderBase]: For 5810/5810 co-relation queries the response was YES. [2024-06-21 16:22:41,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2085 conditions, 394 events. 206/394 cut-off events. For 5810/5810 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1598 event pairs, 29 based on Foata normal form. 1/395 useless extension candidates. Maximal degree in co-relation 2040. Up to 323 conditions per place. [2024-06-21 16:22:41,228 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 69 selfloop transitions, 22 changer transitions 0/94 dead transitions. [2024-06-21 16:22:41,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 94 transitions, 849 flow [2024-06-21 16:22:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:22:41,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-21 16:22:41,230 INFO L175 Difference]: Start difference. First operand has 92 places, 78 transitions, 597 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:22:41,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 94 transitions, 849 flow [2024-06-21 16:22:41,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 804 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:41,238 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 635 flow [2024-06-21 16:22:41,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=635, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2024-06-21 16:22:41,238 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-21 16:22:41,238 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 635 flow [2024-06-21 16:22:41,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:41,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:41,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:41,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:22:41,239 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 16:22:41,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1785489276, now seen corresponding path program 3 times [2024-06-21 16:22:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:41,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787902964] [2024-06-21 16:22:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:41,823 INFO 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 16:22:41,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:41,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787902964] [2024-06-21 16:22:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787902964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:41,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251735598] [2024-06-21 16:22:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:41,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:41,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:41,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:41,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 635 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:41,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:41,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:41,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:42,130 INFO L124 PetriNetUnfolderBase]: 210/402 cut-off events. [2024-06-21 16:22:42,131 INFO L125 PetriNetUnfolderBase]: For 6531/6531 co-relation queries the response was YES. [2024-06-21 16:22:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2169 conditions, 402 events. 210/402 cut-off events. For 6531/6531 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1649 event pairs, 29 based on Foata normal form. 2/404 useless extension candidates. Maximal degree in co-relation 2123. Up to 349 conditions per place. [2024-06-21 16:22:42,133 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 79 selfloop transitions, 13 changer transitions 0/95 dead transitions. [2024-06-21 16:22:42,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 95 transitions, 892 flow [2024-06-21 16:22:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 16:22:42,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:22:42,135 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 635 flow. Second operand 8 states and 96 transitions. [2024-06-21 16:22:42,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 95 transitions, 892 flow [2024-06-21 16:22:42,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 95 transitions, 825 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:42,144 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 645 flow [2024-06-21 16:22:42,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=645, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2024-06-21 16:22:42,144 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-06-21 16:22:42,144 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 645 flow [2024-06-21 16:22:42,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:42,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:42,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:22:42,145 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 16:22:42,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:42,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1785311336, now seen corresponding path program 2 times [2024-06-21 16:22:42,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782556470] [2024-06-21 16:22:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:43,115 INFO 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 16:22:43,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782556470] [2024-06-21 16:22:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782556470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:43,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:43,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:43,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508371981] [2024-06-21 16:22:43,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:43,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:43,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 645 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:43,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:43,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:43,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:43,526 INFO L124 PetriNetUnfolderBase]: 228/437 cut-off events. [2024-06-21 16:22:43,526 INFO L125 PetriNetUnfolderBase]: For 8188/8188 co-relation queries the response was YES. [2024-06-21 16:22:43,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 437 events. 228/437 cut-off events. For 8188/8188 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1854 event pairs, 29 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2431. Up to 345 conditions per place. [2024-06-21 16:22:43,530 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 77 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-21 16:22:43,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 105 transitions, 1105 flow [2024-06-21 16:22:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 16:22:43,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 16:22:43,532 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 645 flow. Second operand 9 states and 114 transitions. [2024-06-21 16:22:43,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 105 transitions, 1105 flow [2024-06-21 16:22:43,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 105 transitions, 1055 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:43,543 INFO L231 Difference]: Finished difference. Result has 102 places, 90 transitions, 781 flow [2024-06-21 16:22:43,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=781, PETRI_PLACES=102, PETRI_TRANSITIONS=90} [2024-06-21 16:22:43,545 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-21 16:22:43,546 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 90 transitions, 781 flow [2024-06-21 16:22:43,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:43,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:43,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:43,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:22:43,546 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 16:22:43,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 472485696, now seen corresponding path program 3 times [2024-06-21 16:22:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:43,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884522720] [2024-06-21 16:22:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884522720] [2024-06-21 16:22:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884522720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:44,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:44,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:44,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532723789] [2024-06-21 16:22:44,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:44,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:44,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:44,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:44,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:44,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:44,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 90 transitions, 781 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:44,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:44,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:44,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:44,945 INFO L124 PetriNetUnfolderBase]: 224/431 cut-off events. [2024-06-21 16:22:44,945 INFO L125 PetriNetUnfolderBase]: For 8535/8535 co-relation queries the response was YES. [2024-06-21 16:22:44,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 431 events. 224/431 cut-off events. For 8535/8535 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1824 event pairs, 29 based on Foata normal form. 2/433 useless extension candidates. Maximal degree in co-relation 2433. Up to 342 conditions per place. [2024-06-21 16:22:44,948 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 77 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-21 16:22:44,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 1079 flow [2024-06-21 16:22:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 16:22:44,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-21 16:22:44,950 INFO L175 Difference]: Start difference. First operand has 102 places, 90 transitions, 781 flow. Second operand 9 states and 112 transitions. [2024-06-21 16:22:44,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 104 transitions, 1079 flow [2024-06-21 16:22:44,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 104 transitions, 998 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:44,961 INFO L231 Difference]: Finished difference. Result has 107 places, 90 transitions, 754 flow [2024-06-21 16:22:44,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=754, PETRI_PLACES=107, PETRI_TRANSITIONS=90} [2024-06-21 16:22:44,961 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2024-06-21 16:22:44,961 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 90 transitions, 754 flow [2024-06-21 16:22:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:44,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:44,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:44,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:22:44,962 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 16:22:44,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash 137762672, now seen corresponding path program 4 times [2024-06-21 16:22:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:44,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691591476] [2024-06-21 16:22:44,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:44,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:45,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:45,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691591476] [2024-06-21 16:22:45,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691591476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:45,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:45,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:45,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911852545] [2024-06-21 16:22:45,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:45,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:45,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:45,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:45,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:45,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 90 transitions, 754 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:45,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:45,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:45,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:45,940 INFO L124 PetriNetUnfolderBase]: 221/427 cut-off events. [2024-06-21 16:22:45,940 INFO L125 PetriNetUnfolderBase]: For 7954/7956 co-relation queries the response was YES. [2024-06-21 16:22:45,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 427 events. 221/427 cut-off events. For 7954/7956 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1815 event pairs, 31 based on Foata normal form. 4/431 useless extension candidates. Maximal degree in co-relation 2349. Up to 358 conditions per place. [2024-06-21 16:22:45,944 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 82 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2024-06-21 16:22:45,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 102 transitions, 1007 flow [2024-06-21 16:22:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 16:22:45,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:22:45,946 INFO L175 Difference]: Start difference. First operand has 107 places, 90 transitions, 754 flow. Second operand 8 states and 96 transitions. [2024-06-21 16:22:45,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 102 transitions, 1007 flow [2024-06-21 16:22:45,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 102 transitions, 961 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:45,956 INFO L231 Difference]: Finished difference. Result has 109 places, 92 transitions, 778 flow [2024-06-21 16:22:45,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=778, PETRI_PLACES=109, PETRI_TRANSITIONS=92} [2024-06-21 16:22:45,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2024-06-21 16:22:45,958 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 92 transitions, 778 flow [2024-06-21 16:22:45,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:45,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:45,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:45,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:22:45,958 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 16:22:45,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash 934361350, now seen corresponding path program 4 times [2024-06-21 16:22:45,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:45,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607729597] [2024-06-21 16:22:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:45,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:46,846 INFO 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 16:22:46,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:46,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607729597] [2024-06-21 16:22:46,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607729597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:46,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:46,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077177882] [2024-06-21 16:22:46,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:46,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:46,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:46,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 92 transitions, 778 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:46,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:46,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:46,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:47,140 INFO L124 PetriNetUnfolderBase]: 237/457 cut-off events. [2024-06-21 16:22:47,140 INFO L125 PetriNetUnfolderBase]: For 9939/9941 co-relation queries the response was YES. [2024-06-21 16:22:47,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2701 conditions, 457 events. 237/457 cut-off events. For 9939/9941 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1983 event pairs, 31 based on Foata normal form. 4/461 useless extension candidates. Maximal degree in co-relation 2647. Up to 352 conditions per place. [2024-06-21 16:22:47,143 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 79 selfloop transitions, 27 changer transitions 0/109 dead transitions. [2024-06-21 16:22:47,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 1178 flow [2024-06-21 16:22:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 16:22:47,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-21 16:22:47,157 INFO L175 Difference]: Start difference. First operand has 109 places, 92 transitions, 778 flow. Second operand 9 states and 112 transitions. [2024-06-21 16:22:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 1178 flow [2024-06-21 16:22:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 109 transitions, 1098 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:47,171 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 858 flow [2024-06-21 16:22:47,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=858, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-06-21 16:22:47,173 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2024-06-21 16:22:47,173 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 858 flow [2024-06-21 16:22:47,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:47,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:47,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:47,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:22:47,174 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 16:22:47,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:47,174 INFO L85 PathProgramCache]: Analyzing trace with hash 366078912, now seen corresponding path program 5 times [2024-06-21 16:22:47,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019410324] [2024-06-21 16:22:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:47,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:48,124 INFO 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 16:22:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019410324] [2024-06-21 16:22:48,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019410324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:48,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:48,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576272114] [2024-06-21 16:22:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:48,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:48,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:48,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 858 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:48,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:48,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:48,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:48,527 INFO L124 PetriNetUnfolderBase]: 248/477 cut-off events. [2024-06-21 16:22:48,528 INFO L125 PetriNetUnfolderBase]: For 11658/11660 co-relation queries the response was YES. [2024-06-21 16:22:48,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 477 events. 248/477 cut-off events. For 11658/11660 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2096 event pairs, 32 based on Foata normal form. 2/479 useless extension candidates. Maximal degree in co-relation 2905. Up to 406 conditions per place. [2024-06-21 16:22:48,531 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 92 selfloop transitions, 18 changer transitions 0/113 dead transitions. [2024-06-21 16:22:48,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 113 transitions, 1274 flow [2024-06-21 16:22:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 16:22:48,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:22:48,542 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 858 flow. Second operand 9 states and 108 transitions. [2024-06-21 16:22:48,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 113 transitions, 1274 flow [2024-06-21 16:22:48,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 113 transitions, 1196 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:48,557 INFO L231 Difference]: Finished difference. Result has 116 places, 102 transitions, 932 flow [2024-06-21 16:22:48,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=932, PETRI_PLACES=116, PETRI_TRANSITIONS=102} [2024-06-21 16:22:48,557 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2024-06-21 16:22:48,557 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 102 transitions, 932 flow [2024-06-21 16:22:48,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:48,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:48,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:48,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:22:48,558 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 16:22:48,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 365848272, now seen corresponding path program 6 times [2024-06-21 16:22:48,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:48,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553584512] [2024-06-21 16:22:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:49,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:49,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553584512] [2024-06-21 16:22:49,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553584512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:49,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:49,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:49,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127483411] [2024-06-21 16:22:49,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:49,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:49,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:49,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 102 transitions, 932 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:49,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:49,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:49,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:49,690 INFO L124 PetriNetUnfolderBase]: 251/484 cut-off events. [2024-06-21 16:22:49,691 INFO L125 PetriNetUnfolderBase]: For 11797/11799 co-relation queries the response was YES. [2024-06-21 16:22:49,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3031 conditions, 484 events. 251/484 cut-off events. For 11797/11799 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2151 event pairs, 31 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 2974. Up to 342 conditions per place. [2024-06-21 16:22:49,694 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 85 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-21 16:22:49,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 130 transitions, 1579 flow [2024-06-21 16:22:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 16:22:49,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 16:22:49,701 INFO L175 Difference]: Start difference. First operand has 116 places, 102 transitions, 932 flow. Second operand 9 states and 114 transitions. [2024-06-21 16:22:49,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 130 transitions, 1579 flow [2024-06-21 16:22:49,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 130 transitions, 1472 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:49,719 INFO L231 Difference]: Finished difference. Result has 123 places, 115 transitions, 1185 flow [2024-06-21 16:22:49,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1185, PETRI_PLACES=123, PETRI_TRANSITIONS=115} [2024-06-21 16:22:49,720 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2024-06-21 16:22:49,720 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 115 transitions, 1185 flow [2024-06-21 16:22:49,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:49,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:49,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:22:49,721 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 16:22:49,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash 137940612, now seen corresponding path program 7 times [2024-06-21 16:22:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116791801] [2024-06-21 16:22:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:50,521 INFO 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 16:22:50,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:50,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116791801] [2024-06-21 16:22:50,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116791801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:50,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:50,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:50,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185561085] [2024-06-21 16:22:50,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:50,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:50,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:50,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:50,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:50,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:50,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 115 transitions, 1185 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:50,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:50,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:50,780 INFO L124 PetriNetUnfolderBase]: 249/481 cut-off events. [2024-06-21 16:22:50,780 INFO L125 PetriNetUnfolderBase]: For 11746/11748 co-relation queries the response was YES. [2024-06-21 16:22:50,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 481 events. 249/481 cut-off events. For 11746/11748 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2135 event pairs, 31 based on Foata normal form. 3/484 useless extension candidates. Maximal degree in co-relation 3030. Up to 374 conditions per place. [2024-06-21 16:22:50,787 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 94 selfloop transitions, 31 changer transitions 0/128 dead transitions. [2024-06-21 16:22:50,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 128 transitions, 1559 flow [2024-06-21 16:22:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 16:22:50,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-21 16:22:50,788 INFO L175 Difference]: Start difference. First operand has 123 places, 115 transitions, 1185 flow. Second operand 9 states and 113 transitions. [2024-06-21 16:22:50,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 128 transitions, 1559 flow [2024-06-21 16:22:50,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 1447 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:50,810 INFO L231 Difference]: Finished difference. Result has 129 places, 116 transitions, 1163 flow [2024-06-21 16:22:50,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1163, PETRI_PLACES=129, PETRI_TRANSITIONS=116} [2024-06-21 16:22:50,811 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2024-06-21 16:22:50,811 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 116 transitions, 1163 flow [2024-06-21 16:22:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:50,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:50,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:50,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:22:50,812 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 16:22:50,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 365841762, now seen corresponding path program 8 times [2024-06-21 16:22:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:50,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787728064] [2024-06-21 16:22:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:50,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:51,878 INFO 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 16:22:51,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:51,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787728064] [2024-06-21 16:22:51,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787728064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:51,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:51,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:51,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796699741] [2024-06-21 16:22:51,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:51,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:51,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:51,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:51,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 116 transitions, 1163 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:51,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:51,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:51,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:52,236 INFO L124 PetriNetUnfolderBase]: 257/496 cut-off events. [2024-06-21 16:22:52,237 INFO L125 PetriNetUnfolderBase]: For 12790/12792 co-relation queries the response was YES. [2024-06-21 16:22:52,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3254 conditions, 496 events. 257/496 cut-off events. For 12790/12792 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2208 event pairs, 31 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 3190. Up to 296 conditions per place. [2024-06-21 16:22:52,241 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 69 selfloop transitions, 62 changer transitions 0/134 dead transitions. [2024-06-21 16:22:52,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 134 transitions, 1762 flow [2024-06-21 16:22:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 16:22:52,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-21 16:22:52,242 INFO L175 Difference]: Start difference. First operand has 129 places, 116 transitions, 1163 flow. Second operand 9 states and 118 transitions. [2024-06-21 16:22:52,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 134 transitions, 1762 flow [2024-06-21 16:22:52,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 134 transitions, 1657 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:52,265 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 1310 flow [2024-06-21 16:22:52,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1310, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2024-06-21 16:22:52,266 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2024-06-21 16:22:52,266 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 1310 flow [2024-06-21 16:22:52,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:52,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:52,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:22:52,266 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 16:22:52,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash -736197354, now seen corresponding path program 1 times [2024-06-21 16:22:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838112569] [2024-06-21 16:22:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:52,981 INFO 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 16:22:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838112569] [2024-06-21 16:22:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838112569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:52,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:52,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:52,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606061244] [2024-06-21 16:22:52,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:52,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:52,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:53,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:53,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 1310 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:53,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:53,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:53,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:53,352 INFO L124 PetriNetUnfolderBase]: 261/503 cut-off events. [2024-06-21 16:22:53,353 INFO L125 PetriNetUnfolderBase]: For 14224/14224 co-relation queries the response was YES. [2024-06-21 16:22:53,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 503 events. 261/503 cut-off events. For 14224/14224 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2250 event pairs, 10 based on Foata normal form. 2/505 useless extension candidates. Maximal degree in co-relation 3297. Up to 392 conditions per place. [2024-06-21 16:22:53,356 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 119 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-21 16:22:53,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 139 transitions, 1642 flow [2024-06-21 16:22:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 16:22:53,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:22:53,357 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 1310 flow. Second operand 9 states and 108 transitions. [2024-06-21 16:22:53,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 139 transitions, 1642 flow [2024-06-21 16:22:53,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 139 transitions, 1522 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:53,379 INFO L231 Difference]: Finished difference. Result has 135 places, 122 transitions, 1244 flow [2024-06-21 16:22:53,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1244, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2024-06-21 16:22:53,380 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2024-06-21 16:22:53,380 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 1244 flow [2024-06-21 16:22:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:53,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:53,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:53,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:22:53,381 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 16:22:53,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:53,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1817440706, now seen corresponding path program 2 times [2024-06-21 16:22:53,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:53,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401113678] [2024-06-21 16:22:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:53,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:54,338 INFO 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 16:22:54,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401113678] [2024-06-21 16:22:54,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401113678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:54,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:54,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392660483] [2024-06-21 16:22:54,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:54,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:54,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:54,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:54,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 1244 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:54,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:54,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:54,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:54,741 INFO L124 PetriNetUnfolderBase]: 265/511 cut-off events. [2024-06-21 16:22:54,742 INFO L125 PetriNetUnfolderBase]: For 14086/14086 co-relation queries the response was YES. [2024-06-21 16:22:54,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 511 events. 265/511 cut-off events. For 14086/14086 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2311 event pairs, 28 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 3225. Up to 421 conditions per place. [2024-06-21 16:22:54,745 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 114 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2024-06-21 16:22:54,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 138 transitions, 1572 flow [2024-06-21 16:22:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:22:54,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-21 16:22:54,746 INFO L175 Difference]: Start difference. First operand has 135 places, 122 transitions, 1244 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:22:54,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 138 transitions, 1572 flow [2024-06-21 16:22:54,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 138 transitions, 1528 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:54,769 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 1264 flow [2024-06-21 16:22:54,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1264, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2024-06-21 16:22:54,770 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2024-06-21 16:22:54,770 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 1264 flow [2024-06-21 16:22:54,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:54,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:54,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:22:54,771 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 16:22:54,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1118657464, now seen corresponding path program 3 times [2024-06-21 16:22:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:54,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971143000] [2024-06-21 16:22:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:55,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:55,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971143000] [2024-06-21 16:22:55,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971143000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:55,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:55,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:55,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29074835] [2024-06-21 16:22:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:55,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:55,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:55,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 1264 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:55,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:55,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:55,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:55,759 INFO L124 PetriNetUnfolderBase]: 269/519 cut-off events. [2024-06-21 16:22:55,759 INFO L125 PetriNetUnfolderBase]: For 15189/15189 co-relation queries the response was YES. [2024-06-21 16:22:55,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3353 conditions, 519 events. 269/519 cut-off events. For 15189/15189 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2363 event pairs, 26 based on Foata normal form. 2/521 useless extension candidates. Maximal degree in co-relation 3287. Up to 424 conditions per place. [2024-06-21 16:22:55,762 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 117 selfloop transitions, 20 changer transitions 0/140 dead transitions. [2024-06-21 16:22:55,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 140 transitions, 1600 flow [2024-06-21 16:22:55,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 16:22:55,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-06-21 16:22:55,763 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 1264 flow. Second operand 9 states and 109 transitions. [2024-06-21 16:22:55,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 140 transitions, 1600 flow [2024-06-21 16:22:55,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 140 transitions, 1546 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:55,790 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 1274 flow [2024-06-21 16:22:55,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1274, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2024-06-21 16:22:55,790 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2024-06-21 16:22:55,790 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 1274 flow [2024-06-21 16:22:55,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:55,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:55,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:55,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:22:55,791 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 16:22:55,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:55,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1205503096, now seen corresponding path program 1 times [2024-06-21 16:22:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334289284] [2024-06-21 16:22:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:56,863 INFO 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 16:22:56,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:56,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334289284] [2024-06-21 16:22:56,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334289284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:56,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:56,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:56,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257493665] [2024-06-21 16:22:56,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:56,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:56,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:56,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:56,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 1274 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:56,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:56,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:56,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:57,233 INFO L124 PetriNetUnfolderBase]: 267/516 cut-off events. [2024-06-21 16:22:57,233 INFO L125 PetriNetUnfolderBase]: For 14659/14659 co-relation queries the response was YES. [2024-06-21 16:22:57,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 516 events. 