./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi010.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/rfi010.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi010.i ./goblint.2024-05-21_14-57-05.files/protection/rfi010.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:39:53,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:39:53,604 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:39:53,609 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:39:53,609 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:39:53,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:39:53,633 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:39:53,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:39:53,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:39:53,637 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:39:53,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:39:53,637 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:39:53,638 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:39:53,639 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:39:53,639 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:39:53,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:39:53,640 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:39:53,640 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:39:53,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:39:53,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:39:53,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:39:53,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:39:53,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:39:53,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:39:53,642 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:39:53,642 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:39:53,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:39:53,642 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:39:53,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:39:53,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:39:53,644 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:39:53,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:39:53,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:39:53,652 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:39:53,652 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:39:53,653 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:39:53,653 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:39:53,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:39:53,653 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:39:53,653 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:39:53,654 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:39:53,654 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:39:53,654 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:39:53,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:39:53,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:39:53,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:39:53,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:39:53,921 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:39:53,921 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:39:53,922 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi010.i [2024-06-20 16:39:54,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:39:55,200 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:39:55,200 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi010.i [2024-06-20 16:39:55,213 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a2bea4b/a5f62734182649e38e5a2213f92f19cd/FLAGdc6d69df0 [2024-06-20 16:39:55,231 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52a2bea4b/a5f62734182649e38e5a2213f92f19cd [2024-06-20 16:39:55,236 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:39:55,236 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:39:55,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/rfi010.yml/witness.yml [2024-06-20 16:39:55,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:39:55,353 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:39:55,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:39:55,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:39:55,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:39:55,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:39:55" (1/2) ... [2024-06-20 16:39:55,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e182a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:39:55, skipping insertion in model container [2024-06-20 16:39:55,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:39:55" (1/2) ... [2024-06-20 16:39:55,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@333fb5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:39:55, skipping insertion in model container [2024-06-20 16:39:55,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:39:55" (2/2) ... [2024-06-20 16:39:55,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e182a97 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55, skipping insertion in model container [2024-06-20 16:39:55,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:39:55" (2/2) ... [2024-06-20 16:39:55,362 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:39:55,412 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:39:55,413 INFO L97 edCorrectnessWitness]: Location invariant before [L827-L827] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:39:55,413 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:39:55,413 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:39:55,413 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-20 16:39:55,449 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:39:55,746 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:39:55,754 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:39:55,863 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:39:55,887 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:39:55,887 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55 WrapperNode [2024-06-20 16:39:55,888 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:39:55,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:39:55,888 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:39:55,888 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:39:55,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:55,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,015 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-20 16:39:56,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:39:56,020 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:39:56,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:39:56,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:39:56,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,056 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,059 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,078 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]. [2024-06-20 16:39:56,081 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,107 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,109 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,110 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,111 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:39:56,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:39:56,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:39:56,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:39:56,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (1/1) ... [2024-06-20 16:39:56,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:39:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:39:56,167 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) [2024-06-20 16:39:56,183 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 [2024-06-20 16:39:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:39:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:39:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:39:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:39:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:39:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:39:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:39:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:39:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:39:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:39:56,198 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:39:56,311 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:39:56,313 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:39:56,623 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:39:56,623 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:39:56,763 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:39:56,764 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:39:56,765 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:39:56 BoogieIcfgContainer [2024-06-20 16:39:56,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:39:56,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:39:56,768 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:39:56,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:39:56,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:39:55" (1/4) ... [2024-06-20 16:39:56,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4622c654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:39:56, skipping insertion in model container [2024-06-20 16:39:56,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:39:55" (2/4) ... [2024-06-20 16:39:56,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4622c654 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:39:56, skipping insertion in model container [2024-06-20 16:39:56,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:39:55" (3/4) ... [2024-06-20 16:39:56,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4622c654 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:39:56, skipping insertion in model container [2024-06-20 16:39:56,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:39:56" (4/4) ... [2024-06-20 16:39:56,776 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi010.i [2024-06-20 16:39:56,809 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:39:56,810 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 16:39:56,810 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:39:56,866 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:39:56,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 16:39:56,921 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-20 16:39:56,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:39:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:39:56,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-20 16:39:56,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-20 16:39:56,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:39:56,937 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;@179902c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:39:56,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 16:39:56,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:39:56,941 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:39:56,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:39:56,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:56,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:39:56,942 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)] === [2024-06-20 16:39:56,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash 358540720, now seen corresponding path program 1 times [2024-06-20 16:39:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:56,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94741012] [2024-06-20 16:39:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:57,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94741012] [2024-06-20 16:39:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94741012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:57,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:39:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669596985] [2024-06-20 16:39:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:57,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:39:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:57,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:39:57,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:39:57,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-20 16:39:57,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:39:57,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:57,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-20 16:39:57,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:57,810 INFO L124 PetriNetUnfolderBase]: 131/261 cut-off events. [2024-06-20 16:39:57,810 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-20 16:39:57,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 261 events. 131/261 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1020 event pairs, 75 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 506. Up to 235 conditions per place. [2024-06-20 16:39:57,815 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 20 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-20 16:39:57,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 113 flow [2024-06-20 16:39:57,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:39:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:39:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-06-20 16:39:57,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-06-20 16:39:57,825 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 58 transitions. [2024-06-20 16:39:57,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 113 flow [2024-06-20 16:39:57,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 16:39:57,828 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-20 16:39:57,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-20 16:39:57,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-20 16:39:57,832 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-20 16:39:57,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:39:57,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:57,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:39:57,833 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)] === [2024-06-20 16:39:57,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:57,835 INFO L85 PathProgramCache]: Analyzing trace with hash 960277711, now seen corresponding path program 1 times [2024-06-20 16:39:57,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:57,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171573576] [2024-06-20 16:39:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:57,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:58,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:58,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171573576] [2024-06-20 16:39:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171573576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:58,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:58,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:39:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697532198] [2024-06-20 16:39:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:58,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:39:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:39:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:39:58,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-20 16:39:58,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:39:58,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:58,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-20 16:39:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:58,456 INFO L124 PetriNetUnfolderBase]: 147/280 cut-off events. [2024-06-20 16:39:58,456 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-06-20 16:39:58,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 280 events. 147/280 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1042 event pairs, 59 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 628. Up to 244 conditions per place. [2024-06-20 16:39:58,461 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-20 16:39:58,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 161 flow [2024-06-20 16:39:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:39:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:39:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-06-20 16:39:58,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-06-20 16:39:58,465 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 73 transitions. [2024-06-20 16:39:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 161 flow [2024-06-20 16:39:58,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:39:58,468 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-20 16:39:58,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-20 16:39:58,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-20 16:39:58,469 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-20 16:39:58,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:39:58,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:58,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:39:58,470 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:39:58,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:58,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1645613247, now seen corresponding path program 1 times [2024-06-20 16:39:58,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:58,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749175903] [2024-06-20 16:39:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:58,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:39:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:39:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:39:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749175903] [2024-06-20 16:39:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749175903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:39:59,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:39:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:39:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650396205] [2024-06-20 16:39:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:39:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:39:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:39:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:39:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:39:59,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-20 16:39:59,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:39:59,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:39:59,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-20 16:39:59,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:39:59,214 INFO L124 PetriNetUnfolderBase]: 123/246 cut-off events. [2024-06-20 16:39:59,214 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-06-20 16:39:59,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 246 events. 123/246 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 933 event pairs, 62 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 611. Up to 219 conditions per place. [2024-06-20 16:39:59,216 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 23 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2024-06-20 16:39:59,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 171 flow [2024-06-20 16:39:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:39:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:39:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-06-20 16:39:59,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-06-20 16:39:59,217 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 73 transitions. [2024-06-20 16:39:59,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 171 flow [2024-06-20 16:39:59,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 16:39:59,219 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 113 flow [2024-06-20 16:39:59,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-20 16:39:59,220 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-20 16:39:59,220 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 113 flow [2024-06-20 16:39:59,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:39:59,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:39:59,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:39:59,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:39:59,221 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:39:59,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:39:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1069977843, now seen corresponding path program 1 times [2024-06-20 16:39:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:39:59,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562385929] [2024-06-20 16:39:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:39:59,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:39:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:00,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562385929] [2024-06-20 16:40:00,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562385929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:00,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:00,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:40:00,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10898888] [2024-06-20 16:40:00,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:00,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:40:00,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:00,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:40:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:40:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-20 16:40:00,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 113 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:00,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:00,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-20 16:40:00,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:00,460 INFO L124 PetriNetUnfolderBase]: 141/269 cut-off events. [2024-06-20 16:40:00,461 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-06-20 16:40:00,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 269 events. 141/269 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 992 event pairs, 24 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 723. Up to 215 conditions per place. [2024-06-20 16:40:00,462 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 31 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-20 16:40:00,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 225 flow [2024-06-20 16:40:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:40:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:40:00,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-20 16:40:00,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-20 16:40:00,464 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 113 flow. Second operand 6 states and 99 transitions. [2024-06-20 16:40:00,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 225 flow [2024-06-20 16:40:00,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 214 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 16:40:00,465 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 127 flow [2024-06-20 16:40:00,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2024-06-20 16:40:00,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-20 16:40:00,466 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 127 flow [2024-06-20 16:40:00,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:00,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:00,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:40:00,467 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)] === [2024-06-20 16:40:00,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 539897294, now seen corresponding path program 1 times [2024-06-20 16:40:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:00,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666007576] [2024-06-20 16:40:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:01,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:01,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666007576] [2024-06-20 16:40:01,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666007576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:01,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:01,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:40:01,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548891399] [2024-06-20 16:40:01,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:01,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:40:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:40:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:40:01,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-20 16:40:01,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:01,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:01,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-20 16:40:01,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:01,291 INFO L124 PetriNetUnfolderBase]: 117/239 cut-off events. [2024-06-20 16:40:01,291 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2024-06-20 16:40:01,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 239 events. 117/239 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 888 event pairs, 33 based on Foata normal form. 1/239 useless extension candidates. Maximal degree in co-relation 687. Up to 205 conditions per place. [2024-06-20 16:40:01,293 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 25 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-20 16:40:01,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 215 flow [2024-06-20 16:40:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:40:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:40:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-20 16:40:01,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-20 16:40:01,295 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 127 flow. Second operand 6 states and 84 transitions. [2024-06-20 16:40:01,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 215 flow [2024-06-20 16:40:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 199 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 16:40:01,297 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 144 flow [2024-06-20 16:40:01,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2024-06-20 16:40:01,297 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-20 16:40:01,297 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 144 flow [2024-06-20 16:40:01,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:01,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:01,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:01,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:40:01,298 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)] === [2024-06-20 16:40:01,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash -886588478, now seen corresponding path program 1 times [2024-06-20 16:40:01,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:01,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793617045] [2024-06-20 16:40:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:01,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:01,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:01,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793617045] [2024-06-20 16:40:01,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793617045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:01,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:01,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:40:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365456827] [2024-06-20 16:40:01,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:01,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:40:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:40:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:40:01,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:01,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:01,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:01,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:01,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:01,947 INFO L124 PetriNetUnfolderBase]: 143/277 cut-off events. [2024-06-20 16:40:01,947 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2024-06-20 16:40:01,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 277 events. 143/277 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1043 event pairs, 39 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 851. Up to 240 conditions per place. [2024-06-20 16:40:01,949 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-20 16:40:01,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 258 flow [2024-06-20 16:40:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:40:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:40:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-20 16:40:01,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-20 16:40:01,951 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 144 flow. Second operand 6 states and 83 transitions. [2024-06-20 16:40:01,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 258 flow [2024-06-20 16:40:01,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 241 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:40:01,953 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 160 flow [2024-06-20 16:40:01,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2024-06-20 16:40:01,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-20 16:40:01,954 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 160 flow [2024-06-20 16:40:01,954 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) [2024-06-20 16:40:01,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:01,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:01,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:40:01,955 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)] === [2024-06-20 16:40:01,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:01,955 INFO L85 PathProgramCache]: Analyzing trace with hash -443061248, now seen corresponding path program 2 times [2024-06-20 16:40:01,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:01,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136250687] [2024-06-20 16:40:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:01,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:02,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:02,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136250687] [2024-06-20 16:40:02,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136250687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:02,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:02,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:40:02,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680254605] [2024-06-20 16:40:02,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:02,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:40:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:02,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:40:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:40:02,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:02,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:02,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:02,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:02,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:02,563 INFO L124 PetriNetUnfolderBase]: 144/278 cut-off events. [2024-06-20 16:40:02,563 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-06-20 16:40:02,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 278 events. 144/278 cut-off events. For 720/720 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1087 event pairs, 43 based on Foata normal form. 2/278 useless extension candidates. Maximal degree in co-relation 913. Up to 233 conditions per place. [2024-06-20 16:40:02,565 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2024-06-20 16:40:02,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 274 flow [2024-06-20 16:40:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:40:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:40:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-20 16:40:02,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-20 16:40:02,567 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 160 flow. Second operand 6 states and 83 transitions. [2024-06-20 16:40:02,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 274 flow [2024-06-20 16:40:02,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 257 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:40:02,569 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 186 flow [2024-06-20 16:40:02,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-06-20 16:40:02,569 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-20 16:40:02,570 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 186 flow [2024-06-20 16:40:02,570 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) [2024-06-20 16:40:02,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:02,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:02,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:40:02,570 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)] === [2024-06-20 16:40:02,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1103110033, now seen corresponding path program 1 times [2024-06-20 16:40:02,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:02,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482667182] [2024-06-20 16:40:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:02,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:03,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482667182] [2024-06-20 16:40:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482667182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:03,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:03,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:40:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736414444] [2024-06-20 16:40:03,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:03,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:40:03,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:03,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:40:03,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:40:03,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:03,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:03,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:03,471 INFO L124 PetriNetUnfolderBase]: 160/311 cut-off events. [2024-06-20 16:40:03,472 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2024-06-20 16:40:03,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 311 events. 