267/516 cut-off events. For 14659/14659 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2360 event pairs, 27 based on Foata normal form. 1/517 useless extension candidates. Maximal degree in co-relation 3231. Up to 426 conditions per place. [2024-06-21 16:22:57,236 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 114 selfloop transitions, 24 changer transitions 0/141 dead transitions. [2024-06-21 16:22:57,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 141 transitions, 1634 flow [2024-06-21 16:22:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:22:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:22:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:22:57,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-21 16:22:57,251 INFO L175 Difference]: Start difference. First operand has 139 places, 124 transitions, 1274 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:22:57,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 141 transitions, 1634 flow [2024-06-21 16:22:57,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 141 transitions, 1580 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:57,278 INFO L231 Difference]: Finished difference. Result has 142 places, 126 transitions, 1319 flow [2024-06-21 16:22:57,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1319, PETRI_PLACES=142, PETRI_TRANSITIONS=126} [2024-06-21 16:22:57,279 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2024-06-21 16:22:57,279 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 126 transitions, 1319 flow [2024-06-21 16:22:57,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:57,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:57,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:57,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:22:57,280 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 16:22:57,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash 484411968, now seen corresponding path program 4 times [2024-06-21 16:22:57,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:57,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118545432] [2024-06-21 16:22:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:57,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:58,079 INFO 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 16:22:58,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:58,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118545432] [2024-06-21 16:22:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118545432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:58,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683860565] [2024-06-21 16:22:58,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:58,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:58,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:58,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:58,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 126 transitions, 1319 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:58,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:58,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:58,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:58,353 INFO L124 PetriNetUnfolderBase]: 271/524 cut-off events. [2024-06-21 16:22:58,353 INFO L125 PetriNetUnfolderBase]: For 15959/15959 co-relation queries the response was YES. [2024-06-21 16:22:58,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 524 events. 271/524 cut-off events. For 15959/15959 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2407 event pairs, 29 based on Foata normal form. 2/526 useless extension candidates. Maximal degree in co-relation 3294. Up to 452 conditions per place. [2024-06-21 16:22:58,356 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 123 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2024-06-21 16:22:58,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 141 transitions, 1660 flow [2024-06-21 16:22:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 16:22:58,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-21 16:22:58,357 INFO L175 Difference]: Start difference. First operand has 142 places, 126 transitions, 1319 flow. Second operand 9 states and 106 transitions. [2024-06-21 16:22:58,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 141 transitions, 1660 flow [2024-06-21 16:22:58,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 141 transitions, 1577 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:58,385 INFO L231 Difference]: Finished difference. Result has 144 places, 128 transitions, 1306 flow [2024-06-21 16:22:58,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1306, PETRI_PLACES=144, PETRI_TRANSITIONS=128} [2024-06-21 16:22:58,386 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2024-06-21 16:22:58,386 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 128 transitions, 1306 flow [2024-06-21 16:22:58,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:58,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:58,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:58,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:22:58,386 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 16:22:58,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 639221914, now seen corresponding path program 5 times [2024-06-21 16:22:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:58,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278852997] [2024-06-21 16:22:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:59,399 INFO 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 16:22:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:59,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278852997] [2024-06-21 16:22:59,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278852997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:59,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:59,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538164665] [2024-06-21 16:22:59,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:59,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:59,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:22:59,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 128 transitions, 1306 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:59,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:59,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:22:59,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:59,779 INFO L124 PetriNetUnfolderBase]: 275/531 cut-off events. [2024-06-21 16:22:59,779 INFO L125 PetriNetUnfolderBase]: For 16907/16909 co-relation queries the response was YES. [2024-06-21 16:22:59,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 531 events. 275/531 cut-off events. For 16907/16909 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2451 event pairs, 29 based on Foata normal form. 2/533 useless extension candidates. Maximal degree in co-relation 3327. Up to 431 conditions per place. [2024-06-21 16:22:59,783 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 117 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-21 16:22:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 142 transitions, 1638 flow [2024-06-21 16:22:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 16:22:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:22:59,784 INFO L175 Difference]: Start difference. First operand has 144 places, 128 transitions, 1306 flow. Second operand 9 states and 108 transitions. [2024-06-21 16:22:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 142 transitions, 1638 flow [2024-06-21 16:22:59,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 142 transitions, 1595 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:59,816 INFO L231 Difference]: Finished difference. Result has 147 places, 129 transitions, 1335 flow [2024-06-21 16:22:59,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1335, PETRI_PLACES=147, PETRI_TRANSITIONS=129} [2024-06-21 16:22:59,818 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2024-06-21 16:22:59,818 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 129 transitions, 1335 flow [2024-06-21 16:22:59,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:59,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:59,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:22:59,819 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 16:22:59,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash 489918498, now seen corresponding path program 6 times [2024-06-21 16:22:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:59,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434631252] [2024-06-21 16:22:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:00,754 INFO 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 16:23:00,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:00,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434631252] [2024-06-21 16:23:00,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434631252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:00,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:00,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:00,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166338385] [2024-06-21 16:23:00,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:00,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:00,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:00,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:00,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 129 transitions, 1335 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:00,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:00,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:00,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:01,156 INFO L124 PetriNetUnfolderBase]: 279/540 cut-off events. [2024-06-21 16:23:01,156 INFO L125 PetriNetUnfolderBase]: For 17882/17882 co-relation queries the response was YES. [2024-06-21 16:23:01,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3473 conditions, 540 events. 279/540 cut-off events. For 17882/17882 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2531 event pairs, 29 based on Foata normal form. 2/542 useless extension candidates. Maximal degree in co-relation 3402. Up to 462 conditions per place. [2024-06-21 16:23:01,160 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 122 selfloop transitions, 18 changer transitions 0/143 dead transitions. [2024-06-21 16:23:01,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 143 transitions, 1675 flow [2024-06-21 16:23:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 16:23:01,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:23:01,161 INFO L175 Difference]: Start difference. First operand has 147 places, 129 transitions, 1335 flow. Second operand 9 states and 108 transitions. [2024-06-21 16:23:01,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 143 transitions, 1675 flow [2024-06-21 16:23:01,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 143 transitions, 1613 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:01,194 INFO L231 Difference]: Finished difference. Result has 149 places, 130 transitions, 1339 flow [2024-06-21 16:23:01,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1339, PETRI_PLACES=149, PETRI_TRANSITIONS=130} [2024-06-21 16:23:01,195 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2024-06-21 16:23:01,195 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 130 transitions, 1339 flow [2024-06-21 16:23:01,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:01,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:01,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:23:01,195 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 16:23:01,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash 644939926, now seen corresponding path program 2 times [2024-06-21 16:23:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35062464] [2024-06-21 16:23:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:02,134 INFO 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 16:23:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35062464] [2024-06-21 16:23:02,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35062464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:02,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:02,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026843103] [2024-06-21 16:23:02,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:02,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:02,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:02,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 130 transitions, 1339 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:02,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:02,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:02,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:02,491 INFO L124 PetriNetUnfolderBase]: 282/545 cut-off events. [2024-06-21 16:23:02,491 INFO L125 PetriNetUnfolderBase]: For 17949/17949 co-relation queries the response was YES. [2024-06-21 16:23:02,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 545 events. 282/545 cut-off events. For 17949/17949 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2564 event pairs, 29 based on Foata normal form. 1/546 useless extension candidates. Maximal degree in co-relation 3430. Up to 445 conditions per place. [2024-06-21 16:23:02,495 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 115 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-06-21 16:23:02,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 146 transitions, 1796 flow [2024-06-21 16:23:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 16:23:02,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-06-21 16:23:02,504 INFO L175 Difference]: Start difference. First operand has 149 places, 130 transitions, 1339 flow. Second operand 9 states and 112 transitions. [2024-06-21 16:23:02,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 146 transitions, 1796 flow [2024-06-21 16:23:02,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 146 transitions, 1740 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:02,537 INFO L231 Difference]: Finished difference. Result has 151 places, 132 transitions, 1389 flow [2024-06-21 16:23:02,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1389, PETRI_PLACES=151, PETRI_TRANSITIONS=132} [2024-06-21 16:23:02,538 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-21 16:23:02,538 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 132 transitions, 1389 flow [2024-06-21 16:23:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:02,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:02,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:02,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:23:02,539 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:02,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 756038904, now seen corresponding path program 3 times [2024-06-21 16:23:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637439986] [2024-06-21 16:23:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:02,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:03,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:03,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637439986] [2024-06-21 16:23:03,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637439986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:03,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:03,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126044308] [2024-06-21 16:23:03,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:03,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:03,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:03,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 132 transitions, 1389 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:03,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:03,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:03,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:04,277 INFO L124 PetriNetUnfolderBase]: 280/542 cut-off events. [2024-06-21 16:23:04,278 INFO L125 PetriNetUnfolderBase]: For 17807/17807 co-relation queries the response was YES. [2024-06-21 16:23:04,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3448 conditions, 542 events. 280/542 cut-off events. For 17807/17807 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2549 event pairs, 29 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 3375. Up to 443 conditions per place. [2024-06-21 16:23:04,281 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 114 selfloop transitions, 29 changer transitions 0/146 dead transitions. [2024-06-21 16:23:04,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 146 transitions, 1726 flow [2024-06-21 16:23:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:23:04,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-21 16:23:04,284 INFO L175 Difference]: Start difference. First operand has 151 places, 132 transitions, 1389 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:23:04,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 146 transitions, 1726 flow [2024-06-21 16:23:04,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 146 transitions, 1621 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:04,318 INFO L231 Difference]: Finished difference. Result has 154 places, 132 transitions, 1347 flow [2024-06-21 16:23:04,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1347, PETRI_PLACES=154, PETRI_TRANSITIONS=132} [2024-06-21 16:23:04,319 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2024-06-21 16:23:04,320 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 132 transitions, 1347 flow [2024-06-21 16:23:04,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:04,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:04,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:04,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:23:04,322 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:04,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash 490133979, now seen corresponding path program 1 times [2024-06-21 16:23:04,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:04,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138863651] [2024-06-21 16:23:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:04,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:05,068 INFO 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 16:23:05,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:05,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138863651] [2024-06-21 16:23:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138863651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:05,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:05,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137431919] [2024-06-21 16:23:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:05,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:05,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:05,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:05,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 132 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:05,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:05,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:05,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:05,426 INFO L124 PetriNetUnfolderBase]: 300/586 cut-off events. [2024-06-21 16:23:05,427 INFO L125 PetriNetUnfolderBase]: For 26249/26249 co-relation queries the response was YES. [2024-06-21 16:23:05,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3634 conditions, 586 events. 300/586 cut-off events. For 26249/26249 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2820 event pairs, 33 based on Foata normal form. 12/598 useless extension candidates. Maximal degree in co-relation 3561. Up to 457 conditions per place. [2024-06-21 16:23:05,431 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 124 selfloop transitions, 17 changer transitions 7/151 dead transitions. [2024-06-21 16:23:05,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 151 transitions, 1778 flow [2024-06-21 16:23:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 16:23:05,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-21 16:23:05,445 INFO L175 Difference]: Start difference. First operand has 154 places, 132 transitions, 1347 flow. Second operand 9 states and 114 transitions. [2024-06-21 16:23:05,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 151 transitions, 1778 flow [2024-06-21 16:23:05,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 1704 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:05,480 INFO L231 Difference]: Finished difference. Result has 154 places, 130 transitions, 1303 flow [2024-06-21 16:23:05,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1303, PETRI_PLACES=154, PETRI_TRANSITIONS=130} [2024-06-21 16:23:05,482 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2024-06-21 16:23:05,482 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 130 transitions, 1303 flow [2024-06-21 16:23:05,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:05,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:05,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:05,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:23:05,483 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:05,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:05,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1329764356, now seen corresponding path program 7 times [2024-06-21 16:23:05,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:05,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372836433] [2024-06-21 16:23:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:05,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:06,311 INFO 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 16:23:06,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:06,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372836433] [2024-06-21 16:23:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372836433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:06,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:06,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:06,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551865357] [2024-06-21 16:23:06,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:06,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:06,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 130 transitions, 1303 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:06,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:06,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:06,635 INFO L124 PetriNetUnfolderBase]: 280/547 cut-off events. [2024-06-21 16:23:06,635 INFO L125 PetriNetUnfolderBase]: For 19490/19492 co-relation queries the response was YES. [2024-06-21 16:23:06,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3438 conditions, 547 events. 280/547 cut-off events. For 19490/19492 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2593 event pairs, 32 based on Foata normal form. 4/551 useless extension candidates. Maximal degree in co-relation 3364. Up to 459 conditions per place. [2024-06-21 16:23:06,639 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 118 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2024-06-21 16:23:06,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 142 transitions, 1637 flow [2024-06-21 16:23:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 16:23:06,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:23:06,649 INFO L175 Difference]: Start difference. First operand has 154 places, 130 transitions, 1303 flow. Second operand 9 states and 108 transitions. [2024-06-21 16:23:06,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 142 transitions, 1637 flow [2024-06-21 16:23:06,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 142 transitions, 1585 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:06,683 INFO L231 Difference]: Finished difference. Result has 156 places, 131 transitions, 1325 flow [2024-06-21 16:23:06,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=156, PETRI_TRANSITIONS=131} [2024-06-21 16:23:06,684 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2024-06-21 16:23:06,684 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 131 transitions, 1325 flow [2024-06-21 16:23:06,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:06,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:06,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:06,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:23:06,685 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:06,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash -24175638, now seen corresponding path program 8 times [2024-06-21 16:23:06,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:06,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497547455] [2024-06-21 16:23:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:06,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:07,673 INFO 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 16:23:07,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:07,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497547455] [2024-06-21 16:23:07,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497547455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:07,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:07,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146501492] [2024-06-21 16:23:07,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:07,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:07,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:07,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:07,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:07,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 131 transitions, 1325 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:07,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:07,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:07,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:07,976 INFO L124 PetriNetUnfolderBase]: 284/555 cut-off events. [2024-06-21 16:23:07,976 INFO L125 PetriNetUnfolderBase]: For 20416/20418 co-relation queries the response was YES. [2024-06-21 16:23:07,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 555 events. 284/555 cut-off events. For 20416/20418 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2652 event pairs, 34 based on Foata normal form. 4/559 useless extension candidates. Maximal degree in co-relation 3427. Up to 473 conditions per place. [2024-06-21 16:23:07,980 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 122 selfloop transitions, 19 changer transitions 0/144 dead transitions. [2024-06-21 16:23:07,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 144 transitions, 1676 flow [2024-06-21 16:23:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 16:23:07,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-21 16:23:07,982 INFO L175 Difference]: Start difference. First operand has 156 places, 131 transitions, 1325 flow. Second operand 9 states and 106 transitions. [2024-06-21 16:23:07,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 144 transitions, 1676 flow [2024-06-21 16:23:08,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 144 transitions, 1610 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:08,019 INFO L231 Difference]: Finished difference. Result has 159 places, 133 transitions, 1347 flow [2024-06-21 16:23:08,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=159, PETRI_TRANSITIONS=133} [2024-06-21 16:23:08,020 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2024-06-21 16:23:08,020 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 133 transitions, 1347 flow [2024-06-21 16:23:08,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:08,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:08,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:23:08,021 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:08,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1105286216, now seen corresponding path program 9 times [2024-06-21 16:23:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:08,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769115933] [2024-06-21 16:23:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:08,803 INFO 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 16:23:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769115933] [2024-06-21 16:23:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769115933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:08,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:08,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:08,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840798632] [2024-06-21 16:23:08,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:08,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:08,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:08,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 133 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:08,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:08,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:08,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:09,152 INFO L124 PetriNetUnfolderBase]: 288/563 cut-off events. [2024-06-21 16:23:09,152 INFO L125 PetriNetUnfolderBase]: For 21405/21407 co-relation queries the response was YES. [2024-06-21 16:23:09,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3558 conditions, 563 events. 288/563 cut-off events. For 21405/21407 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2690 event pairs, 32 based on Foata normal form. 4/567 useless extension candidates. Maximal degree in co-relation 3481. Up to 476 conditions per place. [2024-06-21 16:23:09,157 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 125 selfloop transitions, 18 changer transitions 0/146 dead transitions. [2024-06-21 16:23:09,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 146 transitions, 1695 flow [2024-06-21 16:23:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 16:23:09,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-21 16:23:09,185 INFO L175 Difference]: Start difference. First operand has 159 places, 133 transitions, 1347 flow. Second operand 9 states and 106 transitions. [2024-06-21 16:23:09,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 146 transitions, 1695 flow [2024-06-21 16:23:09,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 146 transitions, 1636 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:09,224 INFO L231 Difference]: Finished difference. Result has 162 places, 134 transitions, 1360 flow [2024-06-21 16:23:09,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1360, PETRI_PLACES=162, PETRI_TRANSITIONS=134} [2024-06-21 16:23:09,225 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-21 16:23:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 134 transitions, 1360 flow [2024-06-21 16:23:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:09,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:09,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:09,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:23:09,225 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:09,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:09,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1670192388, now seen corresponding path program 10 times [2024-06-21 16:23:09,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:09,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784284615] [2024-06-21 16:23:09,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:09,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:10,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784284615] [2024-06-21 16:23:10,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784284615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:10,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:10,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:10,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438463050] [2024-06-21 16:23:10,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:10,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:10,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:10,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:10,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 134 transitions, 1360 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:10,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:10,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:10,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:10,593 INFO L124 PetriNetUnfolderBase]: 285/558 cut-off events. [2024-06-21 16:23:10,593 INFO L125 PetriNetUnfolderBase]: For 20064/20066 co-relation queries the response was YES. [2024-06-21 16:23:10,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3411 conditions, 558 events. 285/558 cut-off events. For 20064/20066 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2678 event pairs, 33 based on Foata normal form. 4/562 useless extension candidates. Maximal degree in co-relation 3333. Up to 452 conditions per place. [2024-06-21 16:23:10,597 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 112 selfloop transitions, 30 changer transitions 0/145 dead transitions. [2024-06-21 16:23:10,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 145 transitions, 1674 flow [2024-06-21 16:23:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 16:23:10,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:23:10,598 INFO L175 Difference]: Start difference. First operand has 162 places, 134 transitions, 1360 flow. Second operand 9 states and 108 transitions. [2024-06-21 16:23:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 145 transitions, 1674 flow [2024-06-21 16:23:10,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 145 transitions, 1612 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:10,637 INFO L231 Difference]: Finished difference. Result has 164 places, 134 transitions, 1362 flow [2024-06-21 16:23:10,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1362, PETRI_PLACES=164, PETRI_TRANSITIONS=134} [2024-06-21 16:23:10,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 135 predicate places. [2024-06-21 16:23:10,638 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 134 transitions, 1362 flow [2024-06-21 16:23:10,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:10,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:10,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:10,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:23:10,639 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:10,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -18597777, now seen corresponding path program 2 times [2024-06-21 16:23:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:10,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813143972] [2024-06-21 16:23:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:11,629 INFO 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 16:23:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813143972] [2024-06-21 16:23:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813143972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:11,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:11,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670548511] [2024-06-21 16:23:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:11,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:11,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 134 transitions, 1362 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:11,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:11,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:11,978 INFO L124 PetriNetUnfolderBase]: 305/602 cut-off events. [2024-06-21 16:23:11,979 INFO L125 PetriNetUnfolderBase]: For 30642/30644 co-relation queries the response was YES. [2024-06-21 16:23:11,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3642 conditions, 602 events. 305/602 cut-off events. For 30642/30644 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2935 event pairs, 37 based on Foata normal form. 14/616 useless extension candidates. Maximal degree in co-relation 3563. Up to 463 conditions per place. [2024-06-21 16:23:11,982 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 120 selfloop transitions, 23 changer transitions 7/153 dead transitions. [2024-06-21 16:23:11,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 153 transitions, 1804 flow [2024-06-21 16:23:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:23:11,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-06-21 16:23:11,984 INFO L175 Difference]: Start difference. First operand has 164 places, 134 transitions, 1362 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:23:11,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 153 transitions, 1804 flow [2024-06-21 16:23:12,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 153 transitions, 1671 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:12,029 INFO L231 Difference]: Finished difference. Result has 166 places, 134 transitions, 1304 flow [2024-06-21 16:23:12,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1304, PETRI_PLACES=166, PETRI_TRANSITIONS=134} [2024-06-21 16:23:12,029 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 137 predicate places. [2024-06-21 16:23:12,029 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 134 transitions, 1304 flow [2024-06-21 16:23:12,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:12,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:12,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:12,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:23:12,030 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:12,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:12,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1099770014, now seen corresponding path program 4 times [2024-06-21 16:23:12,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:12,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224183620] [2024-06-21 16:23:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:12,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:13,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:13,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224183620] [2024-06-21 16:23:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224183620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:13,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:13,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:13,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139084054] [2024-06-21 16:23:13,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:13,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:13,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:13,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:13,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:13,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 134 transitions, 1304 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:13,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:13,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:13,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:13,736 INFO L124 PetriNetUnfolderBase]: 284/559 cut-off events. [2024-06-21 16:23:13,736 INFO L125 PetriNetUnfolderBase]: For 20227/20229 co-relation queries the response was YES. [2024-06-21 16:23:13,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 559 events. 284/559 cut-off events. For 20227/20229 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2679 event pairs, 33 based on Foata normal form. 3/562 useless extension candidates. Maximal degree in co-relation 3257. Up to 465 conditions per place. [2024-06-21 16:23:13,740 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 117 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 16:23:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 147 transitions, 1666 flow [2024-06-21 16:23:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:23:13,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:23:13,741 INFO L175 Difference]: Start difference. First operand has 166 places, 134 transitions, 1304 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:23:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 147 transitions, 1666 flow [2024-06-21 16:23:13,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 147 transitions, 1592 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:13,786 INFO L231 Difference]: Finished difference. Result has 169 places, 136 transitions, 1337 flow [2024-06-21 16:23:13,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1337, PETRI_PLACES=169, PETRI_TRANSITIONS=136} [2024-06-21 16:23:13,787 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2024-06-21 16:23:13,787 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 136 transitions, 1337 flow [2024-06-21 16:23:13,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:13,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:13,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:23:13,787 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:13,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1523709718, now seen corresponding path program 5 times [2024-06-21 16:23:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:13,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559220377] [2024-06-21 16:23:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:13,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:15,228 INFO 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 16:23:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559220377] [2024-06-21 16:23:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559220377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:15,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:15,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:15,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256893698] [2024-06-21 16:23:15,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:15,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:15,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:15,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:15,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:15,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:15,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 136 transitions, 1337 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:15,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:15,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:15,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:15,745 INFO L124 PetriNetUnfolderBase]: 287/564 cut-off events. [2024-06-21 16:23:15,745 INFO L125 PetriNetUnfolderBase]: For 20961/20963 co-relation queries the response was YES. [2024-06-21 16:23:15,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 564 events. 287/564 cut-off events. For 20961/20963 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2727 event pairs, 33 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3291. Up to 425 conditions per place. [2024-06-21 16:23:15,749 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 102 selfloop transitions, 46 changer transitions 0/151 dead transitions. [2024-06-21 16:23:15,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 151 transitions, 1731 flow [2024-06-21 16:23:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:15,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:23:15,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-21 16:23:15,750 INFO L175 Difference]: Start difference. First operand has 169 places, 136 transitions, 1337 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:23:15,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 151 transitions, 1731 flow [2024-06-21 16:23:15,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 151 transitions, 1652 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:15,792 INFO L231 Difference]: Finished difference. Result has 173 places, 139 transitions, 1425 flow [2024-06-21 16:23:15,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1425, PETRI_PLACES=173, PETRI_TRANSITIONS=139} [2024-06-21 16:23:15,793 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2024-06-21 16:23:15,793 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 139 transitions, 1425 flow [2024-06-21 16:23:15,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:15,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:15,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:15,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:23:15,793 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:15,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1329972118, now seen corresponding path program 6 times [2024-06-21 16:23:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:15,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087098841] [2024-06-21 16:23:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:15,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:17,337 INFO 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 16:23:17,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:17,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087098841] [2024-06-21 16:23:17,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087098841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:17,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:17,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053032436] [2024-06-21 16:23:17,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:17,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:17,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:17,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:17,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:17,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:17,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 139 transitions, 1425 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:17,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:17,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:17,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:17,761 INFO L124 PetriNetUnfolderBase]: 285/560 cut-off events. [2024-06-21 16:23:17,761 INFO L125 PetriNetUnfolderBase]: For 20598/20600 co-relation queries the response was YES. [2024-06-21 16:23:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3346 conditions, 560 events. 285/560 cut-off events. For 20598/20600 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2683 event pairs, 38 based on Foata normal form. 1/560 useless extension candidates. Maximal degree in co-relation 3263. Up to 443 conditions per place. [2024-06-21 16:23:17,764 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 111 selfloop transitions, 35 changer transitions 0/149 dead transitions. [2024-06-21 16:23:17,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 149 transitions, 1741 flow [2024-06-21 16:23:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:23:17,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:23:17,765 INFO L175 Difference]: Start difference. First operand has 173 places, 139 transitions, 1425 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:23:17,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 149 transitions, 1741 flow [2024-06-21 16:23:17,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 149 transitions, 1600 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:17,809 INFO L231 Difference]: Finished difference. Result has 177 places, 139 transitions, 1359 flow [2024-06-21 16:23:17,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1359, PETRI_PLACES=177, PETRI_TRANSITIONS=139} [2024-06-21 16:23:17,809 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 148 predicate places. [2024-06-21 16:23:17,809 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 139 transitions, 1359 flow [2024-06-21 16:23:17,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:17,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:23:17,810 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:17,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1936105149, now seen corresponding path program 3 times [2024-06-21 16:23:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358751594] [2024-06-21 16:23:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:18,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:18,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358751594] [2024-06-21 16:23:18,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358751594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:18,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:18,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:23:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089442521] [2024-06-21 16:23:18,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:23:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:23:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:23:18,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:18,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 139 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:18,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:18,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:18,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:18,861 INFO L124 PetriNetUnfolderBase]: 289/567 cut-off events. [2024-06-21 16:23:18,861 INFO L125 PetriNetUnfolderBase]: For 22353/22355 co-relation queries the response was YES. [2024-06-21 16:23:18,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3352 conditions, 567 events. 289/567 cut-off events. For 22353/22355 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2730 event pairs, 35 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 3268. Up to 498 conditions per place. [2024-06-21 16:23:18,865 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 132 selfloop transitions, 15 changer transitions 0/150 dead transitions. [2024-06-21 16:23:18,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 150 transitions, 1703 flow [2024-06-21 16:23:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 16:23:18,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:23:18,866 INFO L175 Difference]: Start difference. First operand has 177 places, 139 transitions, 1359 flow. Second operand 9 states and 105 transitions. [2024-06-21 16:23:18,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 150 transitions, 1703 flow [2024-06-21 16:23:18,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 150 transitions, 1597 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:18,910 INFO L231 Difference]: Finished difference. Result has 176 places, 140 transitions, 1315 flow [2024-06-21 16:23:18,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1315, PETRI_PLACES=176, PETRI_TRANSITIONS=140} [2024-06-21 16:23:18,911 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2024-06-21 16:23:18,911 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 140 transitions, 1315 flow [2024-06-21 16:23:18,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:18,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:18,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:18,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:23:18,912 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:18,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1277573009, now seen corresponding path program 4 times [2024-06-21 16:23:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:18,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182720918] [2024-06-21 16:23:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:18,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:20,082 INFO 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 16:23:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182720918] [2024-06-21 16:23:20,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182720918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:20,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:20,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079745948] [2024-06-21 16:23:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:20,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:20,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:20,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:20,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 140 transitions, 1315 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:20,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:20,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:20,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:20,506 INFO L124 PetriNetUnfolderBase]: 293/575 cut-off events. [2024-06-21 16:23:20,506 INFO L125 PetriNetUnfolderBase]: For 23452/23454 co-relation queries the response was YES. [2024-06-21 16:23:20,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3380 conditions, 575 events. 293/575 cut-off events. For 23452/23454 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2785 event pairs, 33 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 3295. Up to 492 conditions per place. [2024-06-21 16:23:20,511 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 133 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2024-06-21 16:23:20,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 154 transitions, 1675 flow [2024-06-21 16:23:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 16:23:20,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-06-21 16:23:20,512 INFO L175 Difference]: Start difference. First operand has 176 places, 140 transitions, 1315 flow. Second operand 11 states and 124 transitions. [2024-06-21 16:23:20,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 154 transitions, 1675 flow [2024-06-21 16:23:20,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 154 transitions, 1623 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:20,564 INFO L231 Difference]: Finished difference. Result has 180 places, 141 transitions, 1333 flow [2024-06-21 16:23:20,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1333, PETRI_PLACES=180, PETRI_TRANSITIONS=141} [2024-06-21 16:23:20,565 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2024-06-21 16:23:20,565 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 141 transitions, 1333 flow [2024-06-21 16:23:20,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:20,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:20,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:20,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:23:20,566 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:20,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1287103928, now seen corresponding path program 7 times [2024-06-21 16:23:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:20,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885661442] [2024-06-21 16:23:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:21,787 INFO 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 16:23:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885661442] [2024-06-21 16:23:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885661442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:21,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:21,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747874468] [2024-06-21 16:23:21,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:21,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:21,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:21,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 141 transitions, 1333 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:21,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:21,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:21,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:22,216 INFO L124 PetriNetUnfolderBase]: 291/572 cut-off events. [2024-06-21 16:23:22,217 INFO L125 PetriNetUnfolderBase]: For 21493/21495 co-relation queries the response was YES. [2024-06-21 16:23:22,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 572 events. 291/572 cut-off events. For 21493/21495 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2777 event pairs, 35 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 3207. Up to 511 conditions per place. [2024-06-21 16:23:22,221 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 132 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-21 16:23:22,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 151 transitions, 1653 flow [2024-06-21 16:23:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:23:22,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-21 16:23:22,222 INFO L175 Difference]: Start difference. First operand has 180 places, 141 transitions, 1333 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:23:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 151 transitions, 1653 flow [2024-06-21 16:23:22,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 151 transitions, 1562 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:22,275 INFO L231 Difference]: Finished difference. Result has 182 places, 141 transitions, 1279 flow [2024-06-21 16:23:22,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1279, PETRI_PLACES=182, PETRI_TRANSITIONS=141} [2024-06-21 16:23:22,276 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 153 predicate places. [2024-06-21 16:23:22,276 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 141 transitions, 1279 flow [2024-06-21 16:23:22,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:22,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:22,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:22,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:23:22,277 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:22,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1523911528, now seen corresponding path program 8 times [2024-06-21 16:23:22,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:22,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594204094] [2024-06-21 16:23:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:22,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:23,664 INFO 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 16:23:23,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:23,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594204094] [2024-06-21 16:23:23,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594204094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:23,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:23,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814865075] [2024-06-21 16:23:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:23,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:23,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:23,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:23,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:23,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 141 transitions, 1279 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:23,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:23,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:23,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:24,117 INFO L124 PetriNetUnfolderBase]: 287/567 cut-off events. [2024-06-21 16:23:24,117 INFO L125 PetriNetUnfolderBase]: For 20451/20453 co-relation queries the response was YES. [2024-06-21 16:23:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 567 events. 287/567 cut-off events. For 20451/20453 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2739 event pairs, 40 based on Foata normal form. 2/568 useless extension candidates. Maximal degree in co-relation 2973. Up to 347 conditions per place. [2024-06-21 16:23:24,121 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 75 selfloop transitions, 73 changer transitions 0/151 dead transitions. [2024-06-21 16:23:24,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 151 transitions, 1599 flow [2024-06-21 16:23:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 16:23:24,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-06-21 16:23:24,122 INFO L175 Difference]: Start difference. First operand has 182 places, 141 transitions, 1279 flow. Second operand 10 states and 128 transitions. [2024-06-21 16:23:24,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 151 transitions, 1599 flow [2024-06-21 16:23:24,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 151 transitions, 1488 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:24,168 INFO L231 Difference]: Finished difference. Result has 183 places, 141 transitions, 1327 flow [2024-06-21 16:23:24,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1327, PETRI_PLACES=183, PETRI_TRANSITIONS=141} [2024-06-21 16:23:24,168 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2024-06-21 16:23:24,168 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 141 transitions, 1327 flow [2024-06-21 16:23:24,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:24,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:24,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:23:24,169 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:24,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1670407869, now seen corresponding path program 5 times [2024-06-21 16:23:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:24,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576466199] [2024-06-21 16:23:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:24,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:25,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:25,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576466199] [2024-06-21 16:23:25,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576466199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262428463] [2024-06-21 16:23:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:25,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:25,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 141 transitions, 1327 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:25,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:25,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:25,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:25,485 INFO L124 PetriNetUnfolderBase]: 284/563 cut-off events. [2024-06-21 16:23:25,486 INFO L125 PetriNetUnfolderBase]: For 18757/18759 co-relation queries the response was YES. [2024-06-21 16:23:25,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2996 conditions, 563 events. 284/563 cut-off events. For 18757/18759 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2728 event pairs, 34 based on Foata normal form. 4/567 useless extension candidates. Maximal degree in co-relation 2908. Up to 448 conditions per place. [2024-06-21 16:23:25,489 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 117 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-21 16:23:25,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 154 transitions, 1672 flow [2024-06-21 16:23:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:23:25,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:23:25,491 INFO L175 Difference]: Start difference. First operand has 183 places, 141 transitions, 1327 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:23:25,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 154 transitions, 1672 flow [2024-06-21 16:23:25,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 154 transitions, 1444 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-21 16:23:25,532 INFO L231 Difference]: Finished difference. Result has 182 places, 142 transitions, 1200 flow [2024-06-21 16:23:25,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1200, PETRI_PLACES=182, PETRI_TRANSITIONS=142} [2024-06-21 16:23:25,533 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 153 predicate places. [2024-06-21 16:23:25,533 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 142 transitions, 1200 flow [2024-06-21 16:23:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:25,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:25,533 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 16:23:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:23:25,533 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:25,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:25,534 INFO L85 PathProgramCache]: Analyzing trace with hash 175724481, now seen corresponding path program 1 times [2024-06-21 16:23:25,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:25,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381750863] [2024-06-21 16:23:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:26,514 INFO 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 16:23:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:26,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381750863] [2024-06-21 16:23:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381750863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:26,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651424302] [2024-06-21 16:23:26,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:26,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:26,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:26,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 142 transitions, 1200 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:26,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:26,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:26,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:26,859 INFO L124 PetriNetUnfolderBase]: 309/617 cut-off events. [2024-06-21 16:23:26,859 INFO L125 PetriNetUnfolderBase]: For 26672/26674 co-relation queries the response was YES. [2024-06-21 16:23:26,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 617 events. 309/617 cut-off events. For 26672/26674 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3068 event pairs, 35 based on Foata normal form. 10/627 useless extension candidates. Maximal degree in co-relation 2919. Up to 488 conditions per place. [2024-06-21 16:23:26,864 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 134 selfloop transitions, 15 changer transitions 16/168 dead transitions. [2024-06-21 16:23:26,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 168 transitions, 1642 flow [2024-06-21 16:23:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:23:26,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 16:23:26,865 INFO L175 Difference]: Start difference. First operand has 182 places, 142 transitions, 1200 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:23:26,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 168 transitions, 1642 flow [2024-06-21 16:23:26,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 168 transitions, 1513 flow, removed 19 selfloop flow, removed 13 redundant places. [2024-06-21 16:23:26,903 INFO L231 Difference]: Finished difference. Result has 186 places, 145 transitions, 1155 flow [2024-06-21 16:23:26,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1155, PETRI_PLACES=186, PETRI_TRANSITIONS=145} [2024-06-21 16:23:26,903 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-21 16:23:26,903 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 145 transitions, 1155 flow [2024-06-21 16:23:26,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:26,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:26,904 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 16:23:26,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:23:26,904 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:26,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:26,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2082902451, now seen corresponding path program 2 times [2024-06-21 16:23:26,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:26,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781327464] [2024-06-21 16:23:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:26,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:27,765 INFO 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 16:23:27,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:27,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781327464] [2024-06-21 16:23:27,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781327464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:27,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:27,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147134857] [2024-06-21 16:23:27,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:27,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:27,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:27,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:27,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 145 transitions, 1155 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:27,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:27,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:27,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:28,138 INFO L124 PetriNetUnfolderBase]: 306/616 cut-off events. [2024-06-21 16:23:28,138 INFO L125 PetriNetUnfolderBase]: For 27589/27589 co-relation queries the response was YES. [2024-06-21 16:23:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2923 conditions, 616 events. 306/616 cut-off events. For 27589/27589 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3091 event pairs, 51 based on Foata normal form. 8/624 useless extension candidates. Maximal degree in co-relation 2834. Up to 485 conditions per place. [2024-06-21 16:23:28,143 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 137 selfloop transitions, 16 changer transitions 16/172 dead transitions. [2024-06-21 16:23:28,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 172 transitions, 1599 flow [2024-06-21 16:23:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:23:28,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-21 16:23:28,144 INFO L175 Difference]: Start difference. First operand has 186 places, 145 transitions, 1155 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:23:28,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 172 transitions, 1599 flow [2024-06-21 16:23:28,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 172 transitions, 1556 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:28,181 INFO L231 Difference]: Finished difference. Result has 190 places, 145 transitions, 1168 flow [2024-06-21 16:23:28,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1168, PETRI_PLACES=190, PETRI_TRANSITIONS=145} [2024-06-21 16:23:28,184 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2024-06-21 16:23:28,184 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 145 transitions, 1168 flow [2024-06-21 16:23:28,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:28,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:28,185 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 16:23:28,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:23:28,185 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:28,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash -921245121, now seen corresponding path program 3 times [2024-06-21 16:23:28,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:28,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573461891] [2024-06-21 16:23:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:28,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:28,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:28,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573461891] [2024-06-21 16:23:28,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573461891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:28,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:28,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:28,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131867567] [2024-06-21 16:23:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:28,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:28,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:28,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:29,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 145 transitions, 1168 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:29,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:29,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:29,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:29,312 INFO L124 PetriNetUnfolderBase]: 306/614 cut-off events. [2024-06-21 16:23:29,313 INFO L125 PetriNetUnfolderBase]: For 31025/31025 co-relation queries the response was YES. [2024-06-21 16:23:29,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2965 conditions, 614 events. 306/614 cut-off events. For 31025/31025 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3087 event pairs, 54 based on Foata normal form. 10/624 useless extension candidates. Maximal degree in co-relation 2875. Up to 487 conditions per place. [2024-06-21 16:23:29,317 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 139 selfloop transitions, 19 changer transitions 12/173 dead transitions. [2024-06-21 16:23:29,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 173 transitions, 1651 flow [2024-06-21 16:23:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:23:29,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-21 16:23:29,318 INFO L175 Difference]: Start difference. First operand has 190 places, 145 transitions, 1168 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:23:29,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 173 transitions, 1651 flow [2024-06-21 16:23:29,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 173 transitions, 1613 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:29,360 INFO L231 Difference]: Finished difference. Result has 191 places, 148 transitions, 1209 flow [2024-06-21 16:23:29,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1209, PETRI_PLACES=191, PETRI_TRANSITIONS=148} [2024-06-21 16:23:29,360 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2024-06-21 16:23:29,361 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 148 transitions, 1209 flow [2024-06-21 16:23:29,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:29,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:29,361 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 16:23:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:23:29,361 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:29,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash -238930161, now seen corresponding path program 4 times [2024-06-21 16:23:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:29,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902375039] [2024-06-21 16:23:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:29,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:30,254 INFO 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 16:23:30,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:30,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902375039] [2024-06-21 16:23:30,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902375039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:30,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:30,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835827437] [2024-06-21 16:23:30,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:30,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:30,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 148 transitions, 1209 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:30,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:30,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:30,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:30,567 INFO L124 PetriNetUnfolderBase]: 298/602 cut-off events. [2024-06-21 16:23:30,567 INFO L125 PetriNetUnfolderBase]: For 27118/27118 co-relation queries the response was YES. [2024-06-21 16:23:30,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2886 conditions, 602 events. 298/602 cut-off events. For 27118/27118 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3009 event pairs, 49 based on Foata normal form. 8/610 useless extension candidates. Maximal degree in co-relation 2796. Up to 485 conditions per place. [2024-06-21 16:23:30,571 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 138 selfloop transitions, 17 changer transitions 11/169 dead transitions. [2024-06-21 16:23:30,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 169 transitions, 1614 flow [2024-06-21 16:23:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:23:30,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 16:23:30,574 INFO L175 Difference]: Start difference. First operand has 191 places, 148 transitions, 1209 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:23:30,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 169 transitions, 1614 flow [2024-06-21 16:23:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 169 transitions, 1569 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:30,615 INFO L231 Difference]: Finished difference. Result has 193 places, 146 transitions, 1186 flow [2024-06-21 16:23:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1186, PETRI_PLACES=193, PETRI_TRANSITIONS=146} [2024-06-21 16:23:30,617 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2024-06-21 16:23:30,617 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 146 transitions, 1186 flow [2024-06-21 16:23:30,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:30,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:30,617 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 16:23:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:23:30,617 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:30,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -381725151, now seen corresponding path program 5 times [2024-06-21 16:23:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070179584] [2024-06-21 16:23:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:31,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070179584] [2024-06-21 16:23:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070179584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:31,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:31,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:31,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654861577] [2024-06-21 16:23:31,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:31,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 146 transitions, 1186 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:31,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:31,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:31,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:31,897 INFO L124 PetriNetUnfolderBase]: 299/605 cut-off events. [2024-06-21 16:23:31,897 INFO L125 PetriNetUnfolderBase]: For 27105/27105 co-relation queries the response was YES. [2024-06-21 16:23:31,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2878 conditions, 605 events. 