160/311 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1254 event pairs, 39 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 1074. Up to 261 conditions per place. [2024-06-20 16:40:03,474 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 14 changer transitions 0/56 dead transitions. [2024-06-20 16:40:03,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 366 flow [2024-06-20 16:40:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:03,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-20 16:40:03,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-20 16:40:03,476 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 186 flow. Second operand 8 states and 107 transitions. [2024-06-20 16:40:03,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 366 flow [2024-06-20 16:40:03,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 331 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:40:03,480 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 248 flow [2024-06-20 16:40:03,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=248, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-20 16:40:03,482 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-20 16:40:03,482 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 248 flow [2024-06-20 16:40:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:03,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:03,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:03,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:40:03,484 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)] === [2024-06-20 16:40:03,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1913740113, now seen corresponding path program 2 times [2024-06-20 16:40:03,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:03,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508550665] [2024-06-20 16:40:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:04,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508550665] [2024-06-20 16:40:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508550665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:04,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:04,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:40:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671750067] [2024-06-20 16:40:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:40:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:40:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:40:04,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:04,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:04,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:04,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:04,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:04,416 INFO L124 PetriNetUnfolderBase]: 166/323 cut-off events. [2024-06-20 16:40:04,417 INFO L125 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2024-06-20 16:40:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1236 conditions, 323 events. 166/323 cut-off events. For 1227/1227 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1313 event pairs, 38 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 1211. Up to 259 conditions per place. [2024-06-20 16:40:04,418 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 35 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2024-06-20 16:40:04,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 404 flow [2024-06-20 16:40:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:40:04,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:40:04,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-20 16:40:04,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-20 16:40:04,420 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 248 flow. Second operand 7 states and 95 transitions. [2024-06-20 16:40:04,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 404 flow [2024-06-20 16:40:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 377 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:40:04,423 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 293 flow [2024-06-20 16:40:04,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-06-20 16:40:04,423 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-20 16:40:04,423 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 293 flow [2024-06-20 16:40:04,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:04,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:04,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:04,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:40:04,424 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)] === [2024-06-20 16:40:04,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1706819763, now seen corresponding path program 3 times [2024-06-20 16:40:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539097657] [2024-06-20 16:40:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:05,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:05,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539097657] [2024-06-20 16:40:05,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539097657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:05,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:05,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:40:05,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775717446] [2024-06-20 16:40:05,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:05,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:40:05,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:40:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:40:05,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:05,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 293 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:05,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:05,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:05,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:05,394 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-06-20 16:40:05,395 INFO L125 PetriNetUnfolderBase]: For 1627/1627 co-relation queries the response was YES. [2024-06-20 16:40:05,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 334 events. 174/334 cut-off events. For 1627/1627 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1358 event pairs, 41 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1382. Up to 249 conditions per place. [2024-06-20 16:40:05,397 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 26 changer transitions 0/62 dead transitions. [2024-06-20 16:40:05,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 499 flow [2024-06-20 16:40:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:40:05,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:40:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-20 16:40:05,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-20 16:40:05,399 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 293 flow. Second operand 7 states and 96 transitions. [2024-06-20 16:40:05,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 499 flow [2024-06-20 16:40:05,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 441 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:05,401 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 364 flow [2024-06-20 16:40:05,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-20 16:40:05,402 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-20 16:40:05,402 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 364 flow [2024-06-20 16:40:05,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:05,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:05,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:05,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:40:05,403 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)] === [2024-06-20 16:40:05,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:05,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1707086673, now seen corresponding path program 4 times [2024-06-20 16:40:05,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:05,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087595839] [2024-06-20 16:40:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:05,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087595839] [2024-06-20 16:40:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087595839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:06,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:06,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:40:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688774188] [2024-06-20 16:40:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:06,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:40:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:40:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:40:06,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:06,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:06,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:06,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:06,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:06,312 INFO L124 PetriNetUnfolderBase]: 170/328 cut-off events. [2024-06-20 16:40:06,312 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2024-06-20 16:40:06,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 328 events. 170/328 cut-off events. For 1669/1669 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1334 event pairs, 41 based on Foata normal form. 2/327 useless extension candidates. Maximal degree in co-relation 1397. Up to 263 conditions per place. [2024-06-20 16:40:06,314 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 41 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2024-06-20 16:40:06,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 527 flow [2024-06-20 16:40:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:40:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:40:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-20 16:40:06,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-20 16:40:06,316 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 364 flow. Second operand 7 states and 95 transitions. [2024-06-20 16:40:06,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 527 flow [2024-06-20 16:40:06,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 495 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:40:06,320 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 383 flow [2024-06-20 16:40:06,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-06-20 16:40:06,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-20 16:40:06,321 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 383 flow [2024-06-20 16:40:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:06,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:06,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:06,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:40:06,321 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)] === [2024-06-20 16:40:06,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -849719251, now seen corresponding path program 1 times [2024-06-20 16:40:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:06,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250092881] [2024-06-20 16:40:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:07,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:07,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250092881] [2024-06-20 16:40:07,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250092881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:07,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:07,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:40:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810250464] [2024-06-20 16:40:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:07,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:40:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:40:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:40:07,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:07,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 383 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:07,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:07,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:07,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:07,406 INFO L124 PetriNetUnfolderBase]: 168/327 cut-off events. [2024-06-20 16:40:07,406 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2024-06-20 16:40:07,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 327 events. 168/327 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1334 event pairs, 41 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 1439. Up to 286 conditions per place. [2024-06-20 16:40:07,408 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 47 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-20 16:40:07,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 539 flow [2024-06-20 16:40:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-20 16:40:07,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-20 16:40:07,410 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 383 flow. Second operand 8 states and 100 transitions. [2024-06-20 16:40:07,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 539 flow [2024-06-20 16:40:07,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 501 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:07,413 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 408 flow [2024-06-20 16:40:07,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-20 16:40:07,414 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-20 16:40:07,414 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 408 flow [2024-06-20 16:40:07,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:07,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:07,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:40:07,415 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)] === [2024-06-20 16:40:07,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:07,415 INFO L85 PathProgramCache]: Analyzing trace with hash 803414817, now seen corresponding path program 1 times [2024-06-20 16:40:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541231635] [2024-06-20 16:40:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:07,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:08,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541231635] [2024-06-20 16:40:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541231635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:08,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:08,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:40:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328582875] [2024-06-20 16:40:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:40:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:40:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:40:08,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:08,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:08,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:08,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:08,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:08,553 INFO L124 PetriNetUnfolderBase]: 166/324 cut-off events. [2024-06-20 16:40:08,553 INFO L125 PetriNetUnfolderBase]: For 1900/1900 co-relation queries the response was YES. [2024-06-20 16:40:08,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 324 events. 166/324 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1318 event pairs, 36 based on Foata normal form. 1/324 useless extension candidates. Maximal degree in co-relation 1442. Up to 269 conditions per place. [2024-06-20 16:40:08,555 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-06-20 16:40:08,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 594 flow [2024-06-20 16:40:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:40:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:40:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-20 16:40:08,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-20 16:40:08,556 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 408 flow. Second operand 7 states and 96 transitions. [2024-06-20 16:40:08,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 594 flow [2024-06-20 16:40:08,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 550 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:08,560 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 419 flow [2024-06-20 16:40:08,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=419, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-06-20 16:40:08,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-20 16:40:08,561 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 419 flow [2024-06-20 16:40:08,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:08,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:08,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:08,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:40:08,562 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)] === [2024-06-20 16:40:08,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:08,562 INFO L85 PathProgramCache]: Analyzing trace with hash 133008065, now seen corresponding path program 1 times [2024-06-20 16:40:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:08,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495992153] [2024-06-20 16:40:08,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:08,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:09,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495992153] [2024-06-20 16:40:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495992153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387132210] [2024-06-20 16:40:09,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:09,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:09,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 419 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:09,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:09,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:09,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:09,621 INFO L124 PetriNetUnfolderBase]: 172/334 cut-off events. [2024-06-20 16:40:09,635 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2024-06-20 16:40:09,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 334 events. 172/334 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1347 event pairs, 35 based on Foata normal form. 2/335 useless extension candidates. Maximal degree in co-relation 1522. Up to 260 conditions per place. [2024-06-20 16:40:09,638 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 47 selfloop transitions, 22 changer transitions 0/73 dead transitions. [2024-06-20 16:40:09,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 617 flow [2024-06-20 16:40:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-20 16:40:09,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-20 16:40:09,639 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 419 flow. Second operand 8 states and 107 transitions. [2024-06-20 16:40:09,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 617 flow [2024-06-20 16:40:09,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 578 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:09,642 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 465 flow [2024-06-20 16:40:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=465, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-06-20 16:40:09,643 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-20 16:40:09,643 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 465 flow [2024-06-20 16:40:09,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:09,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:09,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:09,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:40:09,644 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)] === [2024-06-20 16:40:09,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:09,644 INFO L85 PathProgramCache]: Analyzing trace with hash -580073985, now seen corresponding path program 2 times [2024-06-20 16:40:09,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:09,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230467126] [2024-06-20 16:40:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:09,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:10,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:10,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230467126] [2024-06-20 16:40:10,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230467126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:10,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174966347] [2024-06-20 16:40:10,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:10,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:10,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:10,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 465 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:10,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:10,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:10,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:10,705 INFO L124 PetriNetUnfolderBase]: 178/342 cut-off events. [2024-06-20 16:40:10,706 INFO L125 PetriNetUnfolderBase]: For 2752/2752 co-relation queries the response was YES. [2024-06-20 16:40:10,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 342 events. 178/342 cut-off events. For 2752/2752 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1389 event pairs, 38 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 1659. Up to 271 conditions per place. [2024-06-20 16:40:10,708 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 50 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2024-06-20 16:40:10,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 75 transitions, 681 flow [2024-06-20 16:40:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-20 16:40:10,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-20 16:40:10,710 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 465 flow. Second operand 8 states and 107 transitions. [2024-06-20 16:40:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 75 transitions, 681 flow [2024-06-20 16:40:10,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 75 transitions, 620 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:10,717 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 492 flow [2024-06-20 16:40:10,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=492, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2024-06-20 16:40:10,718 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-20 16:40:10,718 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 492 flow [2024-06-20 16:40:10,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:10,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:10,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:10,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:40:10,719 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)] === [2024-06-20 16:40:10,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash -571799775, now seen corresponding path program 3 times [2024-06-20 16:40:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493195016] [2024-06-20 16:40:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:11,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:11,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493195016] [2024-06-20 16:40:11,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493195016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:11,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:11,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:11,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797967827] [2024-06-20 16:40:11,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:11,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:11,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:11,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:11,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:11,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:11,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:11,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:11,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:11,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:11,712 INFO L124 PetriNetUnfolderBase]: 181/349 cut-off events. [2024-06-20 16:40:11,712 INFO L125 PetriNetUnfolderBase]: For 3201/3201 co-relation queries the response was YES. [2024-06-20 16:40:11,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 349 events. 181/349 cut-off events. For 3201/3201 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1430 event pairs, 38 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 1746. Up to 238 conditions per place. [2024-06-20 16:40:11,715 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 40 selfloop transitions, 35 changer transitions 0/79 dead transitions. [2024-06-20 16:40:11,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 79 transitions, 746 flow [2024-06-20 16:40:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-06-20 16:40:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2024-06-20 16:40:11,717 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 492 flow. Second operand 8 states and 109 transitions. [2024-06-20 16:40:11,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 79 transitions, 746 flow [2024-06-20 16:40:11,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 680 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:11,721 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 557 flow [2024-06-20 16:40:11,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=557, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2024-06-20 16:40:11,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-20 16:40:11,722 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 557 flow [2024-06-20 16:40:11,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:11,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:11,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:11,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:40:11,724 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)] === [2024-06-20 16:40:11,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1371507681, now seen corresponding path program 4 times [2024-06-20 16:40:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:11,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649404228] [2024-06-20 16:40:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:12,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649404228] [2024-06-20 16:40:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649404228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:12,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643980317] [2024-06-20 16:40:12,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:12,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:12,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 557 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:12,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:12,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:12,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:12,733 INFO L124 PetriNetUnfolderBase]: 179/348 cut-off events. [2024-06-20 16:40:12,733 INFO L125 PetriNetUnfolderBase]: For 3630/3630 co-relation queries the response was YES. [2024-06-20 16:40:12,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1829 conditions, 348 events. 179/348 cut-off events. For 3630/3630 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1429 event pairs, 39 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 1792. Up to 305 conditions per place. [2024-06-20 16:40:12,735 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 60 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2024-06-20 16:40:12,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 719 flow [2024-06-20 16:40:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-20 16:40:12,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-20 16:40:12,736 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 557 flow. Second operand 8 states and 101 transitions. [2024-06-20 16:40:12,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 719 flow [2024-06-20 16:40:12,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 648 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 16:40:12,741 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 517 flow [2024-06-20 16:40:12,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=517, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2024-06-20 16:40:12,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2024-06-20 16:40:12,742 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 517 flow [2024-06-20 16:40:12,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:12,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:12,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:12,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:40:12,742 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)] === [2024-06-20 16:40:12,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash -571492193, now seen corresponding path program 1 times [2024-06-20 16:40:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152688817] [2024-06-20 16:40:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152688817] [2024-06-20 16:40:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152688817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:13,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:13,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787011563] [2024-06-20 16:40:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:13,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:13,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:13,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 517 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:13,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:13,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:13,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:14,007 INFO L124 PetriNetUnfolderBase]: 176/343 cut-off events. [2024-06-20 16:40:14,008 INFO L125 PetriNetUnfolderBase]: For 3745/3745 co-relation queries the response was YES. [2024-06-20 16:40:14,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1776 conditions, 343 events. 176/343 cut-off events. For 3745/3745 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1399 event pairs, 38 based on Foata normal form. 2/344 useless extension candidates. Maximal degree in co-relation 1737. Up to 294 conditions per place. [2024-06-20 16:40:14,010 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 61 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-20 16:40:14,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 79 transitions, 687 flow [2024-06-20 16:40:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-20 16:40:14,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-20 16:40:14,011 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 517 flow. Second operand 9 states and 111 transitions. [2024-06-20 16:40:14,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 79 transitions, 687 flow [2024-06-20 16:40:14,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 79 transitions, 655 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:14,018 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 517 flow [2024-06-20 16:40:14,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=517, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2024-06-20 16:40:14,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-20 16:40:14,019 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 517 flow [2024-06-20 16:40:14,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:14,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:14,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:14,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:40:14,020 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)] === [2024-06-20 16:40:14,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash -319541426, now seen corresponding path program 1 times [2024-06-20 16:40:14,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:14,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457629630] [2024-06-20 16:40:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:14,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:14,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457629630] [2024-06-20 16:40:14,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457629630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:14,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:14,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992419892] [2024-06-20 16:40:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:14,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 517 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:14,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:14,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:14,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:15,212 INFO L124 PetriNetUnfolderBase]: 179/350 cut-off events. [2024-06-20 16:40:15,213 INFO L125 PetriNetUnfolderBase]: For 3951/3951 co-relation queries the response was YES. [2024-06-20 16:40:15,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 350 events. 179/350 cut-off events. For 3951/3951 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1429 event pairs, 33 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 1793. Up to 288 conditions per place. [2024-06-20 16:40:15,215 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 65 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-06-20 16:40:15,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 735 flow [2024-06-20 16:40:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-20 16:40:15,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-20 16:40:15,216 INFO L175 Difference]: Start difference. First operand has 83 places, 70 transitions, 517 flow. Second operand 8 states and 107 transitions. [2024-06-20 16:40:15,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 735 flow [2024-06-20 16:40:15,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 698 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:15,221 INFO L231 Difference]: Finished difference. Result has 84 places, 72 transitions, 543 flow [2024-06-20 16:40:15,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=84, PETRI_TRANSITIONS=72} [2024-06-20 16:40:15,222 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-20 16:40:15,222 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 72 transitions, 543 flow [2024-06-20 16:40:15,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:15,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:15,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:15,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:40:15,223 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)] === [2024-06-20 16:40:15,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1002322150, now seen corresponding path program 2 times [2024-06-20 16:40:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:15,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646848575] [2024-06-20 16:40:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:16,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:16,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646848575] [2024-06-20 16:40:16,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646848575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:16,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:16,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:16,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154030230] [2024-06-20 16:40:16,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:16,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:16,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 72 transitions, 543 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:16,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:16,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:16,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:16,746 INFO L124 PetriNetUnfolderBase]: 182/357 cut-off events. [2024-06-20 16:40:16,746 INFO L125 PetriNetUnfolderBase]: For 4317/4317 co-relation queries the response was YES. [2024-06-20 16:40:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 357 events. 182/357 cut-off events. For 4317/4317 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1483 event pairs, 33 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1868. Up to 282 conditions per place. [2024-06-20 16:40:16,748 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 59 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-20 16:40:16,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 84 transitions, 771 flow [2024-06-20 16:40:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-20 16:40:16,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-20 16:40:16,750 INFO L175 Difference]: Start difference. First operand has 84 places, 72 transitions, 543 flow. Second operand 8 states and 106 transitions. [2024-06-20 16:40:16,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 84 transitions, 771 flow [2024-06-20 16:40:16,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 724 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:16,758 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 576 flow [2024-06-20 16:40:16,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-06-20 16:40:16,758 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-20 16:40:16,758 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 576 flow [2024-06-20 16:40:16,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:16,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:16,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:16,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:40:16,759 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)] === [2024-06-20 16:40:16,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash -171716500, now seen corresponding path program 1 times [2024-06-20 16:40:16,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:16,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803489912] [2024-06-20 16:40:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:16,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803489912] [2024-06-20 16:40:17,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803489912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:17,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:17,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276416423] [2024-06-20 16:40:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:17,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:17,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:17,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:17,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:17,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:17,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:17,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:17,718 INFO L124 PetriNetUnfolderBase]: 188/367 cut-off events. [2024-06-20 16:40:17,718 INFO L125 PetriNetUnfolderBase]: For 5092/5092 co-relation queries the response was YES. [2024-06-20 16:40:17,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 367 events. 188/367 cut-off events. For 5092/5092 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1514 event pairs, 32 based on Foata normal form. 2/368 useless extension candidates. Maximal degree in co-relation 1975. Up to 281 conditions per place. [2024-06-20 16:40:17,720 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 59 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-20 16:40:17,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 826 flow [2024-06-20 16:40:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-20 16:40:17,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-20 16:40:17,722 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 576 flow. Second operand 8 states and 108 transitions. [2024-06-20 16:40:17,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 826 flow [2024-06-20 16:40:17,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 87 transitions, 764 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:17,731 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 621 flow [2024-06-20 16:40:17,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=621, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-06-20 16:40:17,732 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-20 16:40:17,732 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 621 flow [2024-06-20 16:40:17,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:17,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:17,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:17,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:40:17,733 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)] === [2024-06-20 16:40:17,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:17,734 INFO L85 PathProgramCache]: Analyzing trace with hash -802633316, now seen corresponding path program 3 times [2024-06-20 16:40:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:17,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418576597] [2024-06-20 16:40:17,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:17,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:18,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418576597] [2024-06-20 16:40:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418576597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:18,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:18,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:18,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704402641] [2024-06-20 16:40:18,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:18,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:18,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:18,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 621 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:18,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:18,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:18,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:18,835 INFO L124 PetriNetUnfolderBase]: 191/372 cut-off events. [2024-06-20 16:40:18,835 INFO L125 PetriNetUnfolderBase]: For 5502/5502 co-relation queries the response was YES. [2024-06-20 16:40:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 372 events. 191/372 cut-off events. For 5502/5502 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1564 event pairs, 35 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 2077. Up to 296 conditions per place. [2024-06-20 16:40:18,837 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 64 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-20 16:40:18,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 879 flow [2024-06-20 16:40:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-20 16:40:18,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-20 16:40:18,841 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 621 flow. Second operand 8 states and 106 transitions. [2024-06-20 16:40:18,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 879 flow [2024-06-20 16:40:18,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 804 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:18,848 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 629 flow [2024-06-20 16:40:18,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=629, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-06-20 16:40:18,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-20 16:40:18,849 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 629 flow [2024-06-20 16:40:18,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:18,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:18,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:18,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:40:18,850 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)] === [2024-06-20 16:40:18,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash -545930996, now seen corresponding path program 4 times [2024-06-20 16:40:18,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:18,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609307907] [2024-06-20 16:40:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:18,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:19,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609307907] [2024-06-20 16:40:19,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609307907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:19,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:19,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607613728] [2024-06-20 16:40:19,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:19,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:19,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 629 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:19,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:19,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:19,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:20,214 INFO L124 PetriNetUnfolderBase]: 189/369 cut-off events. [2024-06-20 16:40:20,214 INFO L125 PetriNetUnfolderBase]: For 5653/5653 co-relation queries the response was YES. [2024-06-20 16:40:20,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2086 conditions, 369 events. 189/369 cut-off events. For 5653/5653 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1550 event pairs, 35 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 2042. Up to 267 conditions per place. [2024-06-20 16:40:20,217 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 55 selfloop transitions, 30 changer transitions 0/89 dead transitions. [2024-06-20 16:40:20,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 873 flow [2024-06-20 16:40:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:20,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-20 16:40:20,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-20 16:40:20,218 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 629 flow. Second operand 8 states and 106 transitions. [2024-06-20 16:40:20,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 873 flow [2024-06-20 16:40:20,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 806 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:20,224 INFO L231 Difference]: Finished difference. Result has 92 places, 81 transitions, 669 flow [2024-06-20 16:40:20,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=669, PETRI_PLACES=92, PETRI_TRANSITIONS=81} [2024-06-20 16:40:20,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-20 16:40:20,225 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 81 transitions, 669 flow [2024-06-20 16:40:20,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:20,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:20,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:20,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:40:20,225 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)] === [2024-06-20 16:40:20,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash -802423570, now seen corresponding path program 2 times [2024-06-20 16:40:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:20,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695902351] [2024-06-20 16:40:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:21,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:21,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695902351] [2024-06-20 16:40:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695902351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:21,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:21,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712075656] [2024-06-20 16:40:21,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:21,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:21,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 81 transitions, 669 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:21,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:21,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:21,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:21,502 INFO L124 PetriNetUnfolderBase]: 195/381 cut-off events. [2024-06-20 16:40:21,503 INFO L125 PetriNetUnfolderBase]: For 6505/6505 co-relation queries the response was YES. [2024-06-20 16:40:21,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 381 events. 195/381 cut-off events. For 6505/6505 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1622 event pairs, 35 based on Foata normal form. 2/381 useless extension candidates. Maximal degree in co-relation 2153. Up to 294 conditions per place. [2024-06-20 16:40:21,507 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 66 selfloop transitions, 24 changer transitions 0/94 dead transitions. [2024-06-20 16:40:21,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 94 transitions, 961 flow [2024-06-20 16:40:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-20 16:40:21,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-20 16:40:21,509 INFO L175 Difference]: Start difference. First operand has 92 places, 81 transitions, 669 flow. Second operand 9 states and 119 transitions. [2024-06-20 16:40:21,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 94 transitions, 961 flow [2024-06-20 16:40:21,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 94 transitions, 870 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:21,517 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 692 flow [2024-06-20 16:40:21,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=692, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-06-20 16:40:21,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-20 16:40:21,517 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 692 flow [2024-06-20 16:40:21,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:21,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:21,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:21,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:40:21,518 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)] === [2024-06-20 16:40:21,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 433262060, now seen corresponding path program 3 times [2024-06-20 16:40:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:21,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924787148] [2024-06-20 16:40:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924787148] [2024-06-20 16:40:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924787148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:22,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678724277] [2024-06-20 16:40:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:22,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:22,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:22,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:22,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 692 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:22,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:22,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:22,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:22,867 INFO L124 PetriNetUnfolderBase]: 198/388 cut-off events. [2024-06-20 16:40:22,867 INFO L125 PetriNetUnfolderBase]: For 6741/6741 co-relation queries the response was YES. [2024-06-20 16:40:22,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 388 events. 198/388 cut-off events. For 6741/6741 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1658 event pairs, 36 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 2213. Up to 329 conditions per place. [2024-06-20 16:40:22,870 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-20 16:40:22,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 95 transitions, 924 flow [2024-06-20 16:40:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:40:22,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:40:22,874 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 692 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:40:22,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 95 transitions, 924 flow [2024-06-20 16:40:22,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 95 transitions, 832 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:22,884 INFO L231 Difference]: Finished difference. Result has 98 places, 86 transitions, 674 flow [2024-06-20 16:40:22,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=674, PETRI_PLACES=98, PETRI_TRANSITIONS=86} [2024-06-20 16:40:22,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-20 16:40:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 86 transitions, 674 flow [2024-06-20 16:40:22,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:22,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:22,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:22,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:40:22,885 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)] === [2024-06-20 16:40:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 201147260, now seen corresponding path program 4 times [2024-06-20 16:40:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308044555] [2024-06-20 16:40:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:23,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:23,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308044555] [2024-06-20 16:40:23,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308044555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:23,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:23,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850112777] [2024-06-20 16:40:23,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:23,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:23,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 86 transitions, 674 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:23,916 INFO L124 PetriNetUnfolderBase]: 196/383 cut-off events. [2024-06-20 16:40:23,923 INFO L125 PetriNetUnfolderBase]: For 6902/6902 co-relation queries the response was YES. [2024-06-20 16:40:23,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2186 conditions, 383 events. 196/383 cut-off events. For 6902/6902 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1638 event pairs, 35 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 2139. Up to 242 conditions per place. [2024-06-20 16:40:23,927 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 50 selfloop transitions, 42 changer transitions 0/96 dead transitions. [2024-06-20 16:40:23,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 96 transitions, 932 flow [2024-06-20 16:40:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-20 16:40:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2024-06-20 16:40:23,941 INFO L175 Difference]: Start difference. First operand has 98 places, 86 transitions, 674 flow. Second operand 8 states and 111 transitions. [2024-06-20 16:40:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 96 transitions, 932 flow [2024-06-20 16:40:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 876 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:40:23,949 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 746 flow [2024-06-20 16:40:23,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=746, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2024-06-20 16:40:23,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-20 16:40:23,951 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 746 flow [2024-06-20 16:40:23,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:23,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:23,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:40:23,952 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)] === [2024-06-20 16:40:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -654883776, now seen corresponding path program 1 times [2024-06-20 16:40:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778773914] [2024-06-20 16:40:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:24,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778773914] [2024-06-20 16:40:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778773914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:24,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:24,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:24,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965356579] [2024-06-20 16:40:24,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:24,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:24,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 746 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:24,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:24,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:24,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:24,972 INFO L124 PetriNetUnfolderBase]: 200/391 cut-off events. [2024-06-20 16:40:24,972 INFO L125 PetriNetUnfolderBase]: For 7756/7756 co-relation queries the response was YES. [2024-06-20 16:40:24,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2305 conditions, 391 events. 200/391 cut-off events. For 7756/7756 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1664 event pairs, 13 based on Foata normal form. 2/392 useless extension candidates. Maximal degree in co-relation 2257. Up to 305 conditions per place. [2024-06-20 16:40:24,975 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 86 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-06-20 16:40:24,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 103 transitions, 992 flow [2024-06-20 16:40:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-20 16:40:24,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-20 16:40:24,977 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 746 flow. Second operand 8 states and 106 transitions. [2024-06-20 16:40:24,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 103 transitions, 992 flow [2024-06-20 16:40:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 103 transitions, 880 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:24,986 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 676 flow [2024-06-20 16:40:24,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2024-06-20 16:40:24,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-20 16:40:24,987 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 676 flow [2024-06-20 16:40:24,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:24,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:24,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:24,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:40:24,988 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)] === [2024-06-20 16:40:24,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1205625950, now seen corresponding path program 2 times [2024-06-20 16:40:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826459182] [2024-06-20 16:40:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:25,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:25,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826459182] [2024-06-20 16:40:25,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826459182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:25,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636455309] [2024-06-20 16:40:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:25,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:25,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:25,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:25,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:25,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:25,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 676 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:25,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:25,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:25,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:26,116 INFO L124 PetriNetUnfolderBase]: 211/418 cut-off events. [2024-06-20 16:40:26,116 INFO L125 PetriNetUnfolderBase]: For 7733/7733 co-relation queries the response was YES. [2024-06-20 16:40:26,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2308 conditions, 418 events. 211/418 cut-off events. For 7733/7733 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1859 event pairs, 28 based on Foata normal form. 2/417 useless extension candidates. Maximal degree in co-relation 2259. Up to 340 conditions per place. [2024-06-20 16:40:26,119 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 85 selfloop transitions, 18 changer transitions 0/107 dead transitions. [2024-06-20 16:40:26,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 970 flow [2024-06-20 16:40:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-20 16:40:26,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-20 16:40:26,120 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 676 flow. Second operand 9 states and 116 transitions. [2024-06-20 16:40:26,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 107 transitions, 970 flow [2024-06-20 16:40:26,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 930 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:26,130 INFO L231 Difference]: Finished difference. Result has 106 places, 97 transitions, 759 flow [2024-06-20 16:40:26,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=759, PETRI_PLACES=106, PETRI_TRANSITIONS=97} [2024-06-20 16:40:26,131 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-20 16:40:26,131 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 97 transitions, 759 flow [2024-06-20 16:40:26,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:26,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:26,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:26,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:40:26,131 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)] === [2024-06-20 16:40:26,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash -969291374, now seen corresponding path program 3 times [2024-06-20 16:40:26,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:26,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054765627] [2024-06-20 16:40:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:26,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:26,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054765627] [2024-06-20 16:40:26,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054765627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:26,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:26,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:26,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065172503] [2024-06-20 16:40:26,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:26,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:26,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 97 transitions, 759 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:26,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:26,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:26,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:27,096 INFO L124 PetriNetUnfolderBase]: 215/428 cut-off events. [2024-06-20 16:40:27,096 INFO L125 PetriNetUnfolderBase]: For 8309/8309 co-relation queries the response was YES. [2024-06-20 16:40:27,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 428 events. 215/428 cut-off events. For 8309/8309 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1906 event pairs, 18 based on Foata normal form. 2/429 useless extension candidates. Maximal degree in co-relation 2335. Up to 351 conditions per place. [2024-06-20 16:40:27,103 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 89 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-20 16:40:27,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 111 transitions, 1055 flow [2024-06-20 16:40:27,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-20 16:40:27,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:27,104 INFO L175 Difference]: Start difference. First operand has 106 places, 97 transitions, 759 flow. Second operand 8 states and 104 transitions. [2024-06-20 16:40:27,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 111 transitions, 1055 flow [2024-06-20 16:40:27,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 1031 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 16:40:27,115 INFO L231 Difference]: Finished difference. Result has 113 places, 101 transitions, 843 flow [2024-06-20 16:40:27,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=843, PETRI_PLACES=113, PETRI_TRANSITIONS=101} [2024-06-20 16:40:27,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 83 predicate places. [2024-06-20 16:40:27,118 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 101 transitions, 843 flow [2024-06-20 16:40:27,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:27,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:27,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:27,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:40:27,119 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)] === [2024-06-20 16:40:27,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1200378204, now seen corresponding path program 1 times [2024-06-20 16:40:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:27,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167432430] [2024-06-20 16:40:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:27,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167432430] [2024-06-20 16:40:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167432430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:28,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:28,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:28,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284066361] [2024-06-20 16:40:28,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:28,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:28,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:28,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:28,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 101 transitions, 843 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:28,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:28,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:28,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:28,372 INFO L124 PetriNetUnfolderBase]: 231/456 cut-off events. [2024-06-20 16:40:28,373 INFO L125 PetriNetUnfolderBase]: For 9992/9992 co-relation queries the response was YES. [2024-06-20 16:40:28,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 456 events. 231/456 cut-off events. For 9992/9992 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2075 event pairs, 23 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 2667. Up to 335 conditions per place. [2024-06-20 16:40:28,382 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-20 16:40:28,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 118 transitions, 1255 flow [2024-06-20 16:40:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:28,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-20 16:40:28,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-20 16:40:28,383 INFO L175 Difference]: Start difference. First operand has 113 places, 101 transitions, 843 flow. Second operand 9 states and 121 transitions. [2024-06-20 16:40:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 118 transitions, 1255 flow [2024-06-20 16:40:28,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 1190 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:28,397 INFO L231 Difference]: Finished difference. Result has 117 places, 106 transitions, 949 flow [2024-06-20 16:40:28,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=949, PETRI_PLACES=117, PETRI_TRANSITIONS=106} [2024-06-20 16:40:28,397 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 87 predicate places. [2024-06-20 16:40:28,397 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 106 transitions, 949 flow [2024-06-20 16:40:28,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:28,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:28,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:40:28,398 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)] === [2024-06-20 16:40:28,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash -835319584, now seen corresponding path program 2 times [2024-06-20 16:40:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:28,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899347562] [2024-06-20 16:40:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:29,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:29,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899347562] [2024-06-20 16:40:29,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899347562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:29,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:29,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928900357] [2024-06-20 16:40:29,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:29,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:29,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:29,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 106 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:29,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:29,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:29,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:30,089 INFO L124 PetriNetUnfolderBase]: 229/451 cut-off events. [2024-06-20 16:40:30,089 INFO L125 PetriNetUnfolderBase]: For 10072/10072 co-relation queries the response was YES. [2024-06-20 16:40:30,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 451 events. 229/451 cut-off events. For 10072/10072 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2037 event pairs, 19 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 2649. Up to 349 conditions per place. [2024-06-20 16:40:30,092 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 86 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-20 16:40:30,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 119 transitions, 1280 flow [2024-06-20 16:40:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-20 16:40:30,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-20 16:40:30,094 INFO L175 Difference]: Start difference. First operand has 117 places, 106 transitions, 949 flow. Second operand 9 states and 119 transitions. [2024-06-20 16:40:30,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 119 transitions, 1280 flow [2024-06-20 16:40:30,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 119 transitions, 1171 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:30,110 INFO L231 Difference]: Finished difference. Result has 122 places, 109 transitions, 993 flow [2024-06-20 16:40:30,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=993, PETRI_PLACES=122, PETRI_TRANSITIONS=109} [2024-06-20 16:40:30,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-20 16:40:30,111 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 109 transitions, 993 flow [2024-06-20 16:40:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:30,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:30,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:30,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:40:30,112 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)] === [2024-06-20 16:40:30,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:30,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1122678978, now seen corresponding path program 3 times [2024-06-20 16:40:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:30,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684987907] [2024-06-20 16:40:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:30,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:31,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:31,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684987907] [2024-06-20 16:40:31,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684987907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:31,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:31,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760128468] [2024-06-20 16:40:31,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:31,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:31,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:31,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 109 transitions, 993 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:31,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:31,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:31,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:31,346 INFO L124 PetriNetUnfolderBase]: 235/461 cut-off events. [2024-06-20 16:40:31,347 INFO L125 PetriNetUnfolderBase]: For 11000/11000 co-relation queries the response was YES. [2024-06-20 16:40:31,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 461 events. 