299/605 cut-off events. For 27105/27105 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3027 event pairs, 46 based on Foata normal form. 8/613 useless extension candidates. Maximal degree in co-relation 2788. Up to 483 conditions per place. [2024-06-21 16:23:31,901 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 135 selfloop transitions, 14 changer transitions 17/169 dead transitions. [2024-06-21 16:23:31,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 169 transitions, 1597 flow [2024-06-21 16:23:31,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:23:31,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 16:23:31,902 INFO L175 Difference]: Start difference. First operand has 193 places, 146 transitions, 1186 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:23:31,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 169 transitions, 1597 flow [2024-06-21 16:23:31,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 169 transitions, 1555 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:31,946 INFO L231 Difference]: Finished difference. Result has 192 places, 143 transitions, 1146 flow [2024-06-21 16:23:31,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1146, PETRI_PLACES=192, PETRI_TRANSITIONS=143} [2024-06-21 16:23:31,947 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-21 16:23:31,947 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 143 transitions, 1146 flow [2024-06-21 16:23:31,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:31,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:31,948 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 16:23:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:23:31,948 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:31,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1043985759, now seen corresponding path program 6 times [2024-06-21 16:23:31,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:31,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922271341] [2024-06-21 16:23:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:32,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:32,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922271341] [2024-06-21 16:23:32,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922271341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:32,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:32,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:32,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399669133] [2024-06-21 16:23:32,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:32,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:32,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:32,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:32,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 143 transitions, 1146 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:32,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:32,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:32,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:33,142 INFO L124 PetriNetUnfolderBase]: 301/607 cut-off events. [2024-06-21 16:23:33,143 INFO L125 PetriNetUnfolderBase]: For 27057/27057 co-relation queries the response was YES. [2024-06-21 16:23:33,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 607 events. 301/607 cut-off events. For 27057/27057 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3026 event pairs, 15 based on Foata normal form. 8/615 useless extension candidates. Maximal degree in co-relation 2774. Up to 465 conditions per place. [2024-06-21 16:23:33,147 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 133 selfloop transitions, 13 changer transitions 20/169 dead transitions. [2024-06-21 16:23:33,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 169 transitions, 1566 flow [2024-06-21 16:23:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:23:33,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 16:23:33,149 INFO L175 Difference]: Start difference. First operand has 192 places, 143 transitions, 1146 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:23:33,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 169 transitions, 1566 flow [2024-06-21 16:23:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 169 transitions, 1528 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:33,198 INFO L231 Difference]: Finished difference. Result has 189 places, 140 transitions, 1112 flow [2024-06-21 16:23:33,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1112, PETRI_PLACES=189, PETRI_TRANSITIONS=140} [2024-06-21 16:23:33,199 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 160 predicate places. [2024-06-21 16:23:33,199 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 140 transitions, 1112 flow [2024-06-21 16:23:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:33,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:33,200 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 16:23:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:23:33,200 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:33,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1618989369, now seen corresponding path program 7 times [2024-06-21 16:23:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927059346] [2024-06-21 16:23:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:34,115 INFO 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 16:23:34,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:34,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927059346] [2024-06-21 16:23:34,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927059346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:34,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:34,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740263699] [2024-06-21 16:23:34,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:34,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:34,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:34,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 140 transitions, 1112 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:34,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:34,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:34,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:34,479 INFO L124 PetriNetUnfolderBase]: 275/545 cut-off events. [2024-06-21 16:23:34,479 INFO L125 PetriNetUnfolderBase]: For 18576/18576 co-relation queries the response was YES. [2024-06-21 16:23:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2679 conditions, 545 events. 275/545 cut-off events. For 18576/18576 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2677 event pairs, 27 based on Foata normal form. 2/547 useless extension candidates. Maximal degree in co-relation 2590. Up to 449 conditions per place. [2024-06-21 16:23:34,484 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 139 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-21 16:23:34,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 158 transitions, 1478 flow [2024-06-21 16:23:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 16:23:34,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-21 16:23:34,494 INFO L175 Difference]: Start difference. First operand has 189 places, 140 transitions, 1112 flow. Second operand 11 states and 125 transitions. [2024-06-21 16:23:34,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 158 transitions, 1478 flow [2024-06-21 16:23:34,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 158 transitions, 1416 flow, removed 4 selfloop flow, removed 16 redundant places. [2024-06-21 16:23:34,527 INFO L231 Difference]: Finished difference. Result has 180 places, 141 transitions, 1102 flow [2024-06-21 16:23:34,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=180, PETRI_TRANSITIONS=141} [2024-06-21 16:23:34,528 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2024-06-21 16:23:34,528 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 141 transitions, 1102 flow [2024-06-21 16:23:34,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:34,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:34,528 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 16:23:34,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:23:34,528 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:34,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:34,529 INFO L85 PathProgramCache]: Analyzing trace with hash 715201877, now seen corresponding path program 8 times [2024-06-21 16:23:34,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:34,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446086165] [2024-06-21 16:23:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:34,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:35,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:35,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446086165] [2024-06-21 16:23:35,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446086165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:35,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:35,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828852048] [2024-06-21 16:23:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:35,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:35,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 141 transitions, 1102 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:35,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:35,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:35,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:35,704 INFO L124 PetriNetUnfolderBase]: 295/589 cut-off events. [2024-06-21 16:23:35,704 INFO L125 PetriNetUnfolderBase]: For 27396/27396 co-relation queries the response was YES. [2024-06-21 16:23:35,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2797 conditions, 589 events. 295/589 cut-off events. For 27396/27396 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 2961 event pairs, 27 based on Foata normal form. 8/597 useless extension candidates. Maximal degree in co-relation 2715. Up to 478 conditions per place. [2024-06-21 16:23:35,708 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 134 selfloop transitions, 13 changer transitions 12/162 dead transitions. [2024-06-21 16:23:35,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 162 transitions, 1497 flow [2024-06-21 16:23:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 16:23:35,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-21 16:23:35,709 INFO L175 Difference]: Start difference. First operand has 180 places, 141 transitions, 1102 flow. Second operand 11 states and 128 transitions. [2024-06-21 16:23:35,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 162 transitions, 1497 flow [2024-06-21 16:23:35,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 162 transitions, 1455 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:35,756 INFO L231 Difference]: Finished difference. Result has 184 places, 140 transitions, 1084 flow [2024-06-21 16:23:35,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1084, PETRI_PLACES=184, PETRI_TRANSITIONS=140} [2024-06-21 16:23:35,757 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-21 16:23:35,757 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 140 transitions, 1084 flow [2024-06-21 16:23:35,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:35,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:35,758 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 16:23:35,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:23:35,758 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:35,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -887557709, now seen corresponding path program 9 times [2024-06-21 16:23:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67382662] [2024-06-21 16:23:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:35,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:36,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:36,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67382662] [2024-06-21 16:23:36,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67382662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:36,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:36,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596658061] [2024-06-21 16:23:36,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:36,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:36,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:36,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:36,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 140 transitions, 1084 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:36,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:36,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:36,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:36,976 INFO L124 PetriNetUnfolderBase]: 298/594 cut-off events. [2024-06-21 16:23:36,976 INFO L125 PetriNetUnfolderBase]: For 31897/31897 co-relation queries the response was YES. [2024-06-21 16:23:36,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 594 events. 298/594 cut-off events. For 31897/31897 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3003 event pairs, 37 based on Foata normal form. 10/604 useless extension candidates. Maximal degree in co-relation 2773. Up to 478 conditions per place. [2024-06-21 16:23:36,982 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 135 selfloop transitions, 14 changer transitions 12/164 dead transitions. [2024-06-21 16:23:36,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 164 transitions, 1533 flow [2024-06-21 16:23:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:23:36,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-21 16:23:36,983 INFO L175 Difference]: Start difference. First operand has 184 places, 140 transitions, 1084 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:23:36,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 164 transitions, 1533 flow [2024-06-21 16:23:37,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 164 transitions, 1501 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:37,035 INFO L231 Difference]: Finished difference. Result has 184 places, 141 transitions, 1100 flow [2024-06-21 16:23:37,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1100, PETRI_PLACES=184, PETRI_TRANSITIONS=141} [2024-06-21 16:23:37,036 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-21 16:23:37,036 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 141 transitions, 1100 flow [2024-06-21 16:23:37,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:37,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:37,036 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 16:23:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:23:37,037 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:37,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash -892203989, now seen corresponding path program 10 times [2024-06-21 16:23:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665234965] [2024-06-21 16:23:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:38,047 INFO 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 16:23:38,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:38,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665234965] [2024-06-21 16:23:38,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665234965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:38,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:38,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311249577] [2024-06-21 16:23:38,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:38,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:38,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:38,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 141 transitions, 1100 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:38,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:38,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:38,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:38,452 INFO L124 PetriNetUnfolderBase]: 282/562 cut-off events. [2024-06-21 16:23:38,452 INFO L125 PetriNetUnfolderBase]: For 19393/19393 co-relation queries the response was YES. [2024-06-21 16:23:38,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 562 events. 282/562 cut-off events. For 19393/19393 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 2795 event pairs, 29 based on Foata normal form. 2/564 useless extension candidates. Maximal degree in co-relation 2625. Up to 480 conditions per place. [2024-06-21 16:23:38,456 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 139 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-21 16:23:38,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 158 transitions, 1467 flow [2024-06-21 16:23:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 16:23:38,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-06-21 16:23:38,457 INFO L175 Difference]: Start difference. First operand has 184 places, 141 transitions, 1100 flow. Second operand 11 states and 124 transitions. [2024-06-21 16:23:38,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 158 transitions, 1467 flow [2024-06-21 16:23:38,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 158 transitions, 1433 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:38,502 INFO L231 Difference]: Finished difference. Result has 185 places, 143 transitions, 1127 flow [2024-06-21 16:23:38,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1127, PETRI_PLACES=185, PETRI_TRANSITIONS=143} [2024-06-21 16:23:38,502 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 156 predicate places. [2024-06-21 16:23:38,502 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 143 transitions, 1127 flow [2024-06-21 16:23:38,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:38,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:38,503 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 16:23:38,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:23:38,503 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:38,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1766539315, now seen corresponding path program 11 times [2024-06-21 16:23:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:38,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579712599] [2024-06-21 16:23:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:39,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579712599] [2024-06-21 16:23:39,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579712599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:39,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:39,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:39,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539385199] [2024-06-21 16:23:39,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:39,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:39,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:39,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 143 transitions, 1127 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:39,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:39,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:39,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:39,994 INFO L124 PetriNetUnfolderBase]: 305/613 cut-off events. [2024-06-21 16:23:39,995 INFO L125 PetriNetUnfolderBase]: For 27723/27723 co-relation queries the response was YES. [2024-06-21 16:23:39,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2930 conditions, 613 events. 305/613 cut-off events. For 27723/27723 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3105 event pairs, 33 based on Foata normal form. 8/621 useless extension candidates. Maximal degree in co-relation 2845. Up to 512 conditions per place. [2024-06-21 16:23:39,999 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 139 selfloop transitions, 13 changer transitions 11/166 dead transitions. [2024-06-21 16:23:39,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 166 transitions, 1569 flow [2024-06-21 16:23:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 16:23:40,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-21 16:23:40,000 INFO L175 Difference]: Start difference. First operand has 185 places, 143 transitions, 1127 flow. Second operand 11 states and 126 transitions. [2024-06-21 16:23:40,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 166 transitions, 1569 flow [2024-06-21 16:23:40,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 166 transitions, 1527 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:40,055 INFO L231 Difference]: Finished difference. Result has 192 places, 146 transitions, 1151 flow [2024-06-21 16:23:40,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1151, PETRI_PLACES=192, PETRI_TRANSITIONS=146} [2024-06-21 16:23:40,055 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-21 16:23:40,056 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 146 transitions, 1151 flow [2024-06-21 16:23:40,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:40,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:40,059 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 16:23:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:23:40,060 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:40,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1766654635, now seen corresponding path program 12 times [2024-06-21 16:23:40,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:40,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578432582] [2024-06-21 16:23:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:40,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:40,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:40,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578432582] [2024-06-21 16:23:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578432582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106258137] [2024-06-21 16:23:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:40,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:40,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:40,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:40,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 146 transitions, 1151 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:40,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:40,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:40,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:41,196 INFO L124 PetriNetUnfolderBase]: 298/596 cut-off events. [2024-06-21 16:23:41,196 INFO L125 PetriNetUnfolderBase]: For 20375/20375 co-relation queries the response was YES. [2024-06-21 16:23:41,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2859 conditions, 596 events. 298/596 cut-off events. For 20375/20375 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3018 event pairs, 31 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 2769. Up to 514 conditions per place. [2024-06-21 16:23:41,201 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 145 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-21 16:23:41,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 164 transitions, 1534 flow [2024-06-21 16:23:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 16:23:41,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-06-21 16:23:41,205 INFO L175 Difference]: Start difference. First operand has 192 places, 146 transitions, 1151 flow. Second operand 11 states and 124 transitions. [2024-06-21 16:23:41,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 164 transitions, 1534 flow [2024-06-21 16:23:41,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 164 transitions, 1507 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:41,283 INFO L231 Difference]: Finished difference. Result has 194 places, 149 transitions, 1195 flow [2024-06-21 16:23:41,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1195, PETRI_PLACES=194, PETRI_TRANSITIONS=149} [2024-06-21 16:23:41,284 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2024-06-21 16:23:41,284 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 149 transitions, 1195 flow [2024-06-21 16:23:41,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:41,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:41,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:41,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:23:41,284 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:41,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:41,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1595659255, now seen corresponding path program 13 times [2024-06-21 16:23:41,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:41,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971494926] [2024-06-21 16:23:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:41,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:42,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:42,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971494926] [2024-06-21 16:23:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971494926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:42,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:42,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:42,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464361091] [2024-06-21 16:23:42,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:42,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:42,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:42,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:42,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 149 transitions, 1195 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:42,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:42,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:42,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:42,665 INFO L124 PetriNetUnfolderBase]: 317/633 cut-off events. [2024-06-21 16:23:42,665 INFO L125 PetriNetUnfolderBase]: For 20647/20647 co-relation queries the response was YES. [2024-06-21 16:23:42,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3089 conditions, 633 events. 317/633 cut-off events. For 20647/20647 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3262 event pairs, 37 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 2999. Up to 548 conditions per place. [2024-06-21 16:23:42,670 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 148 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-21 16:23:42,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 173 transitions, 1683 flow [2024-06-21 16:23:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 16:23:42,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-21 16:23:42,671 INFO L175 Difference]: Start difference. First operand has 194 places, 149 transitions, 1195 flow. Second operand 11 states and 128 transitions. [2024-06-21 16:23:42,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 173 transitions, 1683 flow [2024-06-21 16:23:42,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 173 transitions, 1641 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:42,727 INFO L231 Difference]: Finished difference. Result has 201 places, 159 transitions, 1342 flow [2024-06-21 16:23:42,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1342, PETRI_PLACES=201, PETRI_TRANSITIONS=159} [2024-06-21 16:23:42,727 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2024-06-21 16:23:42,728 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 159 transitions, 1342 flow [2024-06-21 16:23:42,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:42,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:42,728 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 16:23:42,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:23:42,728 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:42,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:42,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1595836885, now seen corresponding path program 14 times [2024-06-21 16:23:42,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:42,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451040825] [2024-06-21 16:23:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:43,696 INFO 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 16:23:43,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:43,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451040825] [2024-06-21 16:23:43,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451040825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:43,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:43,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667785933] [2024-06-21 16:23:43,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:43,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:43,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:43,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 159 transitions, 1342 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:44,055 INFO L124 PetriNetUnfolderBase]: 332/662 cut-off events. [2024-06-21 16:23:44,056 INFO L125 PetriNetUnfolderBase]: For 25143/25143 co-relation queries the response was YES. [2024-06-21 16:23:44,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3413 conditions, 662 events. 332/662 cut-off events. For 25143/25143 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3465 event pairs, 36 based on Foata normal form. 2/664 useless extension candidates. Maximal degree in co-relation 3319. Up to 554 conditions per place. [2024-06-21 16:23:44,061 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 151 selfloop transitions, 24 changer transitions 0/178 dead transitions. [2024-06-21 16:23:44,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 178 transitions, 1899 flow [2024-06-21 16:23:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 16:23:44,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-21 16:23:44,063 INFO L175 Difference]: Start difference. First operand has 201 places, 159 transitions, 1342 flow. Second operand 11 states and 130 transitions. [2024-06-21 16:23:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 178 transitions, 1899 flow [2024-06-21 16:23:44,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 178 transitions, 1848 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:44,121 INFO L231 Difference]: Finished difference. Result has 207 places, 162 transitions, 1400 flow [2024-06-21 16:23:44,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1400, PETRI_PLACES=207, PETRI_TRANSITIONS=162} [2024-06-21 16:23:44,121 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-06-21 16:23:44,122 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 162 transitions, 1400 flow [2024-06-21 16:23:44,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:44,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:44,122 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 16:23:44,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:23:44,122 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:44,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2013361073, now seen corresponding path program 15 times [2024-06-21 16:23:44,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:44,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85092104] [2024-06-21 16:23:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:44,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:45,347 INFO 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 16:23:45,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:45,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85092104] [2024-06-21 16:23:45,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85092104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:45,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:45,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813871889] [2024-06-21 16:23:45,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:45,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:45,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:45,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:45,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:45,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 162 transitions, 1400 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:45,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:45,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:45,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:45,703 INFO L124 PetriNetUnfolderBase]: 329/657 cut-off events. [2024-06-21 16:23:45,704 INFO L125 PetriNetUnfolderBase]: For 22512/22512 co-relation queries the response was YES. [2024-06-21 16:23:45,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3285 conditions, 657 events. 329/657 cut-off events. For 22512/22512 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3436 event pairs, 37 based on Foata normal form. 2/659 useless extension candidates. Maximal degree in co-relation 3189. Up to 572 conditions per place. [2024-06-21 16:23:45,708 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 151 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2024-06-21 16:23:45,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 176 transitions, 1786 flow [2024-06-21 16:23:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 16:23:45,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-21 16:23:45,710 INFO L175 Difference]: Start difference. First operand has 207 places, 162 transitions, 1400 flow. Second operand 11 states and 128 transitions. [2024-06-21 16:23:45,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 176 transitions, 1786 flow [2024-06-21 16:23:45,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 176 transitions, 1720 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:45,765 INFO L231 Difference]: Finished difference. Result has 212 places, 163 transitions, 1396 flow [2024-06-21 16:23:45,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1396, PETRI_PLACES=212, PETRI_TRANSITIONS=163} [2024-06-21 16:23:45,765 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2024-06-21 16:23:45,765 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 163 transitions, 1396 flow [2024-06-21 16:23:45,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:45,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:45,766 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 16:23:45,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:23:45,766 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:45,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:45,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1902900757, now seen corresponding path program 1 times [2024-06-21 16:23:45,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:45,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992762607] [2024-06-21 16:23:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:45,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:47,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:47,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992762607] [2024-06-21 16:23:47,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992762607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:47,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:23:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263081709] [2024-06-21 16:23:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:47,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:23:47,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:23:47,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:23:47,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:47,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 163 transitions, 1396 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:47,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:47,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:47,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:47,813 INFO L124 PetriNetUnfolderBase]: 344/690 cut-off events. [2024-06-21 16:23:47,813 INFO L125 PetriNetUnfolderBase]: For 32865/32865 co-relation queries the response was YES. [2024-06-21 16:23:47,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3418 conditions, 690 events. 344/690 cut-off events. For 32865/32865 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3658 event pairs, 41 based on Foata normal form. 8/698 useless extension candidates. Maximal degree in co-relation 3319. Up to 576 conditions per place. [2024-06-21 16:23:47,817 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 150 selfloop transitions, 20 changer transitions 9/182 dead transitions. [2024-06-21 16:23:47,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 182 transitions, 1846 flow [2024-06-21 16:23:47,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:23:47,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:23:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 16:23:47,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:23:47,820 INFO L175 Difference]: Start difference. First operand has 212 places, 163 transitions, 1396 flow. Second operand 12 states and 140 transitions. [2024-06-21 16:23:47,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 182 transitions, 1846 flow [2024-06-21 16:23:47,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 182 transitions, 1813 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:47,886 INFO L231 Difference]: Finished difference. Result has 219 places, 162 transitions, 1396 flow [2024-06-21 16:23:47,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1396, PETRI_PLACES=219, PETRI_TRANSITIONS=162} [2024-06-21 16:23:47,887 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2024-06-21 16:23:47,888 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 162 transitions, 1396 flow [2024-06-21 16:23:47,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:47,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:47,888 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 16:23:47,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:23:47,888 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:47,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:47,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1909387507, now seen corresponding path program 2 times [2024-06-21 16:23:47,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:47,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113244956] [2024-06-21 16:23:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:49,664 INFO 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 16:23:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:49,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113244956] [2024-06-21 16:23:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113244956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:49,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:49,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:23:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211408465] [2024-06-21 16:23:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:49,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:23:49,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:23:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:23:49,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:49,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 162 transitions, 1396 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:49,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:49,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:49,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:50,256 INFO L124 PetriNetUnfolderBase]: 348/699 cut-off events. [2024-06-21 16:23:50,257 INFO L125 PetriNetUnfolderBase]: For 34025/34025 co-relation queries the response was YES. [2024-06-21 16:23:50,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3465 conditions, 699 events. 348/699 cut-off events. For 34025/34025 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3731 event pairs, 43 based on Foata normal form. 8/706 useless extension candidates. Maximal degree in co-relation 3364. Up to 562 conditions per place. [2024-06-21 16:23:50,262 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 148 selfloop transitions, 25 changer transitions 9/185 dead transitions. [2024-06-21 16:23:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 185 transitions, 1891 flow [2024-06-21 16:23:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:23:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:23:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 16:23:50,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 16:23:50,263 INFO L175 Difference]: Start difference. First operand has 219 places, 162 transitions, 1396 flow. Second operand 12 states and 142 transitions. [2024-06-21 16:23:50,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 185 transitions, 1891 flow [2024-06-21 16:23:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 185 transitions, 1845 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:50,328 INFO L231 Difference]: Finished difference. Result has 220 places, 165 transitions, 1442 flow [2024-06-21 16:23:50,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1442, PETRI_PLACES=220, PETRI_TRANSITIONS=165} [2024-06-21 16:23:50,328 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 191 predicate places. [2024-06-21 16:23:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 165 transitions, 1442 flow [2024-06-21 16:23:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:50,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:50,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:50,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:23:50,329 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:50,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1589396201, now seen corresponding path program 3 times [2024-06-21 16:23:50,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576953441] [2024-06-21 16:23:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:51,783 INFO 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 16:23:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576953441] [2024-06-21 16:23:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576953441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:51,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:23:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952039875] [2024-06-21 16:23:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:51,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:23:51,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:23:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:23:51,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:51,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 165 transitions, 1442 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:51,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:51,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:51,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:52,245 INFO L124 PetriNetUnfolderBase]: 343/694 cut-off events. [2024-06-21 16:23:52,245 INFO L125 PetriNetUnfolderBase]: For 34005/34005 co-relation queries the response was YES. [2024-06-21 16:23:52,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3455 conditions, 694 events. 