235/461 cut-off events. For 11000/11000 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2083 event pairs, 19 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 2761. Up to 373 conditions per place. [2024-06-20 16:40:31,350 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 97 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-20 16:40:31,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 124 transitions, 1323 flow [2024-06-20 16:40:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-20 16:40:31,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-20 16:40:31,351 INFO L175 Difference]: Start difference. First operand has 122 places, 109 transitions, 993 flow. Second operand 9 states and 119 transitions. [2024-06-20 16:40:31,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 124 transitions, 1323 flow [2024-06-20 16:40:31,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 1239 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:31,366 INFO L231 Difference]: Finished difference. Result has 125 places, 111 transitions, 1010 flow [2024-06-20 16:40:31,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1010, PETRI_PLACES=125, PETRI_TRANSITIONS=111} [2024-06-20 16:40:31,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-20 16:40:31,367 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 111 transitions, 1010 flow [2024-06-20 16:40:31,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:31,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:31,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:31,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:40:31,367 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)] === [2024-06-20 16:40:31,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash 925000864, now seen corresponding path program 1 times [2024-06-20 16:40:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:31,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708685647] [2024-06-20 16:40:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:31,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:32,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:32,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708685647] [2024-06-20 16:40:32,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708685647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:32,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:32,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:32,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109776652] [2024-06-20 16:40:32,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:32,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:32,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:32,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 111 transitions, 1010 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:32,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:32,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:32,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:32,446 INFO L124 PetriNetUnfolderBase]: 255/505 cut-off events. [2024-06-20 16:40:32,446 INFO L125 PetriNetUnfolderBase]: For 16203/16203 co-relation queries the response was YES. [2024-06-20 16:40:32,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3082 conditions, 505 events. 255/505 cut-off events. For 16203/16203 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2360 event pairs, 32 based on Foata normal form. 12/516 useless extension candidates. Maximal degree in co-relation 3021. Up to 360 conditions per place. [2024-06-20 16:40:32,449 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 27 changer transitions 6/128 dead transitions. [2024-06-20 16:40:32,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 128 transitions, 1378 flow [2024-06-20 16:40:32,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-20 16:40:32,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-20 16:40:32,450 INFO L175 Difference]: Start difference. First operand has 125 places, 111 transitions, 1010 flow. Second operand 10 states and 134 transitions. [2024-06-20 16:40:32,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 128 transitions, 1378 flow [2024-06-20 16:40:32,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 128 transitions, 1297 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:32,466 INFO L231 Difference]: Finished difference. Result has 128 places, 110 transitions, 998 flow [2024-06-20 16:40:32,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=998, PETRI_PLACES=128, PETRI_TRANSITIONS=110} [2024-06-20 16:40:32,467 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-20 16:40:32,467 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 110 transitions, 998 flow [2024-06-20 16:40:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:32,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:32,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:32,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:40:32,467 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)] === [2024-06-20 16:40:32,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:32,468 INFO L85 PathProgramCache]: Analyzing trace with hash 887993790, now seen corresponding path program 4 times [2024-06-20 16:40:32,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:32,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378193915] [2024-06-20 16:40:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:32,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:33,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:33,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378193915] [2024-06-20 16:40:33,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378193915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:33,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127337681] [2024-06-20 16:40:33,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:33,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:33,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:33,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:33,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 110 transitions, 998 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:33,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:33,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:33,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:33,253 INFO L124 PetriNetUnfolderBase]: 247/491 cut-off events. [2024-06-20 16:40:33,254 INFO L125 PetriNetUnfolderBase]: For 12586/12586 co-relation queries the response was YES. [2024-06-20 16:40:33,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3002 conditions, 491 events. 247/491 cut-off events. For 12586/12586 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2293 event pairs, 35 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2940. Up to 409 conditions per place. [2024-06-20 16:40:33,257 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 96 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-20 16:40:33,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 121 transitions, 1301 flow [2024-06-20 16:40:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:40:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:40:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-20 16:40:33,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:33,259 INFO L175 Difference]: Start difference. First operand has 128 places, 110 transitions, 998 flow. Second operand 8 states and 104 transitions. [2024-06-20 16:40:33,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 121 transitions, 1301 flow [2024-06-20 16:40:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 121 transitions, 1233 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 16:40:33,278 INFO L231 Difference]: Finished difference. Result has 129 places, 113 transitions, 1034 flow [2024-06-20 16:40:33,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1034, PETRI_PLACES=129, PETRI_TRANSITIONS=113} [2024-06-20 16:40:33,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2024-06-20 16:40:33,278 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 113 transitions, 1034 flow [2024-06-20 16:40:33,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:33,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:33,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:33,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:40:33,279 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)] === [2024-06-20 16:40:33,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 894427840, now seen corresponding path program 4 times [2024-06-20 16:40:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049656502] [2024-06-20 16:40:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:34,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:34,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049656502] [2024-06-20 16:40:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049656502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:34,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:34,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847172946] [2024-06-20 16:40:34,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:34,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:34,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:34,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:34,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 113 transitions, 1034 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:34,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:34,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:34,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:34,775 INFO L124 PetriNetUnfolderBase]: 265/530 cut-off events. [2024-06-20 16:40:34,775 INFO L125 PetriNetUnfolderBase]: For 15482/15482 co-relation queries the response was YES. [2024-06-20 16:40:34,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 530 events. 265/530 cut-off events. For 15482/15482 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2559 event pairs, 35 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 3344. Up to 405 conditions per place. [2024-06-20 16:40:34,779 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 37 changer transitions 0/130 dead transitions. [2024-06-20 16:40:34,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 130 transitions, 1598 flow [2024-06-20 16:40:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-20 16:40:34,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-20 16:40:34,780 INFO L175 Difference]: Start difference. First operand has 129 places, 113 transitions, 1034 flow. Second operand 10 states and 133 transitions. [2024-06-20 16:40:34,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 130 transitions, 1598 flow [2024-06-20 16:40:34,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 130 transitions, 1520 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:34,802 INFO L231 Difference]: Finished difference. Result has 134 places, 120 transitions, 1203 flow [2024-06-20 16:40:34,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1203, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2024-06-20 16:40:34,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-20 16:40:34,803 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 1203 flow [2024-06-20 16:40:34,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:34,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:34,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:34,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:40:34,803 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)] === [2024-06-20 16:40:34,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:34,803 INFO L85 PathProgramCache]: Analyzing trace with hash 541346078, now seen corresponding path program 5 times [2024-06-20 16:40:34,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:34,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005634086] [2024-06-20 16:40:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:34,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:35,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:35,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005634086] [2024-06-20 16:40:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005634086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:35,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:35,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:35,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396629279] [2024-06-20 16:40:35,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:35,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:35,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:35,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 1203 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:35,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:35,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:35,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:36,163 INFO L124 PetriNetUnfolderBase]: 276/553 cut-off events. [2024-06-20 16:40:36,164 INFO L125 PetriNetUnfolderBase]: For 18154/18154 co-relation queries the response was YES. [2024-06-20 16:40:36,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3706 conditions, 553 events. 276/553 cut-off events. For 18154/18154 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2700 event pairs, 41 based on Foata normal form. 2/554 useless extension candidates. Maximal degree in co-relation 3641. Up to 464 conditions per place. [2024-06-20 16:40:36,167 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2024-06-20 16:40:36,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 134 transitions, 1673 flow [2024-06-20 16:40:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:40:36,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:36,169 INFO L175 Difference]: Start difference. First operand has 134 places, 120 transitions, 1203 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:40:36,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 134 transitions, 1673 flow [2024-06-20 16:40:36,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 134 transitions, 1588 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:36,190 INFO L231 Difference]: Finished difference. Result has 138 places, 125 transitions, 1295 flow [2024-06-20 16:40:36,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1295, PETRI_PLACES=138, PETRI_TRANSITIONS=125} [2024-06-20 16:40:36,191 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-20 16:40:36,191 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 125 transitions, 1295 flow [2024-06-20 16:40:36,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:36,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:36,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:40:36,192 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)] === [2024-06-20 16:40:36,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 256246208, now seen corresponding path program 6 times [2024-06-20 16:40:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025634205] [2024-06-20 16:40:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:37,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:37,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025634205] [2024-06-20 16:40:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025634205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:37,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:37,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:37,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890954972] [2024-06-20 16:40:37,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:37,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:37,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:37,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:37,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:37,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:37,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 125 transitions, 1295 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:37,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:37,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:37,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:37,423 INFO L124 PetriNetUnfolderBase]: 282/558 cut-off events. [2024-06-20 16:40:37,423 INFO L125 PetriNetUnfolderBase]: For 19424/19424 co-relation queries the response was YES. [2024-06-20 16:40:37,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 558 events. 282/558 cut-off events. For 19424/19424 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2716 event pairs, 33 based on Foata normal form. 2/558 useless extension candidates. Maximal degree in co-relation 3785. Up to 329 conditions per place. [2024-06-20 16:40:37,427 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 80 selfloop transitions, 58 changer transitions 0/142 dead transitions. [2024-06-20 16:40:37,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 142 transitions, 1951 flow [2024-06-20 16:40:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-20 16:40:37,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45878136200716846 [2024-06-20 16:40:37,428 INFO L175 Difference]: Start difference. First operand has 138 places, 125 transitions, 1295 flow. Second operand 9 states and 128 transitions. [2024-06-20 16:40:37,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 142 transitions, 1951 flow [2024-06-20 16:40:37,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 142 transitions, 1861 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:37,455 INFO L231 Difference]: Finished difference. Result has 142 places, 130 transitions, 1468 flow [2024-06-20 16:40:37,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1468, PETRI_PLACES=142, PETRI_TRANSITIONS=130} [2024-06-20 16:40:37,456 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-20 16:40:37,456 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 130 transitions, 1468 flow [2024-06-20 16:40:37,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:37,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:37,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:37,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:40:37,457 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)] === [2024-06-20 16:40:37,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:37,457 INFO L85 PathProgramCache]: Analyzing trace with hash 256009058, now seen corresponding path program 7 times [2024-06-20 16:40:37,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:37,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354191535] [2024-06-20 16:40:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:37,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:38,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:38,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354191535] [2024-06-20 16:40:38,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354191535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:38,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:38,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:38,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896456403] [2024-06-20 16:40:38,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:38,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:38,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:38,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:38,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 130 transitions, 1468 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:38,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:38,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:38,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:39,150 INFO L124 PetriNetUnfolderBase]: 280/555 cut-off events. [2024-06-20 16:40:39,150 INFO L125 PetriNetUnfolderBase]: For 19243/19243 co-relation queries the response was YES. [2024-06-20 16:40:39,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3862 conditions, 555 events. 280/555 cut-off events. For 19243/19243 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2696 event pairs, 31 based on Foata normal form. 1/553 useless extension candidates. Maximal degree in co-relation 3793. Up to 387 conditions per place. [2024-06-20 16:40:39,154 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 90 selfloop transitions, 50 changer transitions 0/144 dead transitions. [2024-06-20 16:40:39,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 144 transitions, 1980 flow [2024-06-20 16:40:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-20 16:40:39,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-20 16:40:39,155 INFO L175 Difference]: Start difference. First operand has 142 places, 130 transitions, 1468 flow. Second operand 9 states and 121 transitions. [2024-06-20 16:40:39,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 144 transitions, 1980 flow [2024-06-20 16:40:39,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 144 transitions, 1755 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:39,187 INFO L231 Difference]: Finished difference. Result has 146 places, 135 transitions, 1535 flow [2024-06-20 16:40:39,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1535, PETRI_PLACES=146, PETRI_TRANSITIONS=135} [2024-06-20 16:40:39,187 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2024-06-20 16:40:39,187 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 135 transitions, 1535 flow [2024-06-20 16:40:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:39,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:39,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:39,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:40:39,188 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)] === [2024-06-20 16:40:39,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:39,188 INFO L85 PathProgramCache]: Analyzing trace with hash 556112802, now seen corresponding path program 8 times [2024-06-20 16:40:39,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:39,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323821698] [2024-06-20 16:40:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:39,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:40,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:40,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323821698] [2024-06-20 16:40:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323821698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:40,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:40,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:40,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975981970] [2024-06-20 16:40:40,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:40,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:40,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:40,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:40,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:40,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 135 transitions, 1535 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:40,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:40,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:40,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:40,503 INFO L124 PetriNetUnfolderBase]: 276/549 cut-off events. [2024-06-20 16:40:40,503 INFO L125 PetriNetUnfolderBase]: For 18647/18647 co-relation queries the response was YES. [2024-06-20 16:40:40,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3685 conditions, 549 events. 276/549 cut-off events. For 18647/18647 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2658 event pairs, 31 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 3614. Up to 427 conditions per place. [2024-06-20 16:40:40,507 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 35 changer transitions 0/144 dead transitions. [2024-06-20 16:40:40,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 144 transitions, 1907 flow [2024-06-20 16:40:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-20 16:40:40,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-20 16:40:40,508 INFO L175 Difference]: Start difference. First operand has 146 places, 135 transitions, 1535 flow. Second operand 9 states and 121 transitions. [2024-06-20 16:40:40,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 144 transitions, 1907 flow [2024-06-20 16:40:40,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 144 transitions, 1723 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:40,535 INFO L231 Difference]: Finished difference. Result has 150 places, 135 transitions, 1429 flow [2024-06-20 16:40:40,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1429, PETRI_PLACES=150, PETRI_TRANSITIONS=135} [2024-06-20 16:40:40,536 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-20 16:40:40,536 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 135 transitions, 1429 flow [2024-06-20 16:40:40,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:40,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:40,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:40,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:40:40,537 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)] === [2024-06-20 16:40:40,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:40,537 INFO L85 PathProgramCache]: Analyzing trace with hash 894673918, now seen corresponding path program 2 times [2024-06-20 16:40:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:40,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025563458] [2024-06-20 16:40:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025563458] [2024-06-20 16:40:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025563458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:41,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:41,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:41,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400871858] [2024-06-20 16:40:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:41,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:41,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:41,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 135 transitions, 1429 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:41,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:41,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:41,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:41,892 INFO L124 PetriNetUnfolderBase]: 296/593 cut-off events. [2024-06-20 16:40:41,892 INFO L125 PetriNetUnfolderBase]: For 25874/25874 co-relation queries the response was YES. [2024-06-20 16:40:41,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3870 conditions, 593 events. 296/593 cut-off events. For 25874/25874 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2933 event pairs, 35 based on Foata normal form. 12/602 useless extension candidates. Maximal degree in co-relation 3798. Up to 445 conditions per place. [2024-06-20 16:40:41,896 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 28 changer transitions 3/149 dead transitions. [2024-06-20 16:40:41,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 149 transitions, 1847 flow [2024-06-20 16:40:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-20 16:40:41,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-20 16:40:41,925 INFO L175 Difference]: Start difference. First operand has 150 places, 135 transitions, 1429 flow. Second operand 9 states and 123 transitions. [2024-06-20 16:40:41,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 149 transitions, 1847 flow [2024-06-20 16:40:41,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 149 transitions, 1775 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:41,957 INFO L231 Difference]: Finished difference. Result has 152 places, 136 transitions, 1467 flow [2024-06-20 16:40:41,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1467, PETRI_PLACES=152, PETRI_TRANSITIONS=136} [2024-06-20 16:40:41,957 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-20 16:40:41,958 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 136 transitions, 1467 flow [2024-06-20 16:40:41,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:41,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:41,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:41,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:40:41,958 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)] === [2024-06-20 16:40:41,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash 256255136, now seen corresponding path program 3 times [2024-06-20 16:40:41,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:41,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101294961] [2024-06-20 16:40:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:42,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:42,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101294961] [2024-06-20 16:40:42,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101294961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:42,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:42,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:42,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709880686] [2024-06-20 16:40:42,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:42,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:42,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:42,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:42,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:43,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:43,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 136 transitions, 1467 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:43,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:43,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:43,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:43,221 INFO L124 PetriNetUnfolderBase]: 294/591 cut-off events. [2024-06-20 16:40:43,222 INFO L125 PetriNetUnfolderBase]: For 21079/21079 co-relation queries the response was YES. [2024-06-20 16:40:43,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3912 conditions, 591 events. 294/591 cut-off events. For 21079/21079 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2940 event pairs, 35 based on Foata normal form. 2/590 useless extension candidates. Maximal degree in co-relation 3839. Up to 447 conditions per place. [2024-06-20 16:40:43,225 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 102 selfloop transitions, 41 changer transitions 0/147 dead transitions. [2024-06-20 16:40:43,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 147 transitions, 1807 flow [2024-06-20 16:40:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:43,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-20 16:40:43,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:43,249 INFO L175 Difference]: Start difference. First operand has 152 places, 136 transitions, 1467 flow. Second operand 10 states and 130 transitions. [2024-06-20 16:40:43,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 147 transitions, 1807 flow [2024-06-20 16:40:43,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 147 transitions, 1725 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:43,282 INFO L231 Difference]: Finished difference. Result has 155 places, 137 transitions, 1505 flow [2024-06-20 16:40:43,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1505, PETRI_PLACES=155, PETRI_TRANSITIONS=137} [2024-06-20 16:40:43,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-20 16:40:43,283 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 137 transitions, 1505 flow [2024-06-20 16:40:43,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:43,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:43,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:43,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:40:43,284 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)] === [2024-06-20 16:40:43,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:43,284 INFO L85 PathProgramCache]: Analyzing trace with hash 541355006, now seen corresponding path program 4 times [2024-06-20 16:40:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903328709] [2024-06-20 16:40:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:44,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:44,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903328709] [2024-06-20 16:40:44,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903328709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:44,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:44,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836433883] [2024-06-20 16:40:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:44,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:44,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 137 transitions, 1505 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:44,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:44,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:44,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:44,712 INFO L124 PetriNetUnfolderBase]: 301/609 cut-off events. [2024-06-20 16:40:44,713 INFO L125 PetriNetUnfolderBase]: For 21082/21082 co-relation queries the response was YES. [2024-06-20 16:40:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4016 conditions, 609 events. 301/609 cut-off events. For 21082/21082 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3084 event pairs, 46 based on Foata normal form. 2/610 useless extension candidates. Maximal degree in co-relation 3942. Up to 529 conditions per place. [2024-06-20 16:40:44,717 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 130 selfloop transitions, 16 changer transitions 0/150 dead transitions. [2024-06-20 16:40:44,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 1866 flow [2024-06-20 16:40:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:40:44,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:40:44,733 INFO L175 Difference]: Start difference. First operand has 155 places, 137 transitions, 1505 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:40:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 1866 flow [2024-06-20 16:40:44,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 150 transitions, 1750 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-20 16:40:44,775 INFO L231 Difference]: Finished difference. Result has 157 places, 140 transitions, 1481 flow [2024-06-20 16:40:44,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1481, PETRI_PLACES=157, PETRI_TRANSITIONS=140} [2024-06-20 16:40:44,777 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-20 16:40:44,777 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 140 transitions, 1481 flow [2024-06-20 16:40:44,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:44,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:44,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:44,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:40:44,782 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)] === [2024-06-20 16:40:44,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:44,783 INFO L85 PathProgramCache]: Analyzing trace with hash 551830526, now seen corresponding path program 5 times [2024-06-20 16:40:44,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:44,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576746256] [2024-06-20 16:40:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:44,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:45,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:45,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576746256] [2024-06-20 16:40:45,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576746256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:45,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:45,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956354739] [2024-06-20 16:40:45,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:45,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:45,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:45,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:45,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 140 transitions, 1481 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:45,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:45,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:45,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:45,729 INFO L124 PetriNetUnfolderBase]: 305/619 cut-off events. [2024-06-20 16:40:45,729 INFO L125 PetriNetUnfolderBase]: For 22154/22154 co-relation queries the response was YES. [2024-06-20 16:40:45,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4022 conditions, 619 events. 305/619 cut-off events. For 22154/22154 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3158 event pairs, 43 based on Foata normal form. 2/620 useless extension candidates. Maximal degree in co-relation 3947. Up to 508 conditions per place. [2024-06-20 16:40:45,734 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 128 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-20 16:40:45,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 153 transitions, 1921 flow [2024-06-20 16:40:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-20 16:40:45,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-20 16:40:45,735 INFO L175 Difference]: Start difference. First operand has 157 places, 140 transitions, 1481 flow. Second operand 10 states and 126 transitions. [2024-06-20 16:40:45,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 153 transitions, 1921 flow [2024-06-20 16:40:45,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 153 transitions, 1862 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:45,777 INFO L231 Difference]: Finished difference. Result has 160 places, 141 transitions, 1504 flow [2024-06-20 16:40:45,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1504, PETRI_PLACES=160, PETRI_TRANSITIONS=141} [2024-06-20 16:40:45,778 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-20 16:40:45,778 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 141 transitions, 1504 flow [2024-06-20 16:40:45,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:45,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:45,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:40:45,779 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)] === [2024-06-20 16:40:45,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:45,779 INFO L85 PathProgramCache]: Analyzing trace with hash 551474336, now seen corresponding path program 6 times [2024-06-20 16:40:45,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:45,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704372645] [2024-06-20 16:40:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:46,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:46,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704372645] [2024-06-20 16:40:46,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704372645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:46,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:46,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:46,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065587670] [2024-06-20 16:40:46,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:46,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:46,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:46,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:46,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 141 transitions, 1504 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:46,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:46,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:46,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:46,750 INFO L124 PetriNetUnfolderBase]: 302/612 cut-off events. [2024-06-20 16:40:46,750 INFO L125 PetriNetUnfolderBase]: For 20942/20942 co-relation queries the response was YES. [2024-06-20 16:40:46,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3875 conditions, 612 events. 302/612 cut-off events. For 20942/20942 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3097 event pairs, 44 based on Foata normal form. 2/613 useless extension candidates. Maximal degree in co-relation 3799. Up to 520 conditions per place. [2024-06-20 16:40:46,755 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 127 selfloop transitions, 19 changer transitions 0/150 dead transitions. [2024-06-20 16:40:46,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 150 transitions, 1816 flow [2024-06-20 16:40:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-20 16:40:46,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-20 16:40:46,770 INFO L175 Difference]: Start difference. First operand has 160 places, 141 transitions, 1504 flow. Second operand 9 states and 114 transitions. [2024-06-20 16:40:46,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 150 transitions, 1816 flow [2024-06-20 16:40:46,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 150 transitions, 1695 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-06-20 16:40:46,809 INFO L231 Difference]: Finished difference. Result has 158 places, 141 transitions, 1427 flow [2024-06-20 16:40:46,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1427, PETRI_PLACES=158, PETRI_TRANSITIONS=141} [2024-06-20 16:40:46,810 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-20 16:40:46,810 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 141 transitions, 1427 flow [2024-06-20 16:40:46,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:46,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:46,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:46,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:40:46,811 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)] === [2024-06-20 16:40:46,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash -993274462, now seen corresponding path program 5 times [2024-06-20 16:40:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:46,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690378600] [2024-06-20 16:40:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:46,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:47,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:47,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690378600] [2024-06-20 16:40:47,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690378600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:47,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:47,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:47,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727859448] [2024-06-20 16:40:47,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:47,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:47,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:47,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:47,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:47,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:47,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 141 transitions, 1427 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:47,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:47,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:47,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:47,822 INFO L124 PetriNetUnfolderBase]: 313/634 cut-off events. [2024-06-20 16:40:47,822 INFO L125 PetriNetUnfolderBase]: For 20563/20563 co-relation queries the response was YES. [2024-06-20 16:40:47,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3832 conditions, 634 events. 313/634 cut-off events. For 20563/20563 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3242 event pairs, 38 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3759. Up to 548 conditions per place. [2024-06-20 16:40:47,827 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 139 selfloop transitions, 16 changer transitions 0/159 dead transitions. [2024-06-20 16:40:47,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 159 transitions, 1817 flow [2024-06-20 16:40:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:40:47,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:47,828 INFO L175 Difference]: Start difference. First operand has 158 places, 141 transitions, 1427 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:40:47,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 159 transitions, 1817 flow [2024-06-20 16:40:47,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 159 transitions, 1775 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:40:47,865 INFO L231 Difference]: Finished difference. Result has 161 places, 146 transitions, 1483 flow [2024-06-20 16:40:47,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1483, PETRI_PLACES=161, PETRI_TRANSITIONS=146} [2024-06-20 16:40:47,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-20 16:40:47,865 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 146 transitions, 1483 flow [2024-06-20 16:40:47,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:47,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:47,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:47,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:40:47,866 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)] === [2024-06-20 16:40:47,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1608539338, now seen corresponding path program 6 times [2024-06-20 16:40:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:47,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56186698] [2024-06-20 16:40:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:48,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56186698] [2024-06-20 16:40:48,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56186698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:48,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:48,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:40:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23503951] [2024-06-20 16:40:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:48,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:40:48,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:40:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:40:48,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:48,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 146 transitions, 1483 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:48,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:48,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:48,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:48,854 INFO L124 PetriNetUnfolderBase]: 310/629 cut-off events. [2024-06-20 16:40:48,855 INFO L125 PetriNetUnfolderBase]: For 18873/18873 co-relation queries the response was YES. [2024-06-20 16:40:48,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 629 events. 310/629 cut-off events. For 18873/18873 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3218 event pairs, 34 based on Foata normal form. 2/630 useless extension candidates. Maximal degree in co-relation 3667. Up to 532 conditions per place. [2024-06-20 16:40:48,858 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 135 selfloop transitions, 21 changer transitions 0/160 dead transitions. [2024-06-20 16:40:48,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 160 transitions, 1831 flow [2024-06-20 16:40:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-20 16:40:48,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-20 16:40:48,860 INFO L175 Difference]: Start difference. First operand has 161 places, 146 transitions, 1483 flow. Second operand 9 states and 119 transitions. [2024-06-20 16:40:48,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 160 transitions, 1831 flow [2024-06-20 16:40:48,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 160 transitions, 1787 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 16:40:48,897 INFO L231 Difference]: Finished difference. Result has 165 places, 146 transitions, 1485 flow [2024-06-20 16:40:48,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1485, PETRI_PLACES=165, PETRI_TRANSITIONS=146} [2024-06-20 16:40:48,897 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-20 16:40:48,898 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 146 transitions, 1485 flow [2024-06-20 16:40:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:48,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:48,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:48,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:40:48,899 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)] === [2024-06-20 16:40:48,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:48,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1164256147, now seen corresponding path program 1 times [2024-06-20 16:40:48,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:48,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927277494] [2024-06-20 16:40:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:48,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:49,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:49,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927277494] [2024-06-20 16:40:49,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927277494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:49,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:49,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:49,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180664427] [2024-06-20 16:40:49,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:49,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:49,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:49,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:49,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:49,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:49,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 146 transitions, 1485 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:49,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:49,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:49,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:50,140 INFO L124 PetriNetUnfolderBase]: 314/637 cut-off events. [2024-06-20 16:40:50,140 INFO L125 PetriNetUnfolderBase]: For 19798/19798 co-relation queries the response was YES. [2024-06-20 16:40:50,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 637 events. 314/637 cut-off events. For 19798/19798 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3283 event pairs, 35 based on Foata normal form. 2/638 useless extension candidates. Maximal degree in co-relation 3710. Up to 539 conditions per place. [2024-06-20 16:40:50,144 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 134 selfloop transitions, 20 changer transitions 2/160 dead transitions. [2024-06-20 16:40:50,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 160 transitions, 1861 flow [2024-06-20 16:40:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:40:50,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-20 16:40:50,145 INFO L175 Difference]: Start difference. First operand has 165 places, 146 transitions, 1485 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:40:50,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 160 transitions, 1861 flow [2024-06-20 16:40:50,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 160 transitions, 1738 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-20 16:40:50,182 INFO L231 Difference]: Finished difference. Result has 163 places, 147 transitions, 1431 flow [2024-06-20 16:40:50,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1431, PETRI_PLACES=163, PETRI_TRANSITIONS=147} [2024-06-20 16:40:50,183 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-20 16:40:50,183 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 147 transitions, 1431 flow [2024-06-20 16:40:50,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:50,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:50,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:50,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:40:50,184 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)] === [2024-06-20 16:40:50,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:50,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1164404017, now seen corresponding path program 2 times [2024-06-20 16:40:50,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:50,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090564636] [2024-06-20 16:40:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:50,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:51,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090564636] [2024-06-20 16:40:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090564636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:51,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:51,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368025569] [2024-06-20 16:40:51,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:51,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:51,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:51,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:51,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 147 transitions, 1431 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:51,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:51,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:51,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:51,325 INFO L124 PetriNetUnfolderBase]: 304/615 cut-off events. [2024-06-20 16:40:51,325 INFO L125 PetriNetUnfolderBase]: For 20104/20104 co-relation queries the response was YES. [2024-06-20 16:40:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3608 conditions, 615 events. 304/615 cut-off events. For 20104/20104 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3157 event pairs, 25 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 3533. Up to 515 conditions per place. [2024-06-20 16:40:51,330 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 137 selfloop transitions, 19 changer transitions 0/160 dead transitions. [2024-06-20 16:40:51,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 160 transitions, 1787 flow [2024-06-20 16:40:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:40:51,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-20 16:40:51,332 INFO L175 Difference]: Start difference. First operand has 163 places, 147 transitions, 1431 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:40:51,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 160 transitions, 1787 flow [2024-06-20 16:40:51,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 160 transitions, 1730 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:40:51,371 INFO L231 Difference]: Finished difference. Result has 166 places, 148 transitions, 1434 flow [2024-06-20 16:40:51,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1434, PETRI_PLACES=166, PETRI_TRANSITIONS=148} [2024-06-20 16:40:51,372 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-20 16:40:51,372 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 148 transitions, 1434 flow [2024-06-20 16:40:51,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:51,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:51,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:51,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:40:51,373 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)] === [2024-06-20 16:40:51,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash -125108499, now seen corresponding path program 3 times [2024-06-20 16:40:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466358566] [2024-06-20 16:40:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:52,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466358566] [2024-06-20 16:40:52,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466358566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:52,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:52,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:52,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690743874] [2024-06-20 16:40:52,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:52,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:52,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:52,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:52,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 148 transitions, 1434 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:52,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:52,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:52,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:52,907 INFO L124 PetriNetUnfolderBase]: 308/623 cut-off events. [2024-06-20 16:40:52,907 INFO L125 PetriNetUnfolderBase]: For 20866/20866 co-relation queries the response was YES. [2024-06-20 16:40:52,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3643 conditions, 623 events. 308/623 cut-off events. For 20866/20866 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3211 event pairs, 29 based on Foata normal form. 2/624 useless extension candidates. Maximal degree in co-relation 3567. Up to 516 conditions per place. [2024-06-20 16:40:52,911 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 131 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-06-20 16:40:52,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 160 transitions, 1790 flow [2024-06-20 16:40:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:40:52,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:52,912 INFO L175 Difference]: Start difference. First operand has 166 places, 148 transitions, 1434 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:40:52,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 160 transitions, 1790 flow [2024-06-20 16:40:52,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 160 transitions, 1740 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:52,948 INFO L231 Difference]: Finished difference. Result has 168 places, 149 transitions, 1458 flow [2024-06-20 16:40:52,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1458, PETRI_PLACES=168, PETRI_TRANSITIONS=149} [2024-06-20 16:40:52,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-20 16:40:52,949 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 149 transitions, 1458 flow [2024-06-20 16:40:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:52,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:52,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:52,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:40:52,950 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)] === [2024-06-20 16:40:52,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:52,950 INFO L85 PathProgramCache]: Analyzing trace with hash -530154801, now seen corresponding path program 4 times [2024-06-20 16:40:52,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:52,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922210738] [2024-06-20 16:40:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:52,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:53,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:53,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922210738] [2024-06-20 16:40:53,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922210738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:53,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:53,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:53,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982591902] [2024-06-20 16:40:53,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:53,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:53,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:53,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:53,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:53,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 149 transitions, 1458 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:53,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:53,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:53,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:54,304 INFO L124 PetriNetUnfolderBase]: 312/631 cut-off events. [2024-06-20 16:40:54,304 INFO L125 PetriNetUnfolderBase]: For 21421/21421 co-relation queries the response was YES. [2024-06-20 16:40:54,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3706 conditions, 631 events. 312/631 cut-off events. For 21421/21421 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3252 event pairs, 29 based on Foata normal form. 2/632 useless extension candidates. Maximal degree in co-relation 3629. Up to 500 conditions per place. [2024-06-20 16:40:54,308 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 133 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-06-20 16:40:54,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 164 transitions, 1832 flow [2024-06-20 16:40:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-20 16:40:54,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-20 16:40:54,309 INFO L175 Difference]: Start difference. First operand has 168 places, 149 transitions, 1458 flow. Second operand 9 states and 118 transitions. [2024-06-20 16:40:54,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 164 transitions, 1832 flow [2024-06-20 16:40:54,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 164 transitions, 1768 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:54,358 INFO L231 Difference]: Finished difference. Result has 170 places, 150 transitions, 1476 flow [2024-06-20 16:40:54,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1476, PETRI_PLACES=170, PETRI_TRANSITIONS=150} [2024-06-20 16:40:54,358 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-20 16:40:54,358 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 150 transitions, 1476 flow [2024-06-20 16:40:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:54,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:54,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:54,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:40:54,359 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)] === [2024-06-20 16:40:54,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash -443315121, now seen corresponding path program 5 times [2024-06-20 16:40:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:54,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629584607] [2024-06-20 16:40:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:55,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:55,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629584607] [2024-06-20 16:40:55,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629584607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:55,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:55,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:55,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105495556] [2024-06-20 16:40:55,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:55,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:55,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:55,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:55,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 150 transitions, 1476 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:55,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:55,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:55,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:55,732 INFO L124 PetriNetUnfolderBase]: 316/639 cut-off events. [2024-06-20 16:40:55,733 INFO L125 PetriNetUnfolderBase]: For 22718/22718 co-relation queries the response was YES. [2024-06-20 16:40:55,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3772 conditions, 639 events. 316/639 cut-off events. For 22718/22718 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3296 event pairs, 29 based on Foata normal form. 2/640 useless extension candidates. Maximal degree in co-relation 3694. Up to 529 conditions per place. [2024-06-20 16:40:55,740 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 134 selfloop transitions, 26 changer transitions 0/164 dead transitions. [2024-06-20 16:40:55,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 164 transitions, 1850 flow [2024-06-20 16:40:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-20 16:40:55,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-20 16:40:55,750 INFO L175 Difference]: Start difference. First operand has 170 places, 150 transitions, 1476 flow. Second operand 9 states and 118 transitions. [2024-06-20 16:40:55,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 164 transitions, 1850 flow [2024-06-20 16:40:55,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 164 transitions, 1782 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:55,819 INFO L231 Difference]: Finished difference. Result has 172 places, 151 transitions, 1488 flow [2024-06-20 16:40:55,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1488, PETRI_PLACES=172, PETRI_TRANSITIONS=151} [2024-06-20 16:40:55,820 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-20 16:40:55,820 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 151 transitions, 1488 flow [2024-06-20 16:40:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:55,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:55,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:40:55,821 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)] === [2024-06-20 16:40:55,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1276640523, now seen corresponding path program 6 times [2024-06-20 16:40:55,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:55,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202006196] [2024-06-20 16:40:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:56,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:56,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202006196] [2024-06-20 16:40:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202006196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:56,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:40:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631783898] [2024-06-20 16:40:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:56,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:40:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:40:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:40:56,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:56,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 151 transitions, 1488 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:56,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:56,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:57,079 INFO L124 PetriNetUnfolderBase]: 320/647 cut-off events. [2024-06-20 16:40:57,080 INFO L125 PetriNetUnfolderBase]: For 23699/23699 co-relation queries the response was YES. [2024-06-20 16:40:57,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3827 conditions, 647 events. 320/647 cut-off events. For 23699/23699 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3345 event pairs, 26 based on Foata normal form. 2/648 useless extension candidates. Maximal degree in co-relation 3748. Up to 519 conditions per place. [2024-06-20 16:40:57,084 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 143 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-20 16:40:57,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 167 transitions, 1874 flow [2024-06-20 16:40:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:40:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:40:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:40:57,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:40:57,086 INFO L175 Difference]: Start difference. First operand has 172 places, 151 transitions, 1488 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:40:57,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 167 transitions, 1874 flow [2024-06-20 16:40:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 167 transitions, 1804 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:57,140 INFO L231 Difference]: Finished difference. Result has 174 places, 152 transitions, 1488 flow [2024-06-20 16:40:57,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1488, PETRI_PLACES=174, PETRI_TRANSITIONS=152} [2024-06-20 16:40:57,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-20 16:40:57,150 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 152 transitions, 1488 flow [2024-06-20 16:40:57,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:57,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:57,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:40:57,151 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)] === [2024-06-20 16:40:57,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:57,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1818199907, now seen corresponding path program 1 times [2024-06-20 16:40:57,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:57,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391487480] [2024-06-20 16:40:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:57,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:40:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:40:58,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:40:58,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391487480] [2024-06-20 16:40:58,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391487480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:40:58,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:40:58,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:40:58,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664257565] [2024-06-20 16:40:58,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:40:58,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:40:58,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:40:58,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:40:58,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:40:58,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:40:58,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 152 transitions, 1488 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:58,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:40:58,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:40:58,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:40:59,076 INFO L124 PetriNetUnfolderBase]: 323/651 cut-off events. [2024-06-20 16:40:59,077 INFO L125 PetriNetUnfolderBase]: For 23440/23440 co-relation queries the response was YES. [2024-06-20 16:40:59,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 651 events. 