343/694 cut-off events. For 34005/34005 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3718 event pairs, 45 based on Foata normal form. 8/701 useless extension candidates. Maximal degree in co-relation 3353. Up to 555 conditions per place. [2024-06-21 16:23:52,249 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 149 selfloop transitions, 23 changer transitions 7/182 dead transitions. [2024-06-21 16:23:52,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 182 transitions, 1880 flow [2024-06-21 16:23:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:23:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:23:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 16:23:52,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-21 16:23:52,251 INFO L175 Difference]: Start difference. First operand has 220 places, 165 transitions, 1442 flow. Second operand 12 states and 142 transitions. [2024-06-21 16:23:52,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 182 transitions, 1880 flow [2024-06-21 16:23:52,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 182 transitions, 1829 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:52,323 INFO L231 Difference]: Finished difference. Result has 220 places, 162 transitions, 1408 flow [2024-06-21 16:23:52,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1408, PETRI_PLACES=220, PETRI_TRANSITIONS=162} [2024-06-21 16:23:52,323 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 191 predicate places. [2024-06-21 16:23:52,324 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 162 transitions, 1408 flow [2024-06-21 16:23:52,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:52,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:52,324 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 16:23:52,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:23:52,324 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:52,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1909395877, now seen corresponding path program 4 times [2024-06-21 16:23:52,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:52,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418427127] [2024-06-21 16:23:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:52,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:53,305 INFO 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 16:23:53,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418427127] [2024-06-21 16:23:53,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418427127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:53,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:53,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:53,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436440237] [2024-06-21 16:23:53,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:53,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:53,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:53,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:53,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:53,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 162 transitions, 1408 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:53,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:53,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:53,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:53,753 INFO L124 PetriNetUnfolderBase]: 353/721 cut-off events. [2024-06-21 16:23:53,753 INFO L125 PetriNetUnfolderBase]: For 41032/41032 co-relation queries the response was YES. [2024-06-21 16:23:53,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3861 conditions, 721 events. 353/721 cut-off events. For 41032/41032 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3872 event pairs, 50 based on Foata normal form. 6/727 useless extension candidates. Maximal degree in co-relation 3760. Up to 552 conditions per place. [2024-06-21 16:23:53,759 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 155 selfloop transitions, 17 changer transitions 7/182 dead transitions. [2024-06-21 16:23:53,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 182 transitions, 1976 flow [2024-06-21 16:23:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 16:23:53,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40606060606060607 [2024-06-21 16:23:53,761 INFO L175 Difference]: Start difference. First operand has 220 places, 162 transitions, 1408 flow. Second operand 11 states and 134 transitions. [2024-06-21 16:23:53,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 182 transitions, 1976 flow [2024-06-21 16:23:53,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 182 transitions, 1920 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:53,859 INFO L231 Difference]: Finished difference. Result has 220 places, 160 transitions, 1370 flow [2024-06-21 16:23:53,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1370, PETRI_PLACES=220, PETRI_TRANSITIONS=160} [2024-06-21 16:23:53,859 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 191 predicate places. [2024-06-21 16:23:53,859 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 160 transitions, 1370 flow [2024-06-21 16:23:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:53,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:53,860 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 16:23:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:23:53,860 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:53,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1284115583, now seen corresponding path program 16 times [2024-06-21 16:23:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:53,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099308860] [2024-06-21 16:23:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:54,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:54,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099308860] [2024-06-21 16:23:54,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099308860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:54,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:54,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:54,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410667638] [2024-06-21 16:23:54,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:54,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:54,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:54,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:54,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:54,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 160 transitions, 1370 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:54,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:54,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:54,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:54,974 INFO L124 PetriNetUnfolderBase]: 342/692 cut-off events. [2024-06-21 16:23:54,975 INFO L125 PetriNetUnfolderBase]: For 34583/34583 co-relation queries the response was YES. [2024-06-21 16:23:54,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3751 conditions, 692 events. 342/692 cut-off events. For 34583/34583 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3643 event pairs, 52 based on Foata normal form. 2/694 useless extension candidates. Maximal degree in co-relation 3649. Up to 603 conditions per place. [2024-06-21 16:23:54,980 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 149 selfloop transitions, 21 changer transitions 0/173 dead transitions. [2024-06-21 16:23:54,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 173 transitions, 1764 flow [2024-06-21 16:23:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:23:54,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 16:23:54,981 INFO L175 Difference]: Start difference. First operand has 220 places, 160 transitions, 1370 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:23:54,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 173 transitions, 1764 flow [2024-06-21 16:23:55,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 173 transitions, 1722 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:23:55,056 INFO L231 Difference]: Finished difference. Result has 217 places, 161 transitions, 1400 flow [2024-06-21 16:23:55,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1400, PETRI_PLACES=217, PETRI_TRANSITIONS=161} [2024-06-21 16:23:55,057 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2024-06-21 16:23:55,057 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 161 transitions, 1400 flow [2024-06-21 16:23:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:55,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:55,057 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 16:23:55,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:23:55,057 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:55,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash -506086051, now seen corresponding path program 17 times [2024-06-21 16:23:55,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:55,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984269864] [2024-06-21 16:23:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:55,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:56,052 INFO 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 16:23:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984269864] [2024-06-21 16:23:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984269864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:56,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:56,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729207758] [2024-06-21 16:23:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:56,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:56,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 161 transitions, 1400 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:56,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:56,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:56,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:56,449 INFO L124 PetriNetUnfolderBase]: 346/700 cut-off events. [2024-06-21 16:23:56,449 INFO L125 PetriNetUnfolderBase]: For 34842/34842 co-relation queries the response was YES. [2024-06-21 16:23:56,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 700 events. 346/700 cut-off events. For 34842/34842 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3705 event pairs, 48 based on Foata normal form. 2/702 useless extension candidates. Maximal degree in co-relation 3731. Up to 583 conditions per place. [2024-06-21 16:23:56,455 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 148 selfloop transitions, 24 changer transitions 0/175 dead transitions. [2024-06-21 16:23:56,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 175 transitions, 1802 flow [2024-06-21 16:23:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 16:23:56,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 16:23:56,476 INFO L175 Difference]: Start difference. First operand has 217 places, 161 transitions, 1400 flow. Second operand 10 states and 117 transitions. [2024-06-21 16:23:56,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 175 transitions, 1802 flow [2024-06-21 16:23:56,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 175 transitions, 1740 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:56,559 INFO L231 Difference]: Finished difference. Result has 219 places, 162 transitions, 1420 flow [2024-06-21 16:23:56,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1420, PETRI_PLACES=219, PETRI_TRANSITIONS=162} [2024-06-21 16:23:56,559 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2024-06-21 16:23:56,559 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 162 transitions, 1420 flow [2024-06-21 16:23:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:56,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:56,560 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 16:23:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:23:56,561 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:56,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 318644003, now seen corresponding path program 18 times [2024-06-21 16:23:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:56,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475795581] [2024-06-21 16:23:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:57,335 INFO 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 16:23:57,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:57,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475795581] [2024-06-21 16:23:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475795581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:57,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:57,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:57,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153859028] [2024-06-21 16:23:57,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:57,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:57,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 162 transitions, 1420 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:57,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:57,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:57,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:57,685 INFO L124 PetriNetUnfolderBase]: 350/708 cut-off events. [2024-06-21 16:23:57,685 INFO L125 PetriNetUnfolderBase]: For 35938/35938 co-relation queries the response was YES. [2024-06-21 16:23:57,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3902 conditions, 708 events. 350/708 cut-off events. For 35938/35938 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3766 event pairs, 50 based on Foata normal form. 2/710 useless extension candidates. Maximal degree in co-relation 3801. Up to 612 conditions per place. [2024-06-21 16:23:57,691 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 156 selfloop transitions, 18 changer transitions 0/177 dead transitions. [2024-06-21 16:23:57,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 177 transitions, 1830 flow [2024-06-21 16:23:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:23:57,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 16:23:57,692 INFO L175 Difference]: Start difference. First operand has 219 places, 162 transitions, 1420 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:23:57,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 177 transitions, 1830 flow [2024-06-21 16:23:57,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 177 transitions, 1758 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:57,778 INFO L231 Difference]: Finished difference. Result has 221 places, 163 transitions, 1418 flow [2024-06-21 16:23:57,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1418, PETRI_PLACES=221, PETRI_TRANSITIONS=163} [2024-06-21 16:23:57,779 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2024-06-21 16:23:57,779 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 163 transitions, 1418 flow [2024-06-21 16:23:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:57,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:57,779 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 16:23:57,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:23:57,780 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:57,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1284108639, now seen corresponding path program 5 times [2024-06-21 16:23:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:57,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151561447] [2024-06-21 16:23:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:58,843 INFO 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 16:23:58,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:58,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151561447] [2024-06-21 16:23:58,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151561447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:58,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:58,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:23:58,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013545964] [2024-06-21 16:23:58,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:58,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:23:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:23:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:23:58,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:23:58,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 163 transitions, 1418 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:58,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:58,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:23:58,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:59,212 INFO L124 PetriNetUnfolderBase]: 362/736 cut-off events. [2024-06-21 16:23:59,213 INFO L125 PetriNetUnfolderBase]: For 47462/47462 co-relation queries the response was YES. [2024-06-21 16:23:59,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3987 conditions, 736 events. 362/736 cut-off events. For 47462/47462 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3977 event pairs, 58 based on Foata normal form. 8/744 useless extension candidates. Maximal degree in co-relation 3885. Up to 618 conditions per place. [2024-06-21 16:23:59,218 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 148 selfloop transitions, 19 changer transitions 9/179 dead transitions. [2024-06-21 16:23:59,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 179 transitions, 1848 flow [2024-06-21 16:23:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:23:59,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-21 16:23:59,224 INFO L175 Difference]: Start difference. First operand has 221 places, 163 transitions, 1418 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:23:59,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 179 transitions, 1848 flow [2024-06-21 16:23:59,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 179 transitions, 1790 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:59,326 INFO L231 Difference]: Finished difference. Result has 224 places, 160 transitions, 1386 flow [2024-06-21 16:23:59,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1386, PETRI_PLACES=224, PETRI_TRANSITIONS=160} [2024-06-21 16:23:59,327 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 195 predicate places. [2024-06-21 16:23:59,327 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 160 transitions, 1386 flow [2024-06-21 16:23:59,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:59,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:59,328 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 16:23:59,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:23:59,328 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:23:59,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1985961019, now seen corresponding path program 19 times [2024-06-21 16:23:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301413891] [2024-06-21 16:23:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:00,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:00,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301413891] [2024-06-21 16:24:00,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301413891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:00,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:00,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298664270] [2024-06-21 16:24:00,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:00,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:00,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:00,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:00,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:00,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:00,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 160 transitions, 1386 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:00,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:00,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:00,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:00,641 INFO L124 PetriNetUnfolderBase]: 361/737 cut-off events. [2024-06-21 16:24:00,641 INFO L125 PetriNetUnfolderBase]: For 51967/51967 co-relation queries the response was YES. [2024-06-21 16:24:00,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 737 events. 361/737 cut-off events. For 51967/51967 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3981 event pairs, 58 based on Foata normal form. 10/747 useless extension candidates. Maximal degree in co-relation 3899. Up to 578 conditions per place. [2024-06-21 16:24:00,647 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 131 selfloop transitions, 35 changer transitions 6/175 dead transitions. [2024-06-21 16:24:00,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 175 transitions, 1830 flow [2024-06-21 16:24:00,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:24:00,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-21 16:24:00,648 INFO L175 Difference]: Start difference. First operand has 224 places, 160 transitions, 1386 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:24:00,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 175 transitions, 1830 flow [2024-06-21 16:24:00,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 175 transitions, 1780 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:00,743 INFO L231 Difference]: Finished difference. Result has 221 places, 158 transitions, 1418 flow [2024-06-21 16:24:00,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1418, PETRI_PLACES=221, PETRI_TRANSITIONS=158} [2024-06-21 16:24:00,744 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2024-06-21 16:24:00,744 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 158 transitions, 1418 flow [2024-06-21 16:24:00,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:00,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:00,744 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 16:24:00,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:24:00,746 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:00,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1487960779, now seen corresponding path program 20 times [2024-06-21 16:24:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895872473] [2024-06-21 16:24:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:01,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:01,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895872473] [2024-06-21 16:24:01,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895872473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:01,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:01,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748419874] [2024-06-21 16:24:01,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:01,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:01,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:01,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 158 transitions, 1418 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:01,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:01,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:01,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:02,017 INFO L124 PetriNetUnfolderBase]: 348/708 cut-off events. [2024-06-21 16:24:02,017 INFO L125 PetriNetUnfolderBase]: For 36326/36326 co-relation queries the response was YES. [2024-06-21 16:24:02,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 708 events. 348/708 cut-off events. For 36326/36326 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3791 event pairs, 56 based on Foata normal form. 2/710 useless extension candidates. Maximal degree in co-relation 3812. Up to 586 conditions per place. [2024-06-21 16:24:02,022 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 131 selfloop transitions, 36 changer transitions 0/170 dead transitions. [2024-06-21 16:24:02,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 170 transitions, 1808 flow [2024-06-21 16:24:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 16:24:02,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-21 16:24:02,023 INFO L175 Difference]: Start difference. First operand has 221 places, 158 transitions, 1418 flow. Second operand 10 states and 119 transitions. [2024-06-21 16:24:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 170 transitions, 1808 flow [2024-06-21 16:24:02,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 170 transitions, 1654 flow, removed 15 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:02,118 INFO L231 Difference]: Finished difference. Result has 219 places, 159 transitions, 1374 flow [2024-06-21 16:24:02,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1374, PETRI_PLACES=219, PETRI_TRANSITIONS=159} [2024-06-21 16:24:02,119 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2024-06-21 16:24:02,119 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 159 transitions, 1374 flow [2024-06-21 16:24:02,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:02,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:02,119 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 16:24:02,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:24:02,120 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:02,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2136338757, now seen corresponding path program 21 times [2024-06-21 16:24:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:02,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882726027] [2024-06-21 16:24:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:02,839 INFO 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 16:24:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882726027] [2024-06-21 16:24:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882726027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:02,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172221755] [2024-06-21 16:24:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:02,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:02,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:02,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:02,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 159 transitions, 1374 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:02,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:02,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:02,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:03,191 INFO L124 PetriNetUnfolderBase]: 360/740 cut-off events. [2024-06-21 16:24:03,208 INFO L125 PetriNetUnfolderBase]: For 46072/46072 co-relation queries the response was YES. [2024-06-21 16:24:03,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3950 conditions, 740 events. 360/740 cut-off events. For 46072/46072 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4004 event pairs, 58 based on Foata normal form. 8/748 useless extension candidates. Maximal degree in co-relation 3850. Up to 627 conditions per place. [2024-06-21 16:24:03,214 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 145 selfloop transitions, 15 changer transitions 11/174 dead transitions. [2024-06-21 16:24:03,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 174 transitions, 1786 flow [2024-06-21 16:24:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:24:03,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 16:24:03,215 INFO L175 Difference]: Start difference. First operand has 219 places, 159 transitions, 1374 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:24:03,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 174 transitions, 1786 flow [2024-06-21 16:24:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 174 transitions, 1690 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:03,306 INFO L231 Difference]: Finished difference. Result has 221 places, 156 transitions, 1285 flow [2024-06-21 16:24:03,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1285, PETRI_PLACES=221, PETRI_TRANSITIONS=156} [2024-06-21 16:24:03,307 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2024-06-21 16:24:03,307 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 156 transitions, 1285 flow [2024-06-21 16:24:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:03,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:03,307 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 16:24:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:24:03,308 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:03,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:03,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1214187597, now seen corresponding path program 22 times [2024-06-21 16:24:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:03,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071739772] [2024-06-21 16:24:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:04,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:04,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071739772] [2024-06-21 16:24:04,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071739772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:04,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:04,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:04,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228859975] [2024-06-21 16:24:04,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:04,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:04,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:04,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 156 transitions, 1285 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:04,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:04,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:04,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:04,597 INFO L124 PetriNetUnfolderBase]: 345/707 cut-off events. [2024-06-21 16:24:04,598 INFO L125 PetriNetUnfolderBase]: For 35720/35720 co-relation queries the response was YES. [2024-06-21 16:24:04,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3747 conditions, 707 events. 345/707 cut-off events. For 35720/35720 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3792 event pairs, 54 based on Foata normal form. 2/709 useless extension candidates. Maximal degree in co-relation 3646. Up to 544 conditions per place. [2024-06-21 16:24:04,604 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 128 selfloop transitions, 38 changer transitions 0/169 dead transitions. [2024-06-21 16:24:04,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 169 transitions, 1673 flow [2024-06-21 16:24:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:24:04,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:24:04,605 INFO L175 Difference]: Start difference. First operand has 221 places, 156 transitions, 1285 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:24:04,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 169 transitions, 1673 flow [2024-06-21 16:24:04,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 169 transitions, 1633 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:04,690 INFO L231 Difference]: Finished difference. Result has 216 places, 157 transitions, 1357 flow [2024-06-21 16:24:04,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1357, PETRI_PLACES=216, PETRI_TRANSITIONS=157} [2024-06-21 16:24:04,690 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-06-21 16:24:04,690 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 157 transitions, 1357 flow [2024-06-21 16:24:04,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:04,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:04,691 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 16:24:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:24:04,691 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:04,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2131754787, now seen corresponding path program 23 times [2024-06-21 16:24:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:04,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289746986] [2024-06-21 16:24:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:05,625 INFO 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 16:24:05,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:05,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289746986] [2024-06-21 16:24:05,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289746986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:05,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:05,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:05,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943372280] [2024-06-21 16:24:05,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:05,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:05,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:05,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:05,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:05,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:05,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 157 transitions, 1357 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:05,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:05,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:05,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:05,995 INFO L124 PetriNetUnfolderBase]: 357/735 cut-off events. [2024-06-21 16:24:05,995 INFO L125 PetriNetUnfolderBase]: For 46049/46049 co-relation queries the response was YES. [2024-06-21 16:24:06,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3922 conditions, 735 events. 357/735 cut-off events. For 46049/46049 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3995 event pairs, 52 based on Foata normal form. 8/743 useless extension candidates. Maximal degree in co-relation 3824. Up to 591 conditions per place. [2024-06-21 16:24:06,001 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 140 selfloop transitions, 11 changer transitions 19/173 dead transitions. [2024-06-21 16:24:06,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 173 transitions, 1769 flow [2024-06-21 16:24:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:06,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 16:24:06,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 16:24:06,021 INFO L175 Difference]: Start difference. First operand has 216 places, 157 transitions, 1357 flow. Second operand 10 states and 115 transitions. [2024-06-21 16:24:06,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 173 transitions, 1769 flow [2024-06-21 16:24:06,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 173 transitions, 1669 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:06,112 INFO L231 Difference]: Finished difference. Result has 217 places, 148 transitions, 1214 flow [2024-06-21 16:24:06,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1214, PETRI_PLACES=217, PETRI_TRANSITIONS=148} [2024-06-21 16:24:06,112 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2024-06-21 16:24:06,112 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 148 transitions, 1214 flow [2024-06-21 16:24:06,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:06,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:06,113 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 16:24:06,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:24:06,113 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1985715065, now seen corresponding path program 6 times [2024-06-21 16:24:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:06,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571040539] [2024-06-21 16:24:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:07,256 INFO 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 16:24:07,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:07,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571040539] [2024-06-21 16:24:07,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571040539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:07,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:07,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:07,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65320634] [2024-06-21 16:24:07,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:07,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:07,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 148 transitions, 1214 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:07,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:07,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:07,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:07,828 INFO L124 PetriNetUnfolderBase]: 349/723 cut-off events. [2024-06-21 16:24:07,828 INFO L125 PetriNetUnfolderBase]: For 56068/56068 co-relation queries the response was YES. [2024-06-21 16:24:07,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4286 conditions, 723 events. 349/723 cut-off events. For 56068/56068 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3909 event pairs, 64 based on Foata normal form. 6/729 useless extension candidates. Maximal degree in co-relation 4199. Up to 461 conditions per place. [2024-06-21 16:24:07,834 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 131 selfloop transitions, 25 changer transitions 7/166 dead transitions. [2024-06-21 16:24:07,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 166 transitions, 1766 flow [2024-06-21 16:24:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 16:24:07,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-21 16:24:07,835 INFO L175 Difference]: Start difference. First operand has 217 places, 148 transitions, 1214 flow. Second operand 10 states and 122 transitions. [2024-06-21 16:24:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 166 transitions, 1766 flow [2024-06-21 16:24:07,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 166 transitions, 1726 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:07,940 INFO L231 Difference]: Finished difference. Result has 207 places, 145 transitions, 1210 flow [2024-06-21 16:24:07,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1210, PETRI_PLACES=207, PETRI_TRANSITIONS=145} [2024-06-21 16:24:07,941 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-06-21 16:24:07,941 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 145 transitions, 1210 flow [2024-06-21 16:24:07,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:07,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:07,941 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 16:24:07,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:24:07,941 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:07,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1207746913, now seen corresponding path program 7 times [2024-06-21 16:24:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:07,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761132713] [2024-06-21 16:24:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:09,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:09,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761132713] [2024-06-21 16:24:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761132713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:09,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:09,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:09,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510309515] [2024-06-21 16:24:09,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:09,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:09,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:09,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:09,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 145 transitions, 1210 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:09,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:09,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:09,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:09,863 INFO L124 PetriNetUnfolderBase]: 346/714 cut-off events. [2024-06-21 16:24:09,863 INFO L125 PetriNetUnfolderBase]: For 53254/53254 co-relation queries the response was YES. [2024-06-21 16:24:09,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4215 conditions, 714 events. 