323/651 cut-off events. For 23440/23440 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3370 event pairs, 30 based on Foata normal form. 1/651 useless extension candidates. Maximal degree in co-relation 3779. Up to 489 conditions per place. [2024-06-20 16:40:59,081 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 115 selfloop transitions, 48 changer transitions 0/167 dead transitions. [2024-06-20 16:40:59,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 167 transitions, 2010 flow [2024-06-20 16:40:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:40:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:40:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-20 16:40:59,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-20 16:40:59,083 INFO L175 Difference]: Start difference. First operand has 174 places, 152 transitions, 1488 flow. Second operand 10 states and 133 transitions. [2024-06-20 16:40:59,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 167 transitions, 2010 flow [2024-06-20 16:40:59,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 167 transitions, 1950 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 16:40:59,138 INFO L231 Difference]: Finished difference. Result has 177 places, 154 transitions, 1575 flow [2024-06-20 16:40:59,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1575, PETRI_PLACES=177, PETRI_TRANSITIONS=154} [2024-06-20 16:40:59,139 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-20 16:40:59,139 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 154 transitions, 1575 flow [2024-06-20 16:40:59,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:40:59,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:40:59,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:40:59,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:40:59,139 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)] === [2024-06-20 16:40:59,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:40:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1442780311, now seen corresponding path program 2 times [2024-06-20 16:40:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:40:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928342856] [2024-06-20 16:40:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:40:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:40:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:00,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:00,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928342856] [2024-06-20 16:41:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928342856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:00,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465947036] [2024-06-20 16:41:00,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:00,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:00,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 154 transitions, 1575 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:00,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:00,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:00,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:00,783 INFO L124 PetriNetUnfolderBase]: 321/649 cut-off events. [2024-06-20 16:41:00,783 INFO L125 PetriNetUnfolderBase]: For 22645/22645 co-relation queries the response was YES. [2024-06-20 16:41:00,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3814 conditions, 649 events. 321/649 cut-off events. For 22645/22645 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3382 event pairs, 31 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 3733. Up to 525 conditions per place. [2024-06-20 16:41:00,789 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 126 selfloop transitions, 35 changer transitions 0/165 dead transitions. [2024-06-20 16:41:00,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 165 transitions, 1923 flow [2024-06-20 16:41:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-20 16:41:00,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-20 16:41:00,790 INFO L175 Difference]: Start difference. First operand has 177 places, 154 transitions, 1575 flow. Second operand 10 states and 132 transitions. [2024-06-20 16:41:00,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 165 transitions, 1923 flow [2024-06-20 16:41:00,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 165 transitions, 1774 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 16:41:00,841 INFO L231 Difference]: Finished difference. Result has 180 places, 154 transitions, 1501 flow [2024-06-20 16:41:00,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1501, PETRI_PLACES=180, PETRI_TRANSITIONS=154} [2024-06-20 16:41:00,841 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-20 16:41:00,841 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 154 transitions, 1501 flow [2024-06-20 16:41:00,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:00,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:00,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:00,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:41:00,842 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)] === [2024-06-20 16:41:00,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash -653658965, now seen corresponding path program 7 times [2024-06-20 16:41:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526580741] [2024-06-20 16:41:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:00,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526580741] [2024-06-20 16:41:01,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526580741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:01,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:01,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:41:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037471858] [2024-06-20 16:41:01,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:01,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:41:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:41:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:41:01,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:01,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 154 transitions, 1501 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:01,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:01,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:01,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:02,146 INFO L124 PetriNetUnfolderBase]: 325/655 cut-off events. [2024-06-20 16:41:02,146 INFO L125 PetriNetUnfolderBase]: For 25475/25475 co-relation queries the response was YES. [2024-06-20 16:41:02,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3809 conditions, 655 events. 325/655 cut-off events. For 25475/25475 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3442 event pairs, 34 based on Foata normal form. 2/655 useless extension candidates. Maximal degree in co-relation 3727. Up to 523 conditions per place. [2024-06-20 16:41:02,151 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 125 selfloop transitions, 35 changer transitions 0/164 dead transitions. [2024-06-20 16:41:02,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 164 transitions, 1867 flow [2024-06-20 16:41:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:41:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:41:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:41:02,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:41:02,152 INFO L175 Difference]: Start difference. First operand has 180 places, 154 transitions, 1501 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:41:02,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 164 transitions, 1867 flow [2024-06-20 16:41:02,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 164 transitions, 1768 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:41:02,206 INFO L231 Difference]: Finished difference. Result has 179 places, 155 transitions, 1504 flow [2024-06-20 16:41:02,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=179, PETRI_TRANSITIONS=155} [2024-06-20 16:41:02,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-20 16:41:02,207 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 155 transitions, 1504 flow [2024-06-20 16:41:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:02,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:41:02,208 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)] === [2024-06-20 16:41:02,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash 52270857, now seen corresponding path program 8 times [2024-06-20 16:41:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:02,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892915962] [2024-06-20 16:41:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892915962] [2024-06-20 16:41:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892915962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:03,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:03,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:41:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580852183] [2024-06-20 16:41:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:03,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:41:03,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:41:03,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:41:03,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:03,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 155 transitions, 1504 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:03,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:03,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:03,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:03,480 INFO L124 PetriNetUnfolderBase]: 329/663 cut-off events. [2024-06-20 16:41:03,481 INFO L125 PetriNetUnfolderBase]: For 25986/25986 co-relation queries the response was YES. [2024-06-20 16:41:03,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 663 events. 329/663 cut-off events. For 25986/25986 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3492 event pairs, 34 based on Foata normal form. 2/663 useless extension candidates. Maximal degree in co-relation 3801. Up to 557 conditions per place. [2024-06-20 16:41:03,485 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 136 selfloop transitions, 25 changer transitions 0/165 dead transitions. [2024-06-20 16:41:03,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 165 transitions, 1874 flow [2024-06-20 16:41:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:41:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:41:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-20 16:41:03,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:41:03,486 INFO L175 Difference]: Start difference. First operand has 179 places, 155 transitions, 1504 flow. Second operand 9 states and 117 transitions. [2024-06-20 16:41:03,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 165 transitions, 1874 flow [2024-06-20 16:41:03,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 165 transitions, 1782 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:41:03,549 INFO L231 Difference]: Finished difference. Result has 181 places, 156 transitions, 1496 flow [2024-06-20 16:41:03,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1496, PETRI_PLACES=181, PETRI_TRANSITIONS=156} [2024-06-20 16:41:03,550 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-20 16:41:03,550 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 156 transitions, 1496 flow [2024-06-20 16:41:03,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:03,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:03,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:41:03,551 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)] === [2024-06-20 16:41:03,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1758152303, now seen corresponding path program 9 times [2024-06-20 16:41:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:03,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631227628] [2024-06-20 16:41:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:04,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:04,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631227628] [2024-06-20 16:41:04,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631227628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:04,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:04,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:41:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838522409] [2024-06-20 16:41:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:41:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:41:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:41:04,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:04,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 156 transitions, 1496 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:04,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:04,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:04,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:04,773 INFO L124 PetriNetUnfolderBase]: 333/671 cut-off events. [2024-06-20 16:41:04,774 INFO L125 PetriNetUnfolderBase]: For 26942/26942 co-relation queries the response was YES. [2024-06-20 16:41:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3916 conditions, 671 events. 333/671 cut-off events. For 26942/26942 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3567 event pairs, 36 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 3832. Up to 571 conditions per place. [2024-06-20 16:41:04,779 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 140 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2024-06-20 16:41:04,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 167 transitions, 1883 flow [2024-06-20 16:41:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:41:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:41:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:41:04,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-20 16:41:04,780 INFO L175 Difference]: Start difference. First operand has 181 places, 156 transitions, 1496 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:41:04,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 167 transitions, 1883 flow [2024-06-20 16:41:04,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 167 transitions, 1807 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 16:41:04,844 INFO L231 Difference]: Finished difference. Result has 184 places, 158 transitions, 1518 flow [2024-06-20 16:41:04,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1518, PETRI_PLACES=184, PETRI_TRANSITIONS=158} [2024-06-20 16:41:04,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-20 16:41:04,845 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 158 transitions, 1518 flow [2024-06-20 16:41:04,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:04,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:04,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:04,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:41:04,845 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)] === [2024-06-20 16:41:04,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash -147178803, now seen corresponding path program 10 times [2024-06-20 16:41:04,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:04,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008015847] [2024-06-20 16:41:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:04,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:05,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:05,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008015847] [2024-06-20 16:41:05,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008015847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:05,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:05,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:41:05,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097779826] [2024-06-20 16:41:05,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:05,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:41:05,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:05,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:41:05,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:41:05,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:05,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 158 transitions, 1518 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:05,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:05,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:05,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:06,217 INFO L124 PetriNetUnfolderBase]: 330/666 cut-off events. [2024-06-20 16:41:06,217 INFO L125 PetriNetUnfolderBase]: For 24585/24585 co-relation queries the response was YES. [2024-06-20 16:41:06,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3745 conditions, 666 events. 330/666 cut-off events. For 24585/24585 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3523 event pairs, 33 based on Foata normal form. 2/666 useless extension candidates. Maximal degree in co-relation 3659. Up to 561 conditions per place. [2024-06-20 16:41:06,222 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 142 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2024-06-20 16:41:06,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 168 transitions, 1868 flow [2024-06-20 16:41:06,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:41:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:41:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:41:06,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-20 16:41:06,224 INFO L175 Difference]: Start difference. First operand has 184 places, 158 transitions, 1518 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:41:06,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 168 transitions, 1868 flow [2024-06-20 16:41:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 168 transitions, 1799 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:41:06,292 INFO L231 Difference]: Finished difference. Result has 187 places, 158 transitions, 1497 flow [2024-06-20 16:41:06,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1497, PETRI_PLACES=187, PETRI_TRANSITIONS=158} [2024-06-20 16:41:06,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-20 16:41:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 158 transitions, 1497 flow [2024-06-20 16:41:06,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:06,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:06,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:06,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:41:06,294 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)] === [2024-06-20 16:41:06,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1964811695, now seen corresponding path program 3 times [2024-06-20 16:41:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:06,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022124305] [2024-06-20 16:41:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:07,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:07,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022124305] [2024-06-20 16:41:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022124305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:07,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107886278] [2024-06-20 16:41:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:07,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:07,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 158 transitions, 1497 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:07,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:07,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:07,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:08,228 INFO L124 PetriNetUnfolderBase]: 333/669 cut-off events. [2024-06-20 16:41:08,228 INFO L125 PetriNetUnfolderBase]: For 23759/23759 co-relation queries the response was YES. [2024-06-20 16:41:08,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3767 conditions, 669 events. 333/669 cut-off events. For 23759/23759 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3542 event pairs, 37 based on Foata normal form. 1/666 useless extension candidates. Maximal degree in co-relation 3680. Up to 518 conditions per place. [2024-06-20 16:41:08,233 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 119 selfloop transitions, 47 changer transitions 0/170 dead transitions. [2024-06-20 16:41:08,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 170 transitions, 2013 flow [2024-06-20 16:41:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:08,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:08,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-20 16:41:08,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-20 16:41:08,234 INFO L175 Difference]: Start difference. First operand has 187 places, 158 transitions, 1497 flow. Second operand 10 states and 133 transitions. [2024-06-20 16:41:08,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 170 transitions, 2013 flow [2024-06-20 16:41:08,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 170 transitions, 1885 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:08,313 INFO L231 Difference]: Finished difference. Result has 188 places, 160 transitions, 1520 flow [2024-06-20 16:41:08,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1520, PETRI_PLACES=188, PETRI_TRANSITIONS=160} [2024-06-20 16:41:08,314 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-20 16:41:08,314 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 160 transitions, 1520 flow [2024-06-20 16:41:08,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:08,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:08,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:08,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:41:08,315 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)] === [2024-06-20 16:41:08,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 52276809, now seen corresponding path program 4 times [2024-06-20 16:41:08,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:08,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177126569] [2024-06-20 16:41:08,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:08,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:09,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:09,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177126569] [2024-06-20 16:41:09,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177126569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:09,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:09,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:09,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826011555] [2024-06-20 16:41:09,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:09,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:09,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:09,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:09,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:09,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:09,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 160 transitions, 1520 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:09,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:09,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:09,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:10,037 INFO L124 PetriNetUnfolderBase]: 331/668 cut-off events. [2024-06-20 16:41:10,038 INFO L125 PetriNetUnfolderBase]: For 22651/22651 co-relation queries the response was YES. [2024-06-20 16:41:10,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3609 conditions, 668 events. 331/668 cut-off events. For 22651/22651 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3523 event pairs, 35 based on Foata normal form. 1/667 useless extension candidates. Maximal degree in co-relation 3522. Up to 553 conditions per place. [2024-06-20 16:41:10,043 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 133 selfloop transitions, 32 changer transitions 0/169 dead transitions. [2024-06-20 16:41:10,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 169 transitions, 1870 flow [2024-06-20 16:41:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-20 16:41:10,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:41:10,044 INFO L175 Difference]: Start difference. First operand has 188 places, 160 transitions, 1520 flow. Second operand 10 states and 130 transitions. [2024-06-20 16:41:10,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 169 transitions, 1870 flow [2024-06-20 16:41:10,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 169 transitions, 1702 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:10,107 INFO L231 Difference]: Finished difference. Result has 190 places, 160 transitions, 1421 flow [2024-06-20 16:41:10,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1421, PETRI_PLACES=190, PETRI_TRANSITIONS=160} [2024-06-20 16:41:10,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-20 16:41:10,116 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 160 transitions, 1421 flow [2024-06-20 16:41:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:10,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:10,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:10,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:41:10,117 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)] === [2024-06-20 16:41:10,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash -398139985, now seen corresponding path program 5 times [2024-06-20 16:41:10,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:10,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768718592] [2024-06-20 16:41:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:10,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:11,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768718592] [2024-06-20 16:41:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768718592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:11,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:11,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782322012] [2024-06-20 16:41:11,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:11,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:11,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:11,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:11,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 160 transitions, 1421 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:11,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:11,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:11,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:12,143 INFO L124 PetriNetUnfolderBase]: 329/666 cut-off events. [2024-06-20 16:41:12,144 INFO L125 PetriNetUnfolderBase]: For 21177/21177 co-relation queries the response was YES. [2024-06-20 16:41:12,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3437 conditions, 666 events. 329/666 cut-off events. For 21177/21177 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3511 event pairs, 41 based on Foata normal form. 1/666 useless extension candidates. Maximal degree in co-relation 3349. Up to 588 conditions per place. [2024-06-20 16:41:12,148 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 148 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2024-06-20 16:41:12,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 169 transitions, 1771 flow [2024-06-20 16:41:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:41:12,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-20 16:41:12,150 INFO L175 Difference]: Start difference. First operand has 190 places, 160 transitions, 1421 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:41:12,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 169 transitions, 1771 flow [2024-06-20 16:41:12,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 169 transitions, 1622 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-20 16:41:12,214 INFO L231 Difference]: Finished difference. Result has 190 places, 160 transitions, 1311 flow [2024-06-20 16:41:12,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1311, PETRI_PLACES=190, PETRI_TRANSITIONS=160} [2024-06-20 16:41:12,214 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-20 16:41:12,215 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 160 transitions, 1311 flow [2024-06-20 16:41:12,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:12,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:12,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:12,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:41:12,215 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)] === [2024-06-20 16:41:12,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash -809099475, now seen corresponding path program 6 times [2024-06-20 16:41:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:12,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077832544] [2024-06-20 16:41:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:14,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:14,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077832544] [2024-06-20 16:41:14,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077832544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:14,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:14,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:14,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560844782] [2024-06-20 16:41:14,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:14,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:14,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:14,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 160 transitions, 1311 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:14,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:14,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:14,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:14,530 INFO L124 PetriNetUnfolderBase]: 332/670 cut-off events. [2024-06-20 16:41:14,530 INFO L125 PetriNetUnfolderBase]: For 21695/21695 co-relation queries the response was YES. [2024-06-20 16:41:14,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 670 events. 332/670 cut-off events. For 21695/21695 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3548 event pairs, 35 based on Foata normal form. 1/669 useless extension candidates. Maximal degree in co-relation 3320. Up to 500 conditions per place. [2024-06-20 16:41:14,535 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 116 selfloop transitions, 51 changer transitions 0/171 dead transitions. [2024-06-20 16:41:14,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 171 transitions, 1715 flow [2024-06-20 16:41:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-20 16:41:14,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-20 16:41:14,538 INFO L175 Difference]: Start difference. First operand has 190 places, 160 transitions, 1311 flow. Second operand 10 states and 132 transitions. [2024-06-20 16:41:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 171 transitions, 1715 flow [2024-06-20 16:41:14,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 171 transitions, 1675 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:14,600 INFO L231 Difference]: Finished difference. Result has 192 places, 162 transitions, 1432 flow [2024-06-20 16:41:14,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1432, PETRI_PLACES=192, PETRI_TRANSITIONS=162} [2024-06-20 16:41:14,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-20 16:41:14,601 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 162 transitions, 1432 flow [2024-06-20 16:41:14,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:14,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:14,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:14,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:41:14,602 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)] === [2024-06-20 16:41:14,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:14,602 INFO L85 PathProgramCache]: Analyzing trace with hash -653653013, now seen corresponding path program 7 times [2024-06-20 16:41:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791990672] [2024-06-20 16:41:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791990672] [2024-06-20 16:41:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791990672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:16,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:16,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036641199] [2024-06-20 16:41:16,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:16,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:16,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:16,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 162 transitions, 1432 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:16,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:16,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:16,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:17,199 INFO L124 PetriNetUnfolderBase]: 330/667 cut-off events. [2024-06-20 16:41:17,199 INFO L125 PetriNetUnfolderBase]: For 20828/20828 co-relation queries the response was YES. [2024-06-20 16:41:17,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 667 events. 330/667 cut-off events. For 20828/20828 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3531 event pairs, 35 based on Foata normal form. 1/666 useless extension candidates. Maximal degree in co-relation 3318. Up to 497 conditions per place. [2024-06-20 16:41:17,204 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 115 selfloop transitions, 52 changer transitions 0/171 dead transitions. [2024-06-20 16:41:17,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 171 transitions, 1786 flow [2024-06-20 16:41:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:41:17,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-20 16:41:17,213 INFO L175 Difference]: Start difference. First operand has 192 places, 162 transitions, 1432 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:41:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 171 transitions, 1786 flow [2024-06-20 16:41:17,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 171 transitions, 1601 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:17,284 INFO L231 Difference]: Finished difference. Result has 194 places, 162 transitions, 1356 flow [2024-06-20 16:41:17,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1356, PETRI_PLACES=194, PETRI_TRANSITIONS=162} [2024-06-20 16:41:17,285 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-20 16:41:17,285 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 162 transitions, 1356 flow [2024-06-20 16:41:17,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:17,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:17,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:17,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:41:17,285 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)] === [2024-06-20 16:41:17,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1974611519, now seen corresponding path program 1 times [2024-06-20 16:41:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:17,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161149081] [2024-06-20 16:41:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:17,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:18,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:18,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161149081] [2024-06-20 16:41:18,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161149081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:18,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:18,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077748484] [2024-06-20 16:41:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:18,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:18,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 162 transitions, 1356 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:18,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:18,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:18,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:18,794 INFO L124 PetriNetUnfolderBase]: 346/709 cut-off events. [2024-06-20 16:41:18,795 INFO L125 PetriNetUnfolderBase]: For 36637/36637 co-relation queries the response was YES. [2024-06-20 16:41:18,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3565 conditions, 709 events. 346/709 cut-off events. For 36637/36637 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3798 event pairs, 38 based on Foata normal form. 10/718 useless extension candidates. Maximal degree in co-relation 3474. Up to 543 conditions per place. [2024-06-20 16:41:18,800 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 32 changer transitions 6/178 dead transitions. [2024-06-20 16:41:18,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 178 transitions, 1812 flow [2024-06-20 16:41:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-20 16:41:18,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-20 16:41:18,807 INFO L175 Difference]: Start difference. First operand has 194 places, 162 transitions, 1356 flow. Second operand 10 states and 134 transitions. [2024-06-20 16:41:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 178 transitions, 1812 flow [2024-06-20 16:41:18,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 178 transitions, 1692 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:18,875 INFO L231 Difference]: Finished difference. Result has 195 places, 160 transitions, 1312 flow [2024-06-20 16:41:18,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1312, PETRI_PLACES=195, PETRI_TRANSITIONS=160} [2024-06-20 16:41:18,875 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-20 16:41:18,876 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 160 transitions, 1312 flow [2024-06-20 16:41:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:18,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:18,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:18,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:41:18,876 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)] === [2024-06-20 16:41:18,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:18,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1120637023, now seen corresponding path program 2 times [2024-06-20 16:41:18,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752101831] [2024-06-20 16:41:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:20,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752101831] [2024-06-20 16:41:20,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752101831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:20,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:20,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:20,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575838970] [2024-06-20 16:41:20,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:20,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:20,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:20,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:20,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:20,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 160 transitions, 1312 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:20,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:20,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:20,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:20,541 INFO L124 PetriNetUnfolderBase]: 333/676 cut-off events. [2024-06-20 16:41:20,542 INFO L125 PetriNetUnfolderBase]: For 24655/24655 co-relation queries the response was YES. [2024-06-20 16:41:20,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3411 conditions, 676 events. 333/676 cut-off events. For 24655/24655 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3576 event pairs, 34 based on Foata normal form. 2/677 useless extension candidates. Maximal degree in co-relation 3319. Up to 560 conditions per place. [2024-06-20 16:41:20,546 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 140 selfloop transitions, 29 changer transitions 0/173 dead transitions. [2024-06-20 16:41:20,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 173 transitions, 1704 flow [2024-06-20 16:41:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-20 16:41:20,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:41:20,548 INFO L175 Difference]: Start difference. First operand has 195 places, 160 transitions, 1312 flow. Second operand 10 states and 130 transitions. [2024-06-20 16:41:20,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 173 transitions, 1704 flow [2024-06-20 16:41:20,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 173 transitions, 1606 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-20 16:41:20,605 INFO L231 Difference]: Finished difference. Result has 195 places, 161 transitions, 1304 flow [2024-06-20 16:41:20,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1304, PETRI_PLACES=195, PETRI_TRANSITIONS=161} [2024-06-20 16:41:20,606 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-20 16:41:20,606 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 161 transitions, 1304 flow [2024-06-20 16:41:20,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:20,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:20,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:41:20,607 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)] === [2024-06-20 16:41:20,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash 416604577, now seen corresponding path program 3 times [2024-06-20 16:41:20,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:20,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755712015] [2024-06-20 16:41:20,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:20,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:22,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:22,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755712015] [2024-06-20 16:41:22,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755712015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:22,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:22,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:22,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796300357] [2024-06-20 16:41:22,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:22,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:22,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:22,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:22,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:22,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:22,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 161 transitions, 1304 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:22,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:22,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:22,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:22,561 INFO L124 PetriNetUnfolderBase]: 337/684 cut-off events. [2024-06-20 16:41:22,561 INFO L125 PetriNetUnfolderBase]: For 24596/24596 co-relation queries the response was YES. [2024-06-20 16:41:22,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3439 conditions, 684 events. 337/684 cut-off events. For 24596/24596 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3625 event pairs, 34 based on Foata normal form. 2/685 useless extension candidates. Maximal degree in co-relation 3347. Up to 548 conditions per place. [2024-06-20 16:41:22,567 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 140 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2024-06-20 16:41:22,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 175 transitions, 1704 flow [2024-06-20 16:41:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:41:22,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-20 16:41:22,568 INFO L175 Difference]: Start difference. First operand has 195 places, 161 transitions, 1304 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:41:22,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 175 transitions, 1704 flow [2024-06-20 16:41:22,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 175 transitions, 1624 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:22,637 INFO L231 Difference]: Finished difference. Result has 197 places, 162 transitions, 1320 flow [2024-06-20 16:41:22,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1320, PETRI_PLACES=197, PETRI_TRANSITIONS=162} [2024-06-20 16:41:22,638 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-20 16:41:22,638 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 162 transitions, 1320 flow [2024-06-20 16:41:22,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:22,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:22,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:22,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:41:22,639 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)] === [2024-06-20 16:41:22,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:22,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1466783617, now seen corresponding path program 4 times [2024-06-20 16:41:22,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:22,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458222725] [2024-06-20 16:41:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:22,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:23,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:23,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458222725] [2024-06-20 16:41:23,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458222725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:23,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:23,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:23,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250831875] [2024-06-20 16:41:23,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:23,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:23,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:23,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:23,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:24,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:24,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 162 transitions, 1320 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:24,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:24,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:24,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:24,484 INFO L124 PetriNetUnfolderBase]: 341/696 cut-off events. [2024-06-20 16:41:24,484 INFO L125 PetriNetUnfolderBase]: For 25439/25439 co-relation queries the response was YES. [2024-06-20 16:41:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 696 events. 341/696 cut-off events. For 25439/25439 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3710 event pairs, 38 based on Foata normal form. 2/697 useless extension candidates. Maximal degree in co-relation 3409. Up to 588 conditions per place. [2024-06-20 16:41:24,489 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 151 selfloop transitions, 21 changer transitions 0/176 dead transitions. [2024-06-20 16:41:24,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 176 transitions, 1724 flow [2024-06-20 16:41:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-20 16:41:24,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-20 16:41:24,490 INFO L175 Difference]: Start difference. First operand has 197 places, 162 transitions, 1320 flow. Second operand 10 states and 125 transitions. [2024-06-20 16:41:24,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 176 transitions, 1724 flow [2024-06-20 16:41:24,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 176 transitions, 1638 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:24,558 INFO L231 Difference]: Finished difference. Result has 199 places, 163 transitions, 1312 flow [2024-06-20 16:41:24,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1312, PETRI_PLACES=199, PETRI_TRANSITIONS=163} [2024-06-20 16:41:24,559 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-20 16:41:24,559 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 163 transitions, 1312 flow [2024-06-20 16:41:24,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:24,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:24,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:41:24,559 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)] === [2024-06-20 16:41:24,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1736785409, now seen corresponding path program 5 times [2024-06-20 16:41:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:24,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025564709] [2024-06-20 16:41:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:24,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:25,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:25,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025564709] [2024-06-20 16:41:25,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025564709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:25,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:25,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:25,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472533978] [2024-06-20 16:41:25,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:25,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:25,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:25,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:25,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 163 transitions, 1312 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:25,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:25,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:25,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:26,140 INFO L124 PetriNetUnfolderBase]: 353/724 cut-off events. [2024-06-20 16:41:26,141 INFO L125 PetriNetUnfolderBase]: For 36632/36632 co-relation queries the response was YES. [2024-06-20 16:41:26,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 724 events. 353/724 cut-off events. For 36632/36632 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3884 event pairs, 38 based on Foata normal form. 8/731 useless extension candidates. Maximal degree in co-relation 3509. Up to 590 conditions per place. [2024-06-20 16:41:26,146 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 148 selfloop transitions, 15 changer transitions 13/180 dead transitions. [2024-06-20 16:41:26,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 180 transitions, 1748 flow [2024-06-20 16:41:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-20 16:41:26,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-20 16:41:26,147 INFO L175 Difference]: Start difference. First operand has 199 places, 163 transitions, 1312 flow. Second operand 10 states and 128 transitions. [2024-06-20 16:41:26,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 180 transitions, 1748 flow [2024-06-20 16:41:26,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 180 transitions, 1680 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:26,230 INFO L231 Difference]: Finished difference. Result has 201 places, 159 transitions, 1247 flow [2024-06-20 16:41:26,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1247, PETRI_PLACES=201, PETRI_TRANSITIONS=159} [2024-06-20 16:41:26,230 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 171 predicate places. [2024-06-20 16:41:26,230 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 159 transitions, 1247 flow [2024-06-20 16:41:26,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:26,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:26,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:26,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:41:26,231 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)] === [2024-06-20 16:41:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash -862450083, now seen corresponding path program 6 times [2024-06-20 16:41:26,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:26,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795110664] [2024-06-20 16:41:26,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:26,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:27,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795110664] [2024-06-20 16:41:27,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795110664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:27,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:27,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091042295] [2024-06-20 16:41:27,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:27,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:27,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:27,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 159 transitions, 1247 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:27,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:27,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:27,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:27,647 INFO L124 PetriNetUnfolderBase]: 341/704 cut-off events. [2024-06-20 16:41:27,647 INFO L125 PetriNetUnfolderBase]: For 37316/37316 co-relation queries the response was YES. [2024-06-20 16:41:27,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3474 conditions, 704 events. 341/704 cut-off events. For 37316/37316 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3762 event pairs, 33 based on Foata normal form. 8/711 useless extension candidates. Maximal degree in co-relation 3379. Up to 539 conditions per place. [2024-06-20 16:41:27,652 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 138 selfloop transitions, 20 changer transitions 16/178 dead transitions. [2024-06-20 16:41:27,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 178 transitions, 1685 flow [2024-06-20 16:41:27,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:41:27,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-20 16:41:27,669 INFO L175 Difference]: Start difference. First operand has 201 places, 159 transitions, 1247 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:41:27,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 178 transitions, 1685 flow [2024-06-20 16:41:27,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 178 transitions, 1649 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:27,745 INFO L231 Difference]: Finished difference. Result has 197 places, 152 transitions, 1220 flow [2024-06-20 16:41:27,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1220, PETRI_PLACES=197, PETRI_TRANSITIONS=152} [2024-06-20 16:41:27,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-20 16:41:27,746 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 152 transitions, 1220 flow [2024-06-20 16:41:27,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:27,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:27,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:27,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:41:27,746 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)] === [2024-06-20 16:41:27,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:27,747 INFO L85 PathProgramCache]: Analyzing trace with hash 745186423, now seen corresponding path program 7 times [2024-06-20 16:41:27,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:27,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835168026] [2024-06-20 16:41:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:27,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:28,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835168026] [2024-06-20 16:41:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835168026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:28,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448861064] [2024-06-20 16:41:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:28,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:28,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:28,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:28,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 152 transitions, 1220 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:28,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:28,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:28,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:29,264 INFO L124 PetriNetUnfolderBase]: 348/725 cut-off events. [2024-06-20 16:41:29,264 INFO L125 PetriNetUnfolderBase]: For 55325/55325 co-relation queries the response was YES. [2024-06-20 16:41:29,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4347 conditions, 725 events. 348/725 cut-off events. For 55325/55325 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3898 event pairs, 46 based on Foata normal form. 8/732 useless extension candidates. Maximal degree in co-relation 4254. Up to 510 conditions per place. [2024-06-20 16:41:29,269 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 143 selfloop transitions, 22 changer transitions 7/176 dead transitions. [2024-06-20 16:41:29,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 176 transitions, 1900 flow [2024-06-20 16:41:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-20 16:41:29,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-20 16:41:29,270 INFO L175 Difference]: Start difference. First operand has 197 places, 152 transitions, 1220 flow. Second operand 10 states and 137 transitions. [2024-06-20 16:41:29,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 176 transitions, 1900 flow [2024-06-20 16:41:29,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 176 transitions, 1840 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 16:41:29,377 INFO L231 Difference]: Finished difference. Result has 189 places, 150 transitions, 1207 flow [2024-06-20 16:41:29,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1207, PETRI_PLACES=189, PETRI_TRANSITIONS=150} [2024-06-20 16:41:29,377 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2024-06-20 16:41:29,378 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 150 transitions, 1207 flow [2024-06-20 16:41:29,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:29,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:29,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:29,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:41:29,378 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)] === [2024-06-20 16:41:29,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash -857688483, now seen corresponding path program 8 times [2024-06-20 16:41:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:29,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325510139] [2024-06-20 16:41:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:29,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:30,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325510139] [2024-06-20 16:41:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325510139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:30,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:30,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596298472] [2024-06-20 16:41:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:30,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:30,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:30,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 150 transitions, 1207 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:30,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:30,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:30,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:30,738 INFO L124 PetriNetUnfolderBase]: 317/664 cut-off events. [2024-06-20 16:41:30,738 INFO L125 PetriNetUnfolderBase]: For 36301/36301 co-relation queries the response was YES. [2024-06-20 16:41:30,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3377 conditions, 664 events. 317/664 cut-off events. For 36301/36301 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3523 event pairs, 37 based on Foata normal form. 10/673 useless extension candidates. Maximal degree in co-relation 3288. Up to 510 conditions per place. [2024-06-20 16:41:30,742 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 132 selfloop transitions, 14 changer transitions 19/169 dead transitions. [2024-06-20 16:41:30,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 169 transitions, 1691 flow [2024-06-20 16:41:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:41:30,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-20 16:41:30,743 INFO L175 Difference]: Start difference. First operand has 189 places, 150 transitions, 1207 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:41:30,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 169 transitions, 1691 flow [2024-06-20 16:41:30,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 169 transitions, 1645 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:30,803 INFO L231 Difference]: Finished difference. Result has 188 places, 141 transitions, 1143 flow [2024-06-20 16:41:30,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1143, PETRI_PLACES=188, PETRI_TRANSITIONS=141} [2024-06-20 16:41:30,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-20 16:41:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 141 transitions, 1143 flow [2024-06-20 16:41:30,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:41:30,804 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)] === [2024-06-20 16:41:30,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash 686978653, now seen corresponding path program 9 times [2024-06-20 16:41:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593569874] [2024-06-20 16:41:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:31,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593569874] [2024-06-20 16:41:31,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593569874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:31,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:31,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:31,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849641356] [2024-06-20 16:41:31,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:31,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:31,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:32,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:32,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 141 transitions, 1143 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:32,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:32,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:32,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:32,326 INFO L124 PetriNetUnfolderBase]: 289/608 cut-off events. [2024-06-20 16:41:32,327 INFO L125 PetriNetUnfolderBase]: For 21569/21569 co-relation queries the response was YES. [2024-06-20 16:41:32,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 608 events. 289/608 cut-off events. For 21569/21569 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3138 event pairs, 27 based on Foata normal form. 2/609 useless extension candidates. Maximal degree in co-relation 2988. Up to 470 conditions per place. [2024-06-20 16:41:32,331 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 137 selfloop transitions, 18 changer transitions 0/159 dead transitions. [2024-06-20 16:41:32,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 159 transitions, 1525 flow [2024-06-20 16:41:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:32,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-20 16:41:32,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-20 16:41:32,332 INFO L175 Difference]: Start difference. First operand has 188 places, 141 transitions, 1143 flow. Second operand 10 states and 127 transitions. [2024-06-20 16:41:32,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 159 transitions, 1525 flow [2024-06-20 16:41:32,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 159 transitions, 1481 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:32,381 INFO L231 Difference]: Finished difference. Result has 179 places, 142 transitions, 1173 flow [2024-06-20 16:41:32,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1173, PETRI_PLACES=179, PETRI_TRANSITIONS=142} [2024-06-20 16:41:32,381 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-20 16:41:32,381 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 142 transitions, 1173 flow [2024-06-20 16:41:32,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:32,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:32,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:32,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:41:32,382 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)] === [2024-06-20 16:41:32,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1559287965, now seen corresponding path program 1 times [2024-06-20 16:41:32,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:32,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651579116] [2024-06-20 16:41:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:32,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:33,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:33,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651579116] [2024-06-20 16:41:33,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651579116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:33,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:33,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:33,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331163552] [2024-06-20 16:41:33,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:33,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:33,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 142 transitions, 1173 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:33,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:33,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:33,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:33,906 INFO L124 PetriNetUnfolderBase]: 319/678 cut-off events. [2024-06-20 16:41:33,906 INFO L125 PetriNetUnfolderBase]: For 37148/37148 co-relation queries the response was YES. [2024-06-20 16:41:33,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3791 conditions, 678 events. 319/678 cut-off events. For 37148/37148 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3616 event pairs, 47 based on Foata normal form. 6/683 useless extension candidates. Maximal degree in co-relation 3706. Up to 447 conditions per place. [2024-06-20 16:41:33,911 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 124 selfloop transitions, 26 changer transitions 7/161 dead transitions. [2024-06-20 16:41:33,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 161 transitions, 1709 flow [2024-06-20 16:41:33,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-20 16:41:33,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-20 16:41:33,912 INFO L175 Difference]: Start difference. First operand has 179 places, 142 transitions, 1173 flow. Second operand 10 states and 135 transitions. [2024-06-20 16:41:33,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 161 transitions, 1709 flow [2024-06-20 16:41:33,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 161 transitions, 1645 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:33,976 INFO L231 Difference]: Finished difference. Result has 181 places, 139 transitions, 1145 flow [2024-06-20 16:41:33,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1145, PETRI_PLACES=181, PETRI_TRANSITIONS=139} [2024-06-20 16:41:33,977 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-20 16:41:33,977 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 139 transitions, 1145 flow [2024-06-20 16:41:33,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:33,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:33,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:33,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:41:33,977 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)] === [2024-06-20 16:41:33,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 644690301, now seen corresponding path program 2 times [2024-06-20 16:41:33,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:33,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697182471] [2024-06-20 16:41:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:35,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:35,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697182471] [2024-06-20 16:41:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697182471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:35,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:41:35,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778188026] [2024-06-20 16:41:35,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:35,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:41:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:41:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:41:35,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:35,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 139 transitions, 1145 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:35,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:35,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:35,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:36,094 INFO L124 PetriNetUnfolderBase]: 316/669 cut-off events. [2024-06-20 16:41:36,094 INFO L125 PetriNetUnfolderBase]: For 41775/41775 co-relation queries the response was YES. [2024-06-20 16:41:36,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3755 conditions, 669 events. 