346/714 cut-off events. For 53254/53254 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3834 event pairs, 68 based on Foata normal form. 8/722 useless extension candidates. Maximal degree in co-relation 4131. Up to 587 conditions per place. [2024-06-21 16:24:09,869 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 124 selfloop transitions, 24 changer transitions 9/160 dead transitions. [2024-06-21 16:24:09,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 160 transitions, 1594 flow [2024-06-21 16:24:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:24:09,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-21 16:24:09,871 INFO L175 Difference]: Start difference. First operand has 207 places, 145 transitions, 1210 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:24:09,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 160 transitions, 1594 flow [2024-06-21 16:24:09,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 160 transitions, 1526 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:09,953 INFO L231 Difference]: Finished difference. Result has 204 places, 142 transitions, 1167 flow [2024-06-21 16:24:09,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1167, PETRI_PLACES=204, PETRI_TRANSITIONS=142} [2024-06-21 16:24:09,954 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 175 predicate places. [2024-06-21 16:24:09,954 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 142 transitions, 1167 flow [2024-06-21 16:24:09,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:09,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:09,955 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 16:24:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:24:09,955 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:09,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1992210185, now seen corresponding path program 8 times [2024-06-21 16:24:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448637486] [2024-06-21 16:24:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:11,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:11,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448637486] [2024-06-21 16:24:11,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448637486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:11,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:11,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841455950] [2024-06-21 16:24:11,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:11,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:11,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:11,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:11,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 142 transitions, 1167 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:11,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:11,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:11,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:11,444 INFO L124 PetriNetUnfolderBase]: 342/710 cut-off events. [2024-06-21 16:24:11,444 INFO L125 PetriNetUnfolderBase]: For 58219/58219 co-relation queries the response was YES. [2024-06-21 16:24:11,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 710 events. 342/710 cut-off events. For 58219/58219 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3803 event pairs, 73 based on Foata normal form. 14/724 useless extension candidates. Maximal degree in co-relation 3895. Up to 547 conditions per place. [2024-06-21 16:24:11,449 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 119 selfloop transitions, 19 changer transitions 15/156 dead transitions. [2024-06-21 16:24:11,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 156 transitions, 1541 flow [2024-06-21 16:24:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 16:24:11,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-21 16:24:11,451 INFO L175 Difference]: Start difference. First operand has 204 places, 142 transitions, 1167 flow. Second operand 10 states and 117 transitions. [2024-06-21 16:24:11,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 156 transitions, 1541 flow [2024-06-21 16:24:11,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 156 transitions, 1471 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:11,541 INFO L231 Difference]: Finished difference. Result has 200 places, 133 transitions, 1053 flow [2024-06-21 16:24:11,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1053, PETRI_PLACES=200, PETRI_TRANSITIONS=133} [2024-06-21 16:24:11,541 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 171 predicate places. [2024-06-21 16:24:11,542 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 133 transitions, 1053 flow [2024-06-21 16:24:11,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:11,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:11,542 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 16:24:11,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:24:11,542 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:11,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:11,543 INFO L85 PathProgramCache]: Analyzing trace with hash 266689059, now seen corresponding path program 24 times [2024-06-21 16:24:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:11,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718152440] [2024-06-21 16:24:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:12,369 INFO 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 16:24:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718152440] [2024-06-21 16:24:12,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718152440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:12,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:12,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:12,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366961185] [2024-06-21 16:24:12,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:12,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:12,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:12,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:12,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:12,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 133 transitions, 1053 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:12,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:12,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:12,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:12,693 INFO L124 PetriNetUnfolderBase]: 307/637 cut-off events. [2024-06-21 16:24:12,693 INFO L125 PetriNetUnfolderBase]: For 39806/39806 co-relation queries the response was YES. [2024-06-21 16:24:12,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3674 conditions, 637 events. 307/637 cut-off events. For 39806/39806 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3271 event pairs, 68 based on Foata normal form. 2/639 useless extension candidates. Maximal degree in co-relation 3593. Up to 534 conditions per place. [2024-06-21 16:24:12,697 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 108 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-06-21 16:24:12,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 143 transitions, 1381 flow [2024-06-21 16:24:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 16:24:12,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-21 16:24:12,699 INFO L175 Difference]: Start difference. First operand has 200 places, 133 transitions, 1053 flow. Second operand 10 states and 118 transitions. [2024-06-21 16:24:12,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 143 transitions, 1381 flow [2024-06-21 16:24:12,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 143 transitions, 1327 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:12,770 INFO L231 Difference]: Finished difference. Result has 192 places, 134 transitions, 1097 flow [2024-06-21 16:24:12,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1097, PETRI_PLACES=192, PETRI_TRANSITIONS=134} [2024-06-21 16:24:12,771 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-21 16:24:12,771 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 134 transitions, 1097 flow [2024-06-21 16:24:12,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:12,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:12,771 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 16:24:12,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:24:12,771 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:12,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash 266684409, now seen corresponding path program 25 times [2024-06-21 16:24:12,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:12,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540602724] [2024-06-21 16:24:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:13,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:13,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540602724] [2024-06-21 16:24:13,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540602724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:13,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:13,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648739557] [2024-06-21 16:24:13,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:13,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:13,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:13,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 134 transitions, 1097 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:13,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:13,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:13,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:13,906 INFO L124 PetriNetUnfolderBase]: 340/704 cut-off events. [2024-06-21 16:24:13,906 INFO L125 PetriNetUnfolderBase]: For 50221/50221 co-relation queries the response was YES. [2024-06-21 16:24:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 704 events. 340/704 cut-off events. For 50221/50221 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3707 event pairs, 79 based on Foata normal form. 2/706 useless extension candidates. Maximal degree in co-relation 4446. Up to 528 conditions per place. [2024-06-21 16:24:13,911 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 113 selfloop transitions, 34 changer transitions 0/150 dead transitions. [2024-06-21 16:24:13,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 150 transitions, 1617 flow [2024-06-21 16:24:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 16:24:13,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 16:24:13,912 INFO L175 Difference]: Start difference. First operand has 192 places, 134 transitions, 1097 flow. Second operand 10 states and 123 transitions. [2024-06-21 16:24:13,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 150 transitions, 1617 flow [2024-06-21 16:24:14,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 150 transitions, 1533 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:14,011 INFO L231 Difference]: Finished difference. Result has 194 places, 136 transitions, 1139 flow [2024-06-21 16:24:14,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1139, PETRI_PLACES=194, PETRI_TRANSITIONS=136} [2024-06-21 16:24:14,012 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2024-06-21 16:24:14,012 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 136 transitions, 1139 flow [2024-06-21 16:24:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:14,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:14,012 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 16:24:14,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:24:14,012 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:14,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -607103217, now seen corresponding path program 26 times [2024-06-21 16:24:14,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:14,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813131931] [2024-06-21 16:24:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:14,841 INFO 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 16:24:14,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813131931] [2024-06-21 16:24:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813131931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:14,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339261139] [2024-06-21 16:24:14,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:14,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:14,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:14,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:14,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 136 transitions, 1139 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:14,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:14,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:14,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:15,202 INFO L124 PetriNetUnfolderBase]: 344/712 cut-off events. [2024-06-21 16:24:15,202 INFO L125 PetriNetUnfolderBase]: For 52269/52269 co-relation queries the response was YES. [2024-06-21 16:24:15,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4605 conditions, 712 events. 344/712 cut-off events. For 52269/52269 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3771 event pairs, 81 based on Foata normal form. 2/714 useless extension candidates. Maximal degree in co-relation 4526. Up to 570 conditions per place. [2024-06-21 16:24:15,208 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 103 selfloop transitions, 40 changer transitions 0/146 dead transitions. [2024-06-21 16:24:15,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 146 transitions, 1473 flow [2024-06-21 16:24:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:24:15,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:24:15,209 INFO L175 Difference]: Start difference. First operand has 194 places, 136 transitions, 1139 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:24:15,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 146 transitions, 1473 flow [2024-06-21 16:24:15,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 146 transitions, 1405 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:15,302 INFO L231 Difference]: Finished difference. Result has 198 places, 137 transitions, 1185 flow [2024-06-21 16:24:15,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1185, PETRI_PLACES=198, PETRI_TRANSITIONS=137} [2024-06-21 16:24:15,303 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 169 predicate places. [2024-06-21 16:24:15,303 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 137 transitions, 1185 flow [2024-06-21 16:24:15,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:15,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:15,303 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 16:24:15,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:24:15,304 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:15,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash -613359327, now seen corresponding path program 27 times [2024-06-21 16:24:15,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:15,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388103753] [2024-06-21 16:24:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:15,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:16,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388103753] [2024-06-21 16:24:16,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388103753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:16,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:16,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:16,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163408650] [2024-06-21 16:24:16,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:16,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:16,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:16,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:16,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 137 transitions, 1185 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:16,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:16,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:16,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:16,543 INFO L124 PetriNetUnfolderBase]: 348/720 cut-off events. [2024-06-21 16:24:16,544 INFO L125 PetriNetUnfolderBase]: For 54263/54263 co-relation queries the response was YES. [2024-06-21 16:24:16,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4725 conditions, 720 events. 348/720 cut-off events. For 54263/54263 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3820 event pairs, 83 based on Foata normal form. 2/722 useless extension candidates. Maximal degree in co-relation 4644. Up to 540 conditions per place. [2024-06-21 16:24:16,549 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 86 selfloop transitions, 58 changer transitions 0/147 dead transitions. [2024-06-21 16:24:16,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 147 transitions, 1523 flow [2024-06-21 16:24:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 16:24:16,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-21 16:24:16,561 INFO L175 Difference]: Start difference. First operand has 198 places, 137 transitions, 1185 flow. Second operand 10 states and 123 transitions. [2024-06-21 16:24:16,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 147 transitions, 1523 flow [2024-06-21 16:24:16,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 147 transitions, 1419 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:16,669 INFO L231 Difference]: Finished difference. Result has 200 places, 138 transitions, 1233 flow [2024-06-21 16:24:16,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1233, PETRI_PLACES=200, PETRI_TRANSITIONS=138} [2024-06-21 16:24:16,670 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 171 predicate places. [2024-06-21 16:24:16,670 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 138 transitions, 1233 flow [2024-06-21 16:24:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:16,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:16,670 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 16:24:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:24:16,670 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:16,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash 273118149, now seen corresponding path program 28 times [2024-06-21 16:24:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:16,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208308033] [2024-06-21 16:24:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:16,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:17,407 INFO 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 16:24:17,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208308033] [2024-06-21 16:24:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208308033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:17,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:17,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:17,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810686046] [2024-06-21 16:24:17,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:17,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:17,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:17,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 138 transitions, 1233 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:17,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:17,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:17,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:17,675 INFO L124 PetriNetUnfolderBase]: 335/697 cut-off events. [2024-06-21 16:24:17,675 INFO L125 PetriNetUnfolderBase]: For 52637/52637 co-relation queries the response was YES. [2024-06-21 16:24:17,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4078 conditions, 697 events. 335/697 cut-off events. For 52637/52637 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3690 event pairs, 74 based on Foata normal form. 10/707 useless extension candidates. Maximal degree in co-relation 3996. Up to 562 conditions per place. [2024-06-21 16:24:17,680 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 113 selfloop transitions, 28 changer transitions 6/150 dead transitions. [2024-06-21 16:24:17,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 150 transitions, 1589 flow [2024-06-21 16:24:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 16:24:17,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:24:17,682 INFO L175 Difference]: Start difference. First operand has 200 places, 138 transitions, 1233 flow. Second operand 10 states and 120 transitions. [2024-06-21 16:24:17,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 150 transitions, 1589 flow [2024-06-21 16:24:17,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 150 transitions, 1431 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:17,777 INFO L231 Difference]: Finished difference. Result has 202 places, 135 transitions, 1115 flow [2024-06-21 16:24:17,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1115, PETRI_PLACES=202, PETRI_TRANSITIONS=135} [2024-06-21 16:24:17,778 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 173 predicate places. [2024-06-21 16:24:17,778 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 135 transitions, 1115 flow [2024-06-21 16:24:17,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:17,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:17,778 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 16:24:17,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:24:17,778 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:17,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash 236357463, now seen corresponding path program 29 times [2024-06-21 16:24:17,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:17,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114464535] [2024-06-21 16:24:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:17,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:18,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114464535] [2024-06-21 16:24:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114464535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:18,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:18,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:18,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143632812] [2024-06-21 16:24:18,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:18,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:19,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:19,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 135 transitions, 1115 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:19,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:19,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:19,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:19,513 INFO L124 PetriNetUnfolderBase]: 329/681 cut-off events. [2024-06-21 16:24:19,513 INFO L125 PetriNetUnfolderBase]: For 45123/45123 co-relation queries the response was YES. [2024-06-21 16:24:19,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4105 conditions, 681 events. 329/681 cut-off events. For 45123/45123 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3576 event pairs, 71 based on Foata normal form. 2/683 useless extension candidates. Maximal degree in co-relation 4022. Up to 512 conditions per place. [2024-06-21 16:24:19,519 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 101 selfloop transitions, 44 changer transitions 0/148 dead transitions. [2024-06-21 16:24:19,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 148 transitions, 1609 flow [2024-06-21 16:24:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 16:24:19,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-21 16:24:19,520 INFO L175 Difference]: Start difference. First operand has 202 places, 135 transitions, 1115 flow. Second operand 10 states and 121 transitions. [2024-06-21 16:24:19,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 148 transitions, 1609 flow [2024-06-21 16:24:19,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 148 transitions, 1521 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:19,620 INFO L231 Difference]: Finished difference. Result has 201 places, 137 transitions, 1185 flow [2024-06-21 16:24:19,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1185, PETRI_PLACES=201, PETRI_TRANSITIONS=137} [2024-06-21 16:24:19,620 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2024-06-21 16:24:19,620 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 137 transitions, 1185 flow [2024-06-21 16:24:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:19,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:19,621 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 16:24:19,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:24:19,621 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:19,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 100450629, now seen corresponding path program 30 times [2024-06-21 16:24:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:19,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839273375] [2024-06-21 16:24:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:20,569 INFO 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 16:24:20,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:20,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839273375] [2024-06-21 16:24:20,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839273375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:20,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:20,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:20,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747236689] [2024-06-21 16:24:20,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:20,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:20,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:20,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:20,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 137 transitions, 1185 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:20,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:20,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:20,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:20,914 INFO L124 PetriNetUnfolderBase]: 341/709 cut-off events. [2024-06-21 16:24:20,914 INFO L125 PetriNetUnfolderBase]: For 56253/56253 co-relation queries the response was YES. [2024-06-21 16:24:20,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 709 events. 341/709 cut-off events. For 56253/56253 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3763 event pairs, 73 based on Foata normal form. 8/717 useless extension candidates. Maximal degree in co-relation 4188. Up to 603 conditions per place. [2024-06-21 16:24:20,919 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 122 selfloop transitions, 14 changer transitions 11/150 dead transitions. [2024-06-21 16:24:20,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 150 transitions, 1547 flow [2024-06-21 16:24:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:24:20,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-21 16:24:20,920 INFO L175 Difference]: Start difference. First operand has 201 places, 137 transitions, 1185 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:24:20,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 150 transitions, 1547 flow [2024-06-21 16:24:21,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 150 transitions, 1458 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:21,013 INFO L231 Difference]: Finished difference. Result has 205 places, 134 transitions, 1105 flow [2024-06-21 16:24:21,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1105, PETRI_PLACES=205, PETRI_TRANSITIONS=134} [2024-06-21 16:24:21,014 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2024-06-21 16:24:21,014 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 134 transitions, 1105 flow [2024-06-21 16:24:21,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:21,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:21,014 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 16:24:21,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:24:21,015 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:21,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:21,015 INFO L85 PathProgramCache]: Analyzing trace with hash -395627579, now seen corresponding path program 31 times [2024-06-21 16:24:21,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:21,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120766203] [2024-06-21 16:24:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:21,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:21,960 INFO 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 16:24:21,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:21,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120766203] [2024-06-21 16:24:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120766203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:21,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:21,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:21,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936802077] [2024-06-21 16:24:21,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:21,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:21,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:22,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:22,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 134 transitions, 1105 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:22,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:22,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:22,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:22,424 INFO L124 PetriNetUnfolderBase]: 319/662 cut-off events. [2024-06-21 16:24:22,424 INFO L125 PetriNetUnfolderBase]: For 44067/44067 co-relation queries the response was YES. [2024-06-21 16:24:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 662 events. 319/662 cut-off events. For 44067/44067 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3442 event pairs, 110 based on Foata normal form. 2/663 useless extension candidates. Maximal degree in co-relation 3793. Up to 603 conditions per place. [2024-06-21 16:24:22,429 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 125 selfloop transitions, 16 changer transitions 0/144 dead transitions. [2024-06-21 16:24:22,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 144 transitions, 1409 flow [2024-06-21 16:24:22,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:24:22,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-21 16:24:22,430 INFO L175 Difference]: Start difference. First operand has 205 places, 134 transitions, 1105 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:24:22,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 144 transitions, 1409 flow [2024-06-21 16:24:22,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 144 transitions, 1330 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:22,513 INFO L231 Difference]: Finished difference. Result has 200 places, 134 transitions, 1062 flow [2024-06-21 16:24:22,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1062, PETRI_PLACES=200, PETRI_TRANSITIONS=134} [2024-06-21 16:24:22,514 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 171 predicate places. [2024-06-21 16:24:22,514 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 134 transitions, 1062 flow [2024-06-21 16:24:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:22,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:22,514 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 16:24:22,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:24:22,515 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:22,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -38624817, now seen corresponding path program 32 times [2024-06-21 16:24:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:22,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018399753] [2024-06-21 16:24:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:22,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:23,333 INFO 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 16:24:23,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:23,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018399753] [2024-06-21 16:24:23,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018399753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:23,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:23,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939040062] [2024-06-21 16:24:23,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:23,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:23,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:23,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:23,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 134 transitions, 1062 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:23,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:23,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:23,673 INFO L124 PetriNetUnfolderBase]: 324/678 cut-off events. [2024-06-21 16:24:23,674 INFO L125 PetriNetUnfolderBase]: For 47839/47839 co-relation queries the response was YES. [2024-06-21 16:24:23,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 678 events. 324/678 cut-off events. For 47839/47839 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3555 event pairs, 67 based on Foata normal form. 8/686 useless extension candidates. Maximal degree in co-relation 3618. Up to 567 conditions per place. [2024-06-21 16:24:23,679 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 118 selfloop transitions, 12 changer transitions 14/147 dead transitions. [2024-06-21 16:24:23,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 147 transitions, 1386 flow [2024-06-21 16:24:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 16:24:23,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-21 16:24:23,680 INFO L175 Difference]: Start difference. First operand has 200 places, 134 transitions, 1062 flow. Second operand 10 states and 113 transitions. [2024-06-21 16:24:23,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 147 transitions, 1386 flow [2024-06-21 16:24:23,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 147 transitions, 1344 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:23,779 INFO L231 Difference]: Finished difference. Result has 201 places, 129 transitions, 992 flow [2024-06-21 16:24:23,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=992, PETRI_PLACES=201, PETRI_TRANSITIONS=129} [2024-06-21 16:24:23,780 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2024-06-21 16:24:23,780 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 129 transitions, 992 flow [2024-06-21 16:24:23,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:23,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:23,780 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 16:24:23,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:24:23,781 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:23,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash -395620635, now seen corresponding path program 9 times [2024-06-21 16:24:23,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:23,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888885308] [2024-06-21 16:24:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:23,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:25,087 INFO 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 16:24:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888885308] [2024-06-21 16:24:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888885308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:25,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:25,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480864463] [2024-06-21 16:24:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:25,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:25,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:25,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:25,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 129 transitions, 992 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:25,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:25,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:25,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:25,582 INFO L124 PetriNetUnfolderBase]: 313/654 cut-off events. [2024-06-21 16:24:25,583 INFO L125 PetriNetUnfolderBase]: For 49688/49688 co-relation queries the response was YES. [2024-06-21 16:24:25,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3624 conditions, 654 events. 313/654 cut-off events. For 49688/49688 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3409 event pairs, 109 based on Foata normal form. 8/661 useless extension candidates. Maximal degree in co-relation 3540. Up to 562 conditions per place. [2024-06-21 16:24:25,588 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 118 selfloop transitions, 15 changer transitions 7/143 dead transitions. [2024-06-21 16:24:25,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 143 transitions, 1338 flow [2024-06-21 16:24:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 16:24:25,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-21 16:24:25,589 INFO L175 Difference]: Start difference. First operand has 201 places, 129 transitions, 992 flow. Second operand 11 states and 126 transitions. [2024-06-21 16:24:25,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 143 transitions, 1338 flow [2024-06-21 16:24:25,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 143 transitions, 1226 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:25,683 INFO L231 Difference]: Finished difference. Result has 194 places, 126 transitions, 898 flow [2024-06-21 16:24:25,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=898, PETRI_PLACES=194, PETRI_TRANSITIONS=126} [2024-06-21 16:24:25,684 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2024-06-21 16:24:25,684 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 126 transitions, 898 flow [2024-06-21 16:24:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:25,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:25,684 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 16:24:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:24:25,685 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:25,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash 236542037, now seen corresponding path program 10 times [2024-06-21 16:24:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:25,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313463989] [2024-06-21 16:24:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:26,760 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 16:24:26,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313463989] [2024-06-21 16:24:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313463989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:26,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:26,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214191581] [2024-06-21 16:24:26,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:26,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:26,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:26,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 126 transitions, 898 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:26,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:26,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:26,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:27,197 INFO L124 PetriNetUnfolderBase]: 308/648 cut-off events. [2024-06-21 16:24:27,197 INFO L125 PetriNetUnfolderBase]: For 47250/47250 co-relation queries the response was YES. [2024-06-21 16:24:27,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3416 conditions, 648 events. 308/648 cut-off events. For 47250/47250 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3393 event pairs, 71 based on Foata normal form. 8/656 useless extension candidates. Maximal degree in co-relation 3336. Up to 448 conditions per place. [2024-06-21 16:24:27,201 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 80 selfloop transitions, 43 changer transitions 12/138 dead transitions. [2024-06-21 16:24:27,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 138 transitions, 1228 flow [2024-06-21 16:24:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 16:24:27,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-06-21 16:24:27,202 INFO L175 Difference]: Start difference. First operand has 194 places, 126 transitions, 898 flow. Second operand 10 states and 124 transitions. [2024-06-21 16:24:27,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 138 transitions, 1228 flow [2024-06-21 16:24:27,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 138 transitions, 1192 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:27,284 INFO L231 Difference]: Finished difference. Result has 191 places, 120 transitions, 918 flow [2024-06-21 16:24:27,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=918, PETRI_PLACES=191, PETRI_TRANSITIONS=120} [2024-06-21 16:24:27,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2024-06-21 16:24:27,285 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 120 transitions, 918 flow [2024-06-21 16:24:27,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:27,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:27,285 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 16:24:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:24:27,286 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:27,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash 273125093, now seen corresponding path program 11 times [2024-06-21 16:24:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612951266] [2024-06-21 16:24:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:28,409 INFO 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 16:24:28,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:28,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612951266] [2024-06-21 16:24:28,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612951266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:28,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:28,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274240003] [2024-06-21 16:24:28,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:28,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:28,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:28,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:28,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:28,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:28,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 120 transitions, 918 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:28,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:28,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:28,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:28,704 INFO L124 PetriNetUnfolderBase]: 296/628 cut-off events. [2024-06-21 16:24:28,705 INFO L125 PetriNetUnfolderBase]: For 44860/44860 co-relation queries the response was YES. [2024-06-21 16:24:28,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 628 events. 296/628 cut-off events. For 44860/44860 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3271 event pairs, 71 based on Foata normal form. 8/636 useless extension candidates. Maximal degree in co-relation 3297. Up to 502 conditions per place. [2024-06-21 16:24:28,709 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 98 selfloop transitions, 19 changer transitions 13/133 dead transitions. [2024-06-21 16:24:28,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 133 transitions, 1240 flow [2024-06-21 16:24:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:28,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 16:24:28,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-21 16:24:28,710 INFO L175 Difference]: Start difference. First operand has 191 places, 120 transitions, 918 flow. Second operand 11 states and 127 transitions. [2024-06-21 16:24:28,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 133 transitions, 1240 flow [2024-06-21 16:24:28,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 133 transitions, 1146 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:28,785 INFO L231 Difference]: Finished difference. Result has 186 places, 114 transitions, 832 flow [2024-06-21 16:24:28,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=832, PETRI_PLACES=186, PETRI_TRANSITIONS=114} [2024-06-21 16:24:28,785 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-21 16:24:28,785 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 114 transitions, 832 flow [2024-06-21 16:24:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:28,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:28,786 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 16:24:28,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:24:28,786 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:28,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash -606865633, now seen corresponding path program 12 times [2024-06-21 16:24:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492956991] [2024-06-21 16:24:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:28,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:29,992 INFO 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 16:24:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492956991] [2024-06-21 16:24:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492956991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:29,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:29,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:29,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998398395] [2024-06-21 16:24:29,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:30,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:30,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 114 transitions, 832 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:30,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:30,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:30,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:30,481 INFO L124 PetriNetUnfolderBase]: 284/606 cut-off events. [2024-06-21 16:24:30,481 INFO L125 PetriNetUnfolderBase]: For 40189/40189 co-relation queries the response was YES. [2024-06-21 16:24:30,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 606 events. 284/606 cut-off events. For 40189/40189 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3122 event pairs, 71 based on Foata normal form. 8/614 useless extension candidates. Maximal degree in co-relation 3117. Up to 447 conditions per place. [2024-06-21 16:24:30,485 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 83 selfloop transitions, 32 changer transitions 9/127 dead transitions. [2024-06-21 16:24:30,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 127 transitions, 1142 flow [2024-06-21 16:24:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 16:24:30,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-21 16:24:30,486 INFO L175 Difference]: Start difference. First operand has 186 places, 114 transitions, 832 flow. Second operand 11 states and 131 transitions. [2024-06-21 16:24:30,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 127 transitions, 1142 flow [2024-06-21 16:24:30,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 127 transitions, 1096 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:30,557 INFO L231 Difference]: Finished difference. Result has 180 places, 111 transitions, 835 flow [2024-06-21 16:24:30,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=835, PETRI_PLACES=180, PETRI_TRANSITIONS=111} [2024-06-21 16:24:30,557 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2024-06-21 16:24:30,558 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 111 transitions, 835 flow [2024-06-21 16:24:30,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:30,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:30,558 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 16:24:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:24:30,558 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:30,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash -607096273, now seen corresponding path program 13 times [2024-06-21 16:24:30,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:30,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441655990] [2024-06-21 16:24:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:31,670 INFO 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 16:24:31,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441655990] [2024-06-21 16:24:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441655990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:31,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:31,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245107937] [2024-06-21 16:24:31,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:31,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:31,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:31,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:31,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 111 transitions, 835 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:31,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:31,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:31,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:32,134 INFO L124 PetriNetUnfolderBase]: 279/601 cut-off events. [2024-06-21 16:24:32,134 INFO L125 PetriNetUnfolderBase]: For 35931/35931 co-relation queries the response was YES. [2024-06-21 16:24:32,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3130 conditions, 601 events. 279/601 cut-off events. For 35931/35931 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3109 event pairs, 73 based on Foata normal form. 8/609 useless extension candidates. Maximal degree in co-relation 3057. Up to 416 conditions per place. [2024-06-21 16:24:32,141 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 77 selfloop transitions, 31 changer transitions 13/124 dead transitions. [2024-06-21 16:24:32,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 124 transitions, 1139 flow [2024-06-21 16:24:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 16:24:32,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-21 16:24:32,142 INFO L175 Difference]: Start difference. First operand has 180 places, 111 transitions, 835 flow. Second operand 11 states and 133 transitions. [2024-06-21 16:24:32,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 124 transitions, 1139 flow [2024-06-21 16:24:32,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 124 transitions, 1052 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:32,208 INFO L231 Difference]: Finished difference. Result has 178 places, 105 transitions, 782 flow [2024-06-21 16:24:32,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=782, PETRI_PLACES=178, PETRI_TRANSITIONS=105} [2024-06-21 16:24:32,209 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 149 predicate places. [2024-06-21 16:24:32,209 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 105 transitions, 782 flow [2024-06-21 16:24:32,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:32,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:32,209 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 16:24:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:24:32,209 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:32,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:32,210 INFO L85 PathProgramCache]: Analyzing trace with hash -606857263, now seen corresponding path program 14 times [2024-06-21 16:24:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:32,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159077076] [2024-06-21 16:24:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:32,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:33,398 INFO 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 16:24:33,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159077076] [2024-06-21 16:24:33,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159077076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:33,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:33,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430867410] [2024-06-21 16:24:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:33,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:33,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:33,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:33,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 105 transitions, 782 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:33,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:33,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:33,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:33,783 INFO L124 PetriNetUnfolderBase]: 263/575 cut-off events. [2024-06-21 16:24:33,784 INFO L125 PetriNetUnfolderBase]: For 33273/33273 co-relation queries the response was YES. [2024-06-21 16:24:33,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 575 events. 263/575 cut-off events. For 33273/33273 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2957 event pairs, 69 based on Foata normal form. 6/581 useless extension candidates. Maximal degree in co-relation 2921. Up to 423 conditions per place. [2024-06-21 16:24:33,787 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 78 selfloop transitions, 25 changer transitions 12/118 dead transitions. [2024-06-21 16:24:33,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 118 transitions, 1066 flow [2024-06-21 16:24:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:33,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 16:24:33,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-21 16:24:33,789 INFO L175 Difference]: Start difference. First operand has 178 places, 105 transitions, 782 flow. Second operand 11 states and 126 transitions. [2024-06-21 16:24:33,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 118 transitions, 1066 flow [2024-06-21 16:24:33,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 118 transitions, 996 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:33,840 INFO L231 Difference]: Finished difference. Result has 172 places, 101 transitions, 746 flow [2024-06-21 16:24:33,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=746, PETRI_PLACES=172, PETRI_TRANSITIONS=101} [2024-06-21 16:24:33,840 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 143 predicate places. [2024-06-21 16:24:33,841 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 101 transitions, 746 flow [2024-06-21 16:24:33,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:33,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:33,841 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 16:24:33,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:24:33,841 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:33,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash -576530317, now seen corresponding path program 15 times [2024-06-21 16:24:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:33,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127130002] [2024-06-21 16:24:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:34,965 INFO 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 16:24:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127130002] [2024-06-21 16:24:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127130002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:34,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:34,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058376532] [2024-06-21 16:24:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:34,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:35,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:35,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 101 transitions, 746 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:35,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:35,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:35,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:35,371 INFO L124 PetriNetUnfolderBase]: 277/605 cut-off events. [2024-06-21 16:24:35,371 INFO L125 PetriNetUnfolderBase]: For 38186/38186 co-relation queries the response was YES. [2024-06-21 16:24:35,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3448 conditions, 605 events. 277/605 cut-off events. For 38186/38186 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3134 event pairs, 85 based on Foata normal form. 6/611 useless extension candidates. Maximal degree in co-relation 3379. Up to 429 conditions per place. [2024-06-21 16:24:35,376 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 85 selfloop transitions, 22 changer transitions 8/118 dead transitions. [2024-06-21 16:24:35,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 118 transitions, 1168 flow [2024-06-21 16:24:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 16:24:35,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-21 16:24:35,377 INFO L175 Difference]: Start difference. First operand has 172 places, 101 transitions, 746 flow. Second operand 11 states and 129 transitions. [2024-06-21 16:24:35,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 118 transitions, 1168 flow [2024-06-21 16:24:35,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 118 transitions, 1106 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:35,444 INFO L231 Difference]: Finished difference. Result has 167 places, 97 transitions, 719 flow [2024-06-21 16:24:35,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=719, PETRI_PLACES=167, PETRI_TRANSITIONS=97} [2024-06-21 16:24:35,445 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2024-06-21 16:24:35,445 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 97 transitions, 719 flow [2024-06-21 16:24:35,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:35,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:35,445 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 16:24:35,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:24:35,446 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:35,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash 266868983, now seen corresponding path program 16 times [2024-06-21 16:24:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650265737] [2024-06-21 16:24:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:35,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:36,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650265737] [2024-06-21 16:24:36,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650265737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:36,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:36,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316685049] [2024-06-21 16:24:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:36,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:36,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:36,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:37,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:37,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 97 transitions, 719 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:37,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:37,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:37,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:37,427 INFO L124 PetriNetUnfolderBase]: 251/547 cut-off events. [2024-06-21 16:24:37,427 INFO L125 PetriNetUnfolderBase]: For 29263/29263 co-relation queries the response was YES. [2024-06-21 16:24:37,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2803 conditions, 547 events. 251/547 cut-off events. For 29263/29263 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2746 event pairs, 73 based on Foata normal form. 8/555 useless extension candidates. Maximal degree in co-relation 2736. Up to 439 conditions per place. [2024-06-21 16:24:37,430 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 83 selfloop transitions, 17 changer transitions 7/110 dead transitions. [2024-06-21 16:24:37,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 110 transitions, 995 flow [2024-06-21 16:24:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 16:24:37,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-06-21 16:24:37,431 INFO L175 Difference]: Start difference. First operand has 167 places, 97 transitions, 719 flow. Second operand 11 states and 123 transitions. [2024-06-21 16:24:37,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 110 transitions, 995 flow [2024-06-21 16:24:37,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 110 transitions, 939 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:37,479 INFO L231 Difference]: Finished difference. Result has 163 places, 94 transitions, 688 flow [2024-06-21 16:24:37,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=688, PETRI_PLACES=163, PETRI_TRANSITIONS=94} [2024-06-21 16:24:37,480 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2024-06-21 16:24:37,480 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 94 transitions, 688 flow [2024-06-21 16:24:37,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:37,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:37,480 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 16:24:37,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:24:37,480 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1245276045, now seen corresponding path program 17 times [2024-06-21 16:24:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:37,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703663440] [2024-06-21 16:24:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:37,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:38,843 INFO 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 16:24:38,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703663440] [2024-06-21 16:24:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703663440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:38,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:38,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559627259] [2024-06-21 16:24:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:38,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:39,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:39,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 94 transitions, 688 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:39,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:39,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:39,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:39,385 INFO L124 PetriNetUnfolderBase]: 274/601 cut-off events. [2024-06-21 16:24:39,385 INFO L125 PetriNetUnfolderBase]: For 32300/32300 co-relation queries the response was YES. [2024-06-21 16:24:39,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 601 events. 274/601 cut-off events. For 32300/32300 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3118 event pairs, 119 based on Foata normal form. 6/606 useless extension candidates. Maximal degree in co-relation 3206. Up to 450 conditions per place. [2024-06-21 16:24:39,389 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 93 selfloop transitions, 15 changer transitions 6/117 dead transitions. [2024-06-21 16:24:39,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 117 transitions, 1125 flow [2024-06-21 16:24:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 16:24:39,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-21 16:24:39,390 INFO L175 Difference]: Start difference. First operand has 163 places, 94 transitions, 688 flow. Second operand 11 states and 131 transitions. [2024-06-21 16:24:39,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 117 transitions, 1125 flow [2024-06-21 16:24:39,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 117 transitions, 1081 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:39,451 INFO L231 Difference]: Finished difference. Result has 162 places, 96 transitions, 706 flow [2024-06-21 16:24:39,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=706, PETRI_PLACES=162, PETRI_TRANSITIONS=96} [2024-06-21 16:24:39,451 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-21 16:24:39,451 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 96 transitions, 706 flow [2024-06-21 16:24:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:39,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:39,452 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 16:24:39,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:24:39,452 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:39,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1245284415, now seen corresponding path program 18 times [2024-06-21 16:24:39,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:39,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967250003] [2024-06-21 16:24:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:39,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:40,577 INFO 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 16:24:40,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967250003] [2024-06-21 16:24:40,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967250003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:40,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:40,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:40,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451862562] [2024-06-21 16:24:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:40,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:40,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 96 transitions, 706 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:40,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:40,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:40,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:40,995 INFO L124 PetriNetUnfolderBase]: 277/610 cut-off events. [2024-06-21 16:24:40,996 INFO L125 PetriNetUnfolderBase]: For 39115/39115 co-relation queries the response was YES. [2024-06-21 16:24:40,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3173 conditions, 610 events. 277/610 cut-off events. For 39115/39115 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3220 event pairs, 126 based on Foata normal form. 16/625 useless extension candidates. Maximal degree in co-relation 3107. Up to 474 conditions per place. [2024-06-21 16:24:40,999 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 81 selfloop transitions, 16 changer transitions 9/109 dead transitions. [2024-06-21 16:24:40,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 109 transitions, 976 flow [2024-06-21 16:24:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 16:24:41,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-21 16:24:41,000 INFO L175 Difference]: Start difference. First operand has 162 places, 96 transitions, 706 flow. Second operand 10 states and 118 transitions. [2024-06-21 16:24:41,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 109 transitions, 976 flow [2024-06-21 16:24:41,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 109 transitions, 943 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:41,052 INFO L231 Difference]: Finished difference. Result has 162 places, 90 transitions, 665 flow [2024-06-21 16:24:41,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=665, PETRI_PLACES=162, PETRI_TRANSITIONS=90} [2024-06-21 16:24:41,053 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-21 16:24:41,053 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 90 transitions, 665 flow [2024-06-21 16:24:41,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:41,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:41,053 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 16:24:41,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:24:41,054 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:41,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:41,054 INFO L85 PathProgramCache]: Analyzing trace with hash -960176175, now seen corresponding path program 19 times [2024-06-21 16:24:41,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:41,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257163479] [2024-06-21 16:24:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:42,328 INFO 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 16:24:42,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257163479] [2024-06-21 16:24:42,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257163479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:42,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:42,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:42,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916091765] [2024-06-21 16:24:42,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:42,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:42,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:42,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:42,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 90 transitions, 665 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:42,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:42,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:42,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:42,754 INFO L124 PetriNetUnfolderBase]: 250/557 cut-off events. [2024-06-21 16:24:42,754 INFO L125 PetriNetUnfolderBase]: For 29270/29270 co-relation queries the response was YES. [2024-06-21 16:24:42,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 557 events. 250/557 cut-off events. For 29270/29270 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2835 event pairs, 120 based on Foata normal form. 6/562 useless extension candidates. Maximal degree in co-relation 2895. Up to 470 conditions per place. [2024-06-21 16:24:42,758 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 79 selfloop transitions, 13 changer transitions 10/105 dead transitions. [2024-06-21 16:24:42,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 105 transitions, 925 flow [2024-06-21 16:24:42,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 16:24:42,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-21 16:24:42,759 INFO L175 Difference]: Start difference. First operand has 162 places, 90 transitions, 665 flow. Second operand 12 states and 133 transitions. [2024-06-21 16:24:42,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 105 transitions, 925 flow [2024-06-21 16:24:42,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 105 transitions, 881 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 16:24:42,811 INFO L231 Difference]: Finished difference. Result has 160 places, 87 transitions, 633 flow [2024-06-21 16:24:42,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=633, PETRI_PLACES=160, PETRI_TRANSITIONS=87} [2024-06-21 16:24:42,812 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2024-06-21 16:24:42,812 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 87 transitions, 633 flow [2024-06-21 16:24:42,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:42,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:42,812 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 16:24:42,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:24:42,813 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:42,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:42,813 INFO L85 PathProgramCache]: Analyzing trace with hash -950056845, now seen corresponding path program 20 times [2024-06-21 16:24:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:42,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382711309] [2024-06-21 16:24:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:42,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:44,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:44,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382711309] [2024-06-21 16:24:44,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382711309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:44,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:44,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:44,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467285991] [2024-06-21 16:24:44,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:44,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:44,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:44,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:44,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 87 transitions, 633 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:44,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:44,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:44,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:44,553 INFO L124 PetriNetUnfolderBase]: 236/527 cut-off events. [2024-06-21 16:24:44,553 INFO L125 PetriNetUnfolderBase]: For 27186/27186 co-relation queries the response was YES. [2024-06-21 16:24:44,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2712 conditions, 527 events. 236/527 cut-off events. For 27186/27186 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2615 event pairs, 115 based on Foata normal form. 6/532 useless extension candidates. Maximal degree in co-relation 2649. Up to 439 conditions per place. [2024-06-21 16:24:44,556 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 75 selfloop transitions, 11 changer transitions 13/102 dead transitions. [2024-06-21 16:24:44,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 102 transitions, 863 flow [2024-06-21 16:24:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:44,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 16:24:44,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 16:24:44,557 INFO L175 Difference]: Start difference. First operand has 160 places, 87 transitions, 633 flow. Second operand 12 states and 132 transitions. [2024-06-21 16:24:44,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 102 transitions, 863 flow [2024-06-21 16:24:44,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 102 transitions, 821 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 16:24:44,597 INFO L231 Difference]: Finished difference. Result has 156 places, 82 transitions, 579 flow [2024-06-21 16:24:44,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=579, PETRI_PLACES=156, PETRI_TRANSITIONS=82} [2024-06-21 16:24:44,597 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2024-06-21 16:24:44,597 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 82 transitions, 579 flow [2024-06-21 16:24:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:44,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:44,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:24:44,598 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1477142753, now seen corresponding path program 1 times [2024-06-21 16:24:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536736115] [2024-06-21 16:24:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:45,871 INFO 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 16:24:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:45,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536736115] [2024-06-21 16:24:45,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536736115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:45,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:45,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505578324] [2024-06-21 16:24:45,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:45,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:45,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:45,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 82 transitions, 579 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:45,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:45,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:45,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:46,271 INFO L124 PetriNetUnfolderBase]: 225/503 cut-off events. [2024-06-21 16:24:46,271 INFO L125 PetriNetUnfolderBase]: For 26271/26271 co-relation queries the response was YES. [2024-06-21 16:24:46,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 503 events. 225/503 cut-off events. For 26271/26271 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2441 event pairs, 72 based on Foata normal form. 6/509 useless extension candidates. Maximal degree in co-relation 2520. Up to 409 conditions per place. [2024-06-21 16:24:46,274 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 72 selfloop transitions, 11 changer transitions 15/101 dead transitions. [2024-06-21 16:24:46,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 101 transitions, 827 flow [2024-06-21 16:24:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 16:24:46,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:24:46,276 INFO L175 Difference]: Start difference. First operand has 156 places, 82 transitions, 579 flow. Second operand 12 states and 135 transitions. [2024-06-21 16:24:46,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 101 transitions, 827 flow [2024-06-21 16:24:46,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 101 transitions, 784 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:46,309 INFO L231 Difference]: Finished difference. Result has 150 places, 77 transitions, 522 flow [2024-06-21 16:24:46,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=522, PETRI_PLACES=150, PETRI_TRANSITIONS=77} [2024-06-21 16:24:46,310 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2024-06-21 16:24:46,310 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 77 transitions, 522 flow [2024-06-21 16:24:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:46,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:46,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:24:46,311 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:46,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1104443225, now seen corresponding path program 2 times [2024-06-21 16:24:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426372961] [2024-06-21 16:24:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:46,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:47,575 INFO 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 16:24:47,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426372961] [2024-06-21 16:24:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426372961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646526192] [2024-06-21 16:24:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:47,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:47,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:47,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 77 transitions, 522 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:47,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:47,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:47,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:47,845 INFO L124 PetriNetUnfolderBase]: 213/479 cut-off events. [2024-06-21 16:24:47,845 INFO L125 PetriNetUnfolderBase]: For 23783/23783 co-relation queries the response was YES. [2024-06-21 16:24:47,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2394 conditions, 479 events. 213/479 cut-off events. For 23783/23783 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2287 event pairs, 66 based on Foata normal form. 6/485 useless extension candidates. Maximal degree in co-relation 2335. Up to 371 conditions per place. [2024-06-21 16:24:47,848 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 65 selfloop transitions, 9 changer transitions 21/98 dead transitions. [2024-06-21 16:24:47,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 98 transitions, 766 flow [2024-06-21 16:24:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 16:24:47,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:24:47,849 INFO L175 Difference]: Start difference. First operand has 150 places, 77 transitions, 522 flow. Second operand 12 states and 135 transitions. [2024-06-21 16:24:47,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 98 transitions, 766 flow [2024-06-21 16:24:47,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 98 transitions, 730 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 16:24:47,877 INFO L231 Difference]: Finished difference. Result has 142 places, 71 transitions, 478 flow [2024-06-21 16:24:47,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=478, PETRI_PLACES=142, PETRI_TRANSITIONS=71} [2024-06-21 16:24:47,877 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2024-06-21 16:24:47,878 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 71 transitions, 478 flow [2024-06-21 16:24:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:47,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:47,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:24:47,878 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:47,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1145339453, now seen corresponding path program 3 times [2024-06-21 16:24:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923602288] [2024-06-21 16:24:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:47,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:49,640 INFO 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 16:24:49,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923602288] [2024-06-21 16:24:49,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923602288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:49,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:49,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:49,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542493880] [2024-06-21 16:24:49,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:49,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:49,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:49,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:49,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:49,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 71 transitions, 478 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:49,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:49,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:49,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:50,096 INFO L124 PetriNetUnfolderBase]: 191/433 cut-off events. [2024-06-21 16:24:50,096 INFO L125 PetriNetUnfolderBase]: For 23769/23769 co-relation queries the response was YES. [2024-06-21 16:24:50,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 433 events. 