316/669 cut-off events. For 41775/41775 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3563 event pairs, 53 based on Foata normal form. 8/676 useless extension candidates. Maximal degree in co-relation 3669. Up to 520 conditions per place. [2024-06-20 16:41:36,099 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 118 selfloop transitions, 24 changer transitions 9/155 dead transitions. [2024-06-20 16:41:36,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 1525 flow [2024-06-20 16:41:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-20 16:41:36,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-20 16:41:36,100 INFO L175 Difference]: Start difference. First operand has 181 places, 139 transitions, 1145 flow. Second operand 11 states and 141 transitions. [2024-06-20 16:41:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 1525 flow [2024-06-20 16:41:36,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 155 transitions, 1475 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:36,165 INFO L231 Difference]: Finished difference. Result has 180 places, 136 transitions, 1126 flow [2024-06-20 16:41:36,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1126, PETRI_PLACES=180, PETRI_TRANSITIONS=136} [2024-06-20 16:41:36,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-20 16:41:36,166 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 136 transitions, 1126 flow [2024-06-20 16:41:36,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:36,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:36,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:36,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:41:36,166 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)] === [2024-06-20 16:41:36,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash -535877567, now seen corresponding path program 3 times [2024-06-20 16:41:36,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:36,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021944198] [2024-06-20 16:41:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:36,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:37,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:37,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021944198] [2024-06-20 16:41:37,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021944198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:37,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:37,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:41:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040511998] [2024-06-20 16:41:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:41:37,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:41:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:41:37,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:37,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 136 transitions, 1126 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:37,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:37,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:37,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:37,948 INFO L124 PetriNetUnfolderBase]: 304/649 cut-off events. [2024-06-20 16:41:37,948 INFO L125 PetriNetUnfolderBase]: For 36936/36936 co-relation queries the response was YES. [2024-06-20 16:41:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3492 conditions, 649 events. 304/649 cut-off events. For 36936/36936 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3406 event pairs, 52 based on Foata normal form. 8/656 useless extension candidates. Maximal degree in co-relation 3407. Up to 490 conditions per place. [2024-06-20 16:41:37,953 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 21 changer transitions 13/152 dead transitions. [2024-06-20 16:41:37,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 152 transitions, 1500 flow [2024-06-20 16:41:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-20 16:41:37,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-20 16:41:37,954 INFO L175 Difference]: Start difference. First operand has 180 places, 136 transitions, 1126 flow. Second operand 11 states and 141 transitions. [2024-06-20 16:41:37,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 152 transitions, 1500 flow [2024-06-20 16:41:38,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 152 transitions, 1448 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:41:38,021 INFO L231 Difference]: Finished difference. Result has 178 places, 130 transitions, 1081 flow [2024-06-20 16:41:38,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1081, PETRI_PLACES=178, PETRI_TRANSITIONS=130} [2024-06-20 16:41:38,037 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-20 16:41:38,037 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 130 transitions, 1081 flow [2024-06-20 16:41:38,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:38,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:38,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:38,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:41:38,037 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)] === [2024-06-20 16:41:38,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:38,038 INFO L85 PathProgramCache]: Analyzing trace with hash 466068879, now seen corresponding path program 10 times [2024-06-20 16:41:38,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:38,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250417304] [2024-06-20 16:41:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:38,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:38,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:38,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250417304] [2024-06-20 16:41:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250417304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:38,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:38,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994309125] [2024-06-20 16:41:38,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:38,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:38,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:39,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:39,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 130 transitions, 1081 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:39,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:39,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:39,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:39,274 INFO L124 PetriNetUnfolderBase]: 296/635 cut-off events. [2024-06-20 16:41:39,274 INFO L125 PetriNetUnfolderBase]: For 39102/39102 co-relation queries the response was YES. [2024-06-20 16:41:39,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3471 conditions, 635 events. 296/635 cut-off events. For 39102/39102 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3340 event pairs, 55 based on Foata normal form. 10/643 useless extension candidates. Maximal degree in co-relation 3387. Up to 387 conditions per place. [2024-06-20 16:41:39,279 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 56 changer transitions 6/144 dead transitions. [2024-06-20 16:41:39,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 144 transitions, 1465 flow [2024-06-20 16:41:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-20 16:41:39,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-06-20 16:41:39,280 INFO L175 Difference]: Start difference. First operand has 178 places, 130 transitions, 1081 flow. Second operand 10 states and 139 transitions. [2024-06-20 16:41:39,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 144 transitions, 1465 flow [2024-06-20 16:41:39,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 144 transitions, 1407 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-20 16:41:39,334 INFO L231 Difference]: Finished difference. Result has 171 places, 128 transitions, 1157 flow [2024-06-20 16:41:39,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1157, PETRI_PLACES=171, PETRI_TRANSITIONS=128} [2024-06-20 16:41:39,334 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-20 16:41:39,334 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 128 transitions, 1157 flow [2024-06-20 16:41:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:39,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:39,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:41:39,335 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)] === [2024-06-20 16:41:39,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1211586945, now seen corresponding path program 11 times [2024-06-20 16:41:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:39,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997616937] [2024-06-20 16:41:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997616937] [2024-06-20 16:41:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997616937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:40,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:40,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363363230] [2024-06-20 16:41:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:40,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:40,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 128 transitions, 1157 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:40,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:40,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:40,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:40,525 INFO L124 PetriNetUnfolderBase]: 283/606 cut-off events. [2024-06-20 16:41:40,525 INFO L125 PetriNetUnfolderBase]: For 25440/25440 co-relation queries the response was YES. [2024-06-20 16:41:40,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3389 conditions, 606 events. 283/606 cut-off events. For 25440/25440 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3131 event pairs, 53 based on Foata normal form. 2/606 useless extension candidates. Maximal degree in co-relation 3308. Up to 395 conditions per place. [2024-06-20 16:41:40,529 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 74 selfloop transitions, 61 changer transitions 0/139 dead transitions. [2024-06-20 16:41:40,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 139 transitions, 1481 flow [2024-06-20 16:41:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-20 16:41:40,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-20 16:41:40,530 INFO L175 Difference]: Start difference. First operand has 171 places, 128 transitions, 1157 flow. Second operand 10 states and 135 transitions. [2024-06-20 16:41:40,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 139 transitions, 1481 flow [2024-06-20 16:41:40,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 139 transitions, 1340 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 16:41:40,586 INFO L231 Difference]: Finished difference. Result has 172 places, 129 transitions, 1176 flow [2024-06-20 16:41:40,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1176, PETRI_PLACES=172, PETRI_TRANSITIONS=129} [2024-06-20 16:41:40,586 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-20 16:41:40,586 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 129 transitions, 1176 flow [2024-06-20 16:41:40,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:40,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:40,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:40,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:41:40,587 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)] === [2024-06-20 16:41:40,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1211409315, now seen corresponding path program 12 times [2024-06-20 16:41:40,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:40,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225328928] [2024-06-20 16:41:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:41,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:41,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225328928] [2024-06-20 16:41:41,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225328928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:41,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:41,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:41,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979978375] [2024-06-20 16:41:41,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:41,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:41,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:41,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:41,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 129 transitions, 1176 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:41,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:41,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:41,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:42,073 INFO L124 PetriNetUnfolderBase]: 316/673 cut-off events. [2024-06-20 16:41:42,074 INFO L125 PetriNetUnfolderBase]: For 40167/40167 co-relation queries the response was YES. [2024-06-20 16:41:42,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4310 conditions, 673 events. 316/673 cut-off events. For 40167/40167 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3553 event pairs, 64 based on Foata normal form. 2/673 useless extension candidates. Maximal degree in co-relation 4228. Up to 383 conditions per place. [2024-06-20 16:41:42,079 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 64 changer transitions 0/146 dead transitions. [2024-06-20 16:41:42,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 146 transitions, 1706 flow [2024-06-20 16:41:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-20 16:41:42,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-20 16:41:42,080 INFO L175 Difference]: Start difference. First operand has 172 places, 129 transitions, 1176 flow. Second operand 10 states and 140 transitions. [2024-06-20 16:41:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 146 transitions, 1706 flow [2024-06-20 16:41:42,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 146 transitions, 1556 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:42,147 INFO L231 Difference]: Finished difference. Result has 174 places, 131 transitions, 1228 flow [2024-06-20 16:41:42,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1228, PETRI_PLACES=174, PETRI_TRANSITIONS=131} [2024-06-20 16:41:42,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-20 16:41:42,151 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 131 transitions, 1228 flow [2024-06-20 16:41:42,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:42,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:42,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:41:42,151 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)] === [2024-06-20 16:41:42,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 579424273, now seen corresponding path program 13 times [2024-06-20 16:41:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:42,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274462265] [2024-06-20 16:41:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:43,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:43,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274462265] [2024-06-20 16:41:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274462265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:43,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:43,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:43,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550630216] [2024-06-20 16:41:43,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:43,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:43,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:43,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:43,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:43,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 131 transitions, 1228 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:43,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:43,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:43,523 INFO L124 PetriNetUnfolderBase]: 303/647 cut-off events. [2024-06-20 16:41:43,524 INFO L125 PetriNetUnfolderBase]: For 38439/38439 co-relation queries the response was YES. [2024-06-20 16:41:43,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3650 conditions, 647 events. 303/647 cut-off events. For 38439/38439 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3420 event pairs, 58 based on Foata normal form. 10/656 useless extension candidates. Maximal degree in co-relation 3567. Up to 521 conditions per place. [2024-06-20 16:41:43,528 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 20 changer transitions 7/144 dead transitions. [2024-06-20 16:41:43,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 144 transitions, 1578 flow [2024-06-20 16:41:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-20 16:41:43,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-20 16:41:43,529 INFO L175 Difference]: Start difference. First operand has 174 places, 131 transitions, 1228 flow. Second operand 10 states and 130 transitions. [2024-06-20 16:41:43,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 144 transitions, 1578 flow [2024-06-20 16:41:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 144 transitions, 1420 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:41:43,601 INFO L231 Difference]: Finished difference. Result has 177 places, 127 transitions, 1084 flow [2024-06-20 16:41:43,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1084, PETRI_PLACES=177, PETRI_TRANSITIONS=127} [2024-06-20 16:41:43,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-20 16:41:43,602 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 127 transitions, 1084 flow [2024-06-20 16:41:43,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:43,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:43,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:43,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:41:43,603 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)] === [2024-06-20 16:41:43,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1620574947, now seen corresponding path program 14 times [2024-06-20 16:41:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:43,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531114100] [2024-06-20 16:41:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:43,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531114100] [2024-06-20 16:41:44,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531114100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:44,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:44,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:44,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102545852] [2024-06-20 16:41:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:44,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:44,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:44,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:44,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 127 transitions, 1084 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:44,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:44,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:44,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:45,106 INFO L124 PetriNetUnfolderBase]: 288/619 cut-off events. [2024-06-20 16:41:45,106 INFO L125 PetriNetUnfolderBase]: For 27847/27847 co-relation queries the response was YES. [2024-06-20 16:41:45,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 619 events. 288/619 cut-off events. For 27847/27847 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3230 event pairs, 55 based on Foata normal form. 2/618 useless extension candidates. Maximal degree in co-relation 3323. Up to 488 conditions per place. [2024-06-20 16:41:45,110 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 98 selfloop transitions, 36 changer transitions 0/138 dead transitions. [2024-06-20 16:41:45,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 138 transitions, 1408 flow [2024-06-20 16:41:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:41:45,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-20 16:41:45,112 INFO L175 Difference]: Start difference. First operand has 177 places, 127 transitions, 1084 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:41:45,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 138 transitions, 1408 flow [2024-06-20 16:41:45,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 138 transitions, 1340 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 16:41:45,167 INFO L231 Difference]: Finished difference. Result has 176 places, 128 transitions, 1128 flow [2024-06-20 16:41:45,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1128, PETRI_PLACES=176, PETRI_TRANSITIONS=128} [2024-06-20 16:41:45,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-20 16:41:45,167 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 128 transitions, 1128 flow [2024-06-20 16:41:45,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:45,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:45,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:45,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:41:45,168 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)] === [2024-06-20 16:41:45,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash -96757097, now seen corresponding path program 15 times [2024-06-20 16:41:45,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:45,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162098439] [2024-06-20 16:41:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:45,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:46,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162098439] [2024-06-20 16:41:46,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162098439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:46,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:46,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:46,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999486425] [2024-06-20 16:41:46,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:46,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:46,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:46,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 128 transitions, 1128 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:46,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:46,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:46,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:46,692 INFO L124 PetriNetUnfolderBase]: 321/682 cut-off events. [2024-06-20 16:41:46,692 INFO L125 PetriNetUnfolderBase]: For 44493/44493 co-relation queries the response was YES. [2024-06-20 16:41:46,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4404 conditions, 682 events. 321/682 cut-off events. For 44493/44493 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3634 event pairs, 66 based on Foata normal form. 2/682 useless extension candidates. Maximal degree in co-relation 4320. Up to 482 conditions per place. [2024-06-20 16:41:46,699 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 38 changer transitions 0/145 dead transitions. [2024-06-20 16:41:46,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 145 transitions, 1666 flow [2024-06-20 16:41:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-20 16:41:46,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43870967741935485 [2024-06-20 16:41:46,700 INFO L175 Difference]: Start difference. First operand has 176 places, 128 transitions, 1128 flow. Second operand 10 states and 136 transitions. [2024-06-20 16:41:46,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 145 transitions, 1666 flow [2024-06-20 16:41:46,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 145 transitions, 1564 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:41:46,792 INFO L231 Difference]: Finished difference. Result has 178 places, 130 transitions, 1180 flow [2024-06-20 16:41:46,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1180, PETRI_PLACES=178, PETRI_TRANSITIONS=130} [2024-06-20 16:41:46,792 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-20 16:41:46,793 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 130 transitions, 1180 flow [2024-06-20 16:41:46,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:46,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:46,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:46,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:41:46,793 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)] === [2024-06-20 16:41:46,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash 779614269, now seen corresponding path program 16 times [2024-06-20 16:41:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:46,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167521695] [2024-06-20 16:41:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:47,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:47,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167521695] [2024-06-20 16:41:47,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167521695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:47,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:47,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:47,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971357511] [2024-06-20 16:41:47,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:47,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:47,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 130 transitions, 1180 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:47,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:48,059 INFO L124 PetriNetUnfolderBase]: 308/663 cut-off events. [2024-06-20 16:41:48,059 INFO L125 PetriNetUnfolderBase]: For 42513/42513 co-relation queries the response was YES. [2024-06-20 16:41:48,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3711 conditions, 663 events. 308/663 cut-off events. For 42513/42513 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3549 event pairs, 61 based on Foata normal form. 10/671 useless extension candidates. Maximal degree in co-relation 3626. Up to 500 conditions per place. [2024-06-20 16:41:48,063 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 33 changer transitions 6/143 dead transitions. [2024-06-20 16:41:48,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 143 transitions, 1528 flow [2024-06-20 16:41:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-20 16:41:48,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-20 16:41:48,064 INFO L175 Difference]: Start difference. First operand has 178 places, 130 transitions, 1180 flow. Second operand 10 states and 133 transitions. [2024-06-20 16:41:48,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 143 transitions, 1528 flow [2024-06-20 16:41:48,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 143 transitions, 1422 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:41:48,148 INFO L231 Difference]: Finished difference. Result has 182 places, 127 transitions, 1120 flow [2024-06-20 16:41:48,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1120, PETRI_PLACES=182, PETRI_TRANSITIONS=127} [2024-06-20 16:41:48,149 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-20 16:41:48,149 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 127 transitions, 1120 flow [2024-06-20 16:41:48,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:48,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:48,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:48,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:41:48,150 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)] === [2024-06-20 16:41:48,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1331852705, now seen corresponding path program 17 times [2024-06-20 16:41:48,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:48,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244361913] [2024-06-20 16:41:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:48,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:49,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:49,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244361913] [2024-06-20 16:41:49,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244361913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:49,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:49,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736370030] [2024-06-20 16:41:49,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:49,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:49,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:49,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:49,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 127 transitions, 1120 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:49,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:49,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:49,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:49,598 INFO L124 PetriNetUnfolderBase]: 295/634 cut-off events. [2024-06-20 16:41:49,598 INFO L125 PetriNetUnfolderBase]: For 30987/30987 co-relation queries the response was YES. [2024-06-20 16:41:49,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3565 conditions, 634 events. 295/634 cut-off events. For 30987/30987 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3327 event pairs, 57 based on Foata normal form. 2/634 useless extension candidates. Maximal degree in co-relation 3478. Up to 521 conditions per place. [2024-06-20 16:41:49,603 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 112 selfloop transitions, 23 changer transitions 1/140 dead transitions. [2024-06-20 16:41:49,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 140 transitions, 1461 flow [2024-06-20 16:41:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-20 16:41:49,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-20 16:41:49,622 INFO L175 Difference]: Start difference. First operand has 182 places, 127 transitions, 1120 flow. Second operand 10 states and 127 transitions. [2024-06-20 16:41:49,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 140 transitions, 1461 flow [2024-06-20 16:41:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 140 transitions, 1354 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:41:49,701 INFO L231 Difference]: Finished difference. Result has 182 places, 128 transitions, 1109 flow [2024-06-20 16:41:49,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1109, PETRI_PLACES=182, PETRI_TRANSITIONS=128} [2024-06-20 16:41:49,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-06-20 16:41:49,701 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 128 transitions, 1109 flow [2024-06-20 16:41:49,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:49,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:49,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:49,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:41:49,702 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)] === [2024-06-20 16:41:49,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash -267574847, now seen corresponding path program 18 times [2024-06-20 16:41:49,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:49,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689938339] [2024-06-20 16:41:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:49,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:50,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689938339] [2024-06-20 16:41:50,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689938339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:50,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:50,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:41:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336175467] [2024-06-20 16:41:50,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:41:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:41:50,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:41:50,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:50,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 128 transitions, 1109 flow. Second operand has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:50,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:50,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:50,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:51,201 INFO L124 PetriNetUnfolderBase]: 281/598 cut-off events. [2024-06-20 16:41:51,201 INFO L125 PetriNetUnfolderBase]: For 28297/28297 co-relation queries the response was YES. [2024-06-20 16:41:51,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 598 events. 281/598 cut-off events. For 28297/28297 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3102 event pairs, 53 based on Foata normal form. 2/596 useless extension candidates. Maximal degree in co-relation 3144. Up to 479 conditions per place. [2024-06-20 16:41:51,205 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-20 16:41:51,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 140 transitions, 1407 flow [2024-06-20 16:41:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:41:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:41:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-20 16:41:51,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-20 16:41:51,207 INFO L175 Difference]: Start difference. First operand has 182 places, 128 transitions, 1109 flow. Second operand 10 states and 126 transitions. [2024-06-20 16:41:51,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 140 transitions, 1407 flow [2024-06-20 16:41:51,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 140 transitions, 1316 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:41:51,273 INFO L231 Difference]: Finished difference. Result has 186 places, 128 transitions, 1066 flow [2024-06-20 16:41:51,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1066, PETRI_PLACES=186, PETRI_TRANSITIONS=128} [2024-06-20 16:41:51,273 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-20 16:41:51,274 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 128 transitions, 1066 flow [2024-06-20 16:41:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.272727272727273) internal successors, (102), 11 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:51,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:51,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:51,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:41:51,275 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)] === [2024-06-20 16:41:51,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:51,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1165434351, now seen corresponding path program 4 times [2024-06-20 16:41:51,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:51,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813588511] [2024-06-20 16:41:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:51,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:52,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813588511] [2024-06-20 16:41:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813588511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:52,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:41:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806484357] [2024-06-20 16:41:52,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:52,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:41:52,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:41:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:41:52,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:52,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 128 transitions, 1066 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:52,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:52,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:52,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:53,324 INFO L124 PetriNetUnfolderBase]: 293/632 cut-off events. [2024-06-20 16:41:53,324 INFO L125 PetriNetUnfolderBase]: For 38395/38395 co-relation queries the response was YES. [2024-06-20 16:