191/433 cut-off events. For 23769/23769 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2015 event pairs, 62 based on Foata normal form. 6/439 useless extension candidates. Maximal degree in co-relation 2187. Up to 337 conditions per place. [2024-06-21 16:24:50,099 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 63 selfloop transitions, 13 changer transitions 10/89 dead transitions. [2024-06-21 16:24:50,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 89 transitions, 696 flow [2024-06-21 16:24:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 16:24:50,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-06-21 16:24:50,100 INFO L175 Difference]: Start difference. First operand has 142 places, 71 transitions, 478 flow. Second operand 12 states and 134 transitions. [2024-06-21 16:24:50,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 89 transitions, 696 flow [2024-06-21 16:24:50,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 89 transitions, 668 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:50,124 INFO L231 Difference]: Finished difference. Result has 133 places, 67 transitions, 445 flow [2024-06-21 16:24:50,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=445, PETRI_PLACES=133, PETRI_TRANSITIONS=67} [2024-06-21 16:24:50,124 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 104 predicate places. [2024-06-21 16:24:50,124 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 67 transitions, 445 flow [2024-06-21 16:24:50,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:50,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:50,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:50,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:24:50,125 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:50,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2010317195, now seen corresponding path program 4 times [2024-06-21 16:24:50,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:50,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194513998] [2024-06-21 16:24:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:50,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:51,578 INFO 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 16:24:51,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:51,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194513998] [2024-06-21 16:24:51,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194513998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:51,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:51,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:51,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477177061] [2024-06-21 16:24:51,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:51,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:51,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:51,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:51,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 67 transitions, 445 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:51,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:51,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:51,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:51,952 INFO L124 PetriNetUnfolderBase]: 165/377 cut-off events. [2024-06-21 16:24:51,953 INFO L125 PetriNetUnfolderBase]: For 15421/15421 co-relation queries the response was YES. [2024-06-21 16:24:51,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 377 events. 165/377 cut-off events. For 15421/15421 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1679 event pairs, 51 based on Foata normal form. 6/383 useless extension candidates. Maximal degree in co-relation 1726. Up to 295 conditions per place. [2024-06-21 16:24:51,955 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 53 selfloop transitions, 6 changer transitions 21/83 dead transitions. [2024-06-21 16:24:51,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 83 transitions, 645 flow [2024-06-21 16:24:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:24:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:24:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 16:24:51,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-21 16:24:51,956 INFO L175 Difference]: Start difference. First operand has 133 places, 67 transitions, 445 flow. Second operand 12 states and 129 transitions. [2024-06-21 16:24:51,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 83 transitions, 645 flow [2024-06-21 16:24:51,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 83 transitions, 603 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 16:24:51,973 INFO L231 Difference]: Finished difference. Result has 128 places, 59 transitions, 352 flow [2024-06-21 16:24:51,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=128, PETRI_TRANSITIONS=59} [2024-06-21 16:24:51,974 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-21 16:24:51,974 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 59 transitions, 352 flow [2024-06-21 16:24:51,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:51,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:51,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:51,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:24:51,974 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:51,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1152876391, now seen corresponding path program 5 times [2024-06-21 16:24:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333846116] [2024-06-21 16:24:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333846116] [2024-06-21 16:24:53,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333846116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:53,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:53,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880100212] [2024-06-21 16:24:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:53,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:53,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 59 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:53,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:53,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:53,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:53,587 INFO L124 PetriNetUnfolderBase]: 154/346 cut-off events. [2024-06-21 16:24:53,587 INFO L125 PetriNetUnfolderBase]: For 15281/15281 co-relation queries the response was YES. [2024-06-21 16:24:53,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1626 conditions, 346 events. 154/346 cut-off events. For 15281/15281 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1488 event pairs, 51 based on Foata normal form. 6/352 useless extension candidates. Maximal degree in co-relation 1576. Up to 276 conditions per place. [2024-06-21 16:24:53,589 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 10 changer transitions 10/73 dead transitions. [2024-06-21 16:24:53,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 73 transitions, 528 flow [2024-06-21 16:24:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:24:53,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:24:53,590 INFO L175 Difference]: Start difference. First operand has 128 places, 59 transitions, 352 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:24:53,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 73 transitions, 528 flow [2024-06-21 16:24:53,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 73 transitions, 484 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-21 16:24:53,605 INFO L231 Difference]: Finished difference. Result has 111 places, 56 transitions, 317 flow [2024-06-21 16:24:53,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=317, PETRI_PLACES=111, PETRI_TRANSITIONS=56} [2024-06-21 16:24:53,605 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 82 predicate places. [2024-06-21 16:24:53,606 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 56 transitions, 317 flow [2024-06-21 16:24:53,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:53,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:53,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:53,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:24:53,606 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:53,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1158382921, now seen corresponding path program 6 times [2024-06-21 16:24:53,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:53,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119770244] [2024-06-21 16:24:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:53,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:54,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119770244] [2024-06-21 16:24:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119770244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248268316] [2024-06-21 16:24:54,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:54,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:54,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:54,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 56 transitions, 317 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:54,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:54,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:54,876 INFO L124 PetriNetUnfolderBase]: 147/333 cut-off events. [2024-06-21 16:24:54,876 INFO L125 PetriNetUnfolderBase]: For 15229/15229 co-relation queries the response was YES. [2024-06-21 16:24:54,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1557 conditions, 333 events. 147/333 cut-off events. For 15229/15229 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1416 event pairs, 49 based on Foata normal form. 6/339 useless extension candidates. Maximal degree in co-relation 1514. Up to 258 conditions per place. [2024-06-21 16:24:54,878 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 47 selfloop transitions, 8 changer transitions 13/71 dead transitions. [2024-06-21 16:24:54,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 71 transitions, 491 flow [2024-06-21 16:24:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:54,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:24:54,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:24:54,880 INFO L175 Difference]: Start difference. First operand has 111 places, 56 transitions, 317 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:24:54,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 71 transitions, 491 flow [2024-06-21 16:24:54,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 71 transitions, 465 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:54,895 INFO L231 Difference]: Finished difference. Result has 107 places, 52 transitions, 292 flow [2024-06-21 16:24:54,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=292, PETRI_PLACES=107, PETRI_TRANSITIONS=52} [2024-06-21 16:24:54,896 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2024-06-21 16:24:54,896 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 52 transitions, 292 flow [2024-06-21 16:24:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:54,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:54,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:54,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:24:54,896 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:54,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:54,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1288030519, now seen corresponding path program 7 times [2024-06-21 16:24:54,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:54,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304008912] [2024-06-21 16:24:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:55,863 INFO 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 16:24:55,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:55,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304008912] [2024-06-21 16:24:55,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304008912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:55,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:55,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295965057] [2024-06-21 16:24:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:55,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:55,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:55,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:55,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 52 transitions, 292 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:55,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:55,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:55,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:56,221 INFO L124 PetriNetUnfolderBase]: 136/312 cut-off events. [2024-06-21 16:24:56,221 INFO L125 PetriNetUnfolderBase]: For 13567/13567 co-relation queries the response was YES. [2024-06-21 16:24:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 312 events. 136/312 cut-off events. For 13567/13567 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1292 event pairs, 45 based on Foata normal form. 6/318 useless extension candidates. Maximal degree in co-relation 1418. Up to 232 conditions per place. [2024-06-21 16:24:56,223 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 41 selfloop transitions, 5 changer transitions 19/68 dead transitions. [2024-06-21 16:24:56,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 68 transitions, 462 flow [2024-06-21 16:24:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 16:24:56,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 16:24:56,224 INFO L175 Difference]: Start difference. First operand has 107 places, 52 transitions, 292 flow. Second operand 11 states and 120 transitions. [2024-06-21 16:24:56,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 68 transitions, 462 flow [2024-06-21 16:24:56,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 68 transitions, 438 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:56,235 INFO L231 Difference]: Finished difference. Result has 101 places, 46 transitions, 255 flow [2024-06-21 16:24:56,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=255, PETRI_PLACES=101, PETRI_TRANSITIONS=46} [2024-06-21 16:24:56,236 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-21 16:24:56,236 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 46 transitions, 255 flow [2024-06-21 16:24:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:56,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:56,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:24:56,236 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:56,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:56,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1634694367, now seen corresponding path program 8 times [2024-06-21 16:24:56,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:56,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062792609] [2024-06-21 16:24:56,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:56,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:57,397 INFO 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 16:24:57,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062792609] [2024-06-21 16:24:57,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062792609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:57,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:57,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:57,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610650924] [2024-06-21 16:24:57,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:57,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:57,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:57,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:57,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:57,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:57,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 46 transitions, 255 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:57,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:57,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:57,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:57,789 INFO L124 PetriNetUnfolderBase]: 119/275 cut-off events. [2024-06-21 16:24:57,790 INFO L125 PetriNetUnfolderBase]: For 11257/11257 co-relation queries the response was YES. [2024-06-21 16:24:57,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 275 events. 119/275 cut-off events. For 11257/11257 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1088 event pairs, 34 based on Foata normal form. 6/281 useless extension candidates. Maximal degree in co-relation 1263. Up to 193 conditions per place. [2024-06-21 16:24:57,791 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 38 selfloop transitions, 9 changer transitions 10/60 dead transitions. [2024-06-21 16:24:57,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 60 transitions, 403 flow [2024-06-21 16:24:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 16:24:57,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3606060606060606 [2024-06-21 16:24:57,792 INFO L175 Difference]: Start difference. First operand has 101 places, 46 transitions, 255 flow. Second operand 11 states and 119 transitions. [2024-06-21 16:24:57,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 60 transitions, 403 flow [2024-06-21 16:24:57,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 60 transitions, 383 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:57,800 INFO L231 Difference]: Finished difference. Result has 92 places, 42 transitions, 237 flow [2024-06-21 16:24:57,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=237, PETRI_PLACES=92, PETRI_TRANSITIONS=42} [2024-06-21 16:24:57,801 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-21 16:24:57,801 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 42 transitions, 237 flow [2024-06-21 16:24:57,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:57,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:57,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:24:57,802 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:24:57,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:57,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1214337115, now seen corresponding path program 9 times [2024-06-21 16:24:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:57,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412452348] [2024-06-21 16:24:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:57,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:59,805 INFO 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 16:24:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412452348] [2024-06-21 16:24:59,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412452348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:59,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:59,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453661529] [2024-06-21 16:24:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:59,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:24:59,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 42 transitions, 237 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:59,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:59,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:24:59,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:00,315 INFO L124 PetriNetUnfolderBase]: 93/219 cut-off events. [2024-06-21 16:25:00,315 INFO L125 PetriNetUnfolderBase]: For 6411/6411 co-relation queries the response was YES. [2024-06-21 16:25:00,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 219 events. 93/219 cut-off events. For 6411/6411 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 781 event pairs, 30 based on Foata normal form. 6/225 useless extension candidates. Maximal degree in co-relation 901. Up to 156 conditions per place. [2024-06-21 16:25:00,316 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 30 selfloop transitions, 3 changer transitions 19/55 dead transitions. [2024-06-21 16:25:00,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 55 transitions, 373 flow [2024-06-21 16:25:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 16:25:00,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3515151515151515 [2024-06-21 16:25:00,317 INFO L175 Difference]: Start difference. First operand has 92 places, 42 transitions, 237 flow. Second operand 11 states and 116 transitions. [2024-06-21 16:25:00,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 55 transitions, 373 flow [2024-06-21 16:25:00,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 55 transitions, 347 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 16:25:00,323 INFO L231 Difference]: Finished difference. Result has 86 places, 35 transitions, 186 flow [2024-06-21 16:25:00,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=186, PETRI_PLACES=86, PETRI_TRANSITIONS=35} [2024-06-21 16:25:00,323 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-21 16:25:00,323 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 35 transitions, 186 flow [2024-06-21 16:25:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:00,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:00,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:00,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:25:00,324 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:00,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1839775465, now seen corresponding path program 10 times [2024-06-21 16:25:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430764084] [2024-06-21 16:25:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:00,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:01,294 INFO 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 16:25:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:01,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430764084] [2024-06-21 16:25:01,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430764084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:01,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:01,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387820891] [2024-06-21 16:25:01,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:01,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:01,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:25:01,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 35 transitions, 186 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:01,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:25:01,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:01,509 INFO L124 PetriNetUnfolderBase]: 81/190 cut-off events. [2024-06-21 16:25:01,509 INFO L125 PetriNetUnfolderBase]: For 5028/5028 co-relation queries the response was YES. [2024-06-21 16:25:01,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 190 events. 81/190 cut-off events. For 5028/5028 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 644 event pairs, 28 based on Foata normal form. 6/196 useless extension candidates. Maximal degree in co-relation 769. Up to 62 conditions per place. [2024-06-21 16:25:01,510 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 27 selfloop transitions, 10 changer transitions 9/49 dead transitions. [2024-06-21 16:25:01,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 49 transitions, 362 flow [2024-06-21 16:25:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 16:25:01,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-21 16:25:01,511 INFO L175 Difference]: Start difference. First operand has 86 places, 35 transitions, 186 flow. Second operand 10 states and 110 transitions. [2024-06-21 16:25:01,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 49 transitions, 362 flow [2024-06-21 16:25:01,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 49 transitions, 320 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 16:25:01,515 INFO L231 Difference]: Finished difference. Result has 71 places, 30 transitions, 161 flow [2024-06-21 16:25:01,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=161, PETRI_PLACES=71, PETRI_TRANSITIONS=30} [2024-06-21 16:25:01,516 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-06-21 16:25:01,516 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 30 transitions, 161 flow [2024-06-21 16:25:01,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:01,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:01,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:25:01,517 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:01,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -24298485, now seen corresponding path program 11 times [2024-06-21 16:25:01,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:01,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332742158] [2024-06-21 16:25:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:03,634 INFO 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 16:25:03,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:03,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332742158] [2024-06-21 16:25:03,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332742158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:03,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:03,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494135883] [2024-06-21 16:25:03,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:03,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:03,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:03,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:03,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:03,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:25:03,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 30 transitions, 161 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:03,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:03,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:25:03,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:04,101 INFO L124 PetriNetUnfolderBase]: 54/131 cut-off events. [2024-06-21 16:25:04,101 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-06-21 16:25:04,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 131 events. 54/131 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 363 event pairs, 15 based on Foata normal form. 6/137 useless extension candidates. Maximal degree in co-relation 446. Up to 74 conditions per place. [2024-06-21 16:25:04,102 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 19 selfloop transitions, 4 changer transitions 16/42 dead transitions. [2024-06-21 16:25:04,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 42 transitions, 265 flow [2024-06-21 16:25:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 16:25:04,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-06-21 16:25:04,103 INFO L175 Difference]: Start difference. First operand has 71 places, 30 transitions, 161 flow. Second operand 11 states and 114 transitions. [2024-06-21 16:25:04,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 42 transitions, 265 flow [2024-06-21 16:25:04,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 42 transitions, 236 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 16:25:04,104 INFO L231 Difference]: Finished difference. Result has 65 places, 24 transitions, 115 flow [2024-06-21 16:25:04,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=115, PETRI_PLACES=65, PETRI_TRANSITIONS=24} [2024-06-21 16:25:04,105 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-21 16:25:04,105 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 24 transitions, 115 flow [2024-06-21 16:25:04,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:04,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:04,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:04,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:25:04,105 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:04,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash -191478825, now seen corresponding path program 12 times [2024-06-21 16:25:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:04,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893719340] [2024-06-21 16:25:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:04,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:05,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:05,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893719340] [2024-06-21 16:25:05,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893719340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:05,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:05,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:05,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396214684] [2024-06-21 16:25:05,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:05,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:05,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:05,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:05,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:25:05,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 24 transitions, 115 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:05,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:05,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:25:05,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:05,645 INFO L124 PetriNetUnfolderBase]: 44/107 cut-off events. [2024-06-21 16:25:05,646 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2024-06-21 16:25:05,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 107 events. 44/107 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 262 event pairs, 15 based on Foata normal form. 6/113 useless extension candidates. Maximal degree in co-relation 346. Up to 52 conditions per place. [2024-06-21 16:25:05,646 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 16 selfloop transitions, 7 changer transitions 10/36 dead transitions. [2024-06-21 16:25:05,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 36 transitions, 207 flow [2024-06-21 16:25:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:05,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-21 16:25:05,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2024-06-21 16:25:05,647 INFO L175 Difference]: Start difference. First operand has 65 places, 24 transitions, 115 flow. Second operand 11 states and 111 transitions. [2024-06-21 16:25:05,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 36 transitions, 207 flow [2024-06-21 16:25:05,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 36 transitions, 191 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:05,649 INFO L231 Difference]: Finished difference. Result has 55 places, 21 transitions, 102 flow [2024-06-21 16:25:05,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=102, PETRI_PLACES=55, PETRI_TRANSITIONS=21} [2024-06-21 16:25:05,649 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2024-06-21 16:25:05,649 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 21 transitions, 102 flow [2024-06-21 16:25:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:05,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:05,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:05,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:25:05,650 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 16:25:05,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash -899640139, now seen corresponding path program 13 times [2024-06-21 16:25:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:05,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678598093] [2024-06-21 16:25:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:05,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:07,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678598093] [2024-06-21 16:25:07,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678598093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:07,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:07,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72545950] [2024-06-21 16:25:07,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:07,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-06-21 16:25:07,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 21 transitions, 102 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:07,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:07,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-06-21 16:25:07,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:07,367 INFO L124 PetriNetUnfolderBase]: 22/61 cut-off events. [2024-06-21 16:25:07,367 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2024-06-21 16:25:07,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 61 events. 22/61 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 6/67 useless extension candidates. Maximal degree in co-relation 160. Up to 24 conditions per place. [2024-06-21 16:25:07,367 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2024-06-21 16:25:07,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 29 transitions, 148 flow [2024-06-21 16:25:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-21 16:25:07,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3151515151515151 [2024-06-21 16:25:07,368 INFO L175 Difference]: Start difference. First operand has 55 places, 21 transitions, 102 flow. Second operand 11 states and 104 transitions. [2024-06-21 16:25:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 29 transitions, 148 flow [2024-06-21 16:25:07,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 29 transitions, 116 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-21 16:25:07,369 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2024-06-21 16:25:07,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2024-06-21 16:25:07,369 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-06-21 16:25:07,370 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2024-06-21 16:25:07,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:07,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 16:25:07,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 16:25:07,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 16:25:07,372 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 16:25:07,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:25:07,373 INFO L445 BasicCegarLoop]: Path program histogram: [32, 20, 13, 10, 8, 8, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:07,375 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 16:25:07,375 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 16:25:07,380 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 16:25:07,380 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 16:25:07,382 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 04:25:07 BasicIcfg [2024-06-21 16:25:07,382 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 16:25:07,382 INFO L158 Benchmark]: Toolchain (without parser) took 169755.77ms. Allocated memory was 134.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 76.5MB in the beginning and 975.7MB in the end (delta: -899.1MB). Peak memory consumption was 246.9MB. Max. memory is 16.1GB. [2024-06-21 16:25:07,382 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 92.3MB. Free memory is still 57.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:25:07,382 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 92.3MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 16:25:07,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 501.19ms. Allocated memory is still 134.2MB. Free memory was 76.0MB in the beginning and 83.3MB in the end (delta: -7.2MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2024-06-21 16:25:07,383 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.91ms. Allocated memory is still 134.2MB. Free memory was 83.3MB in the beginning and 80.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 16:25:07,383 INFO L158 Benchmark]: Boogie Preprocessor took 73.96ms. Allocated memory is still 134.2MB. Free memory was 80.6MB in the beginning and 77.0MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 16:25:07,383 INFO L158 Benchmark]: RCFGBuilder took 688.39ms. Allocated memory is still 134.2MB. Free memory was 77.0MB in the beginning and 51.0MB in the end (delta: 26.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-06-21 16:25:07,383 INFO L158 Benchmark]: TraceAbstraction took 168425.95ms. Allocated memory was 134.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 51.0MB in the beginning and 975.7MB in the end (delta: -924.7MB). Peak memory consumption was 223.1MB. Max. memory is 16.1GB. [2024-06-21 16:25:07,384 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.14ms. Allocated memory is still 92.3MB. Free memory is still 57.0MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.11ms. Allocated memory is still 92.3MB. Free memory is still 51.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 501.19ms. Allocated memory is still 134.2MB. Free memory was 76.0MB in the beginning and 83.3MB in the end (delta: -7.2MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.91ms. Allocated memory is still 134.2MB. Free memory was 83.3MB in the beginning and 80.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.96ms. Allocated memory is still 134.2MB. Free memory was 80.6MB in the beginning and 77.0MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 688.39ms. Allocated memory is still 134.2MB. Free memory was 77.0MB in the beginning and 51.0MB in the end (delta: 26.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 168425.95ms. Allocated memory was 134.2MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 51.0MB in the beginning and 975.7MB in the end (delta: -924.7MB). Peak memory consumption was 223.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 824]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 825]: 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, 48 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: 168.3s, OverallIterations: 121, TraceHistogramMax: 1, PathProgramHistogramMax: 32, EmptinessCheckTime: 0.0s, AutomataDifference: 49.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7195 SdHoareTripleChecker+Valid, 27.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5996 mSDsluCounter, 4130 SdHoareTripleChecker+Invalid, 23.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3666 mSDsCounter, 1150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46604 IncrementalHoareTripleChecker+Invalid, 47754 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1150 mSolverCounterUnsat, 464 mSDtfsCounter, 46604 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1308 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 38.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1442occurred in iteration=73, InterpolantAutomatonStates: 1169, 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: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 116.9s InterpolantComputationTime, 1924 NumberOfCodeBlocks, 1924 NumberOfCodeBlocksAsserted, 121 NumberOfCheckSat, 1803 ConstructedInterpolants, 0 QuantifiedInterpolants, 90831 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 121 InterpolantComputations, 121 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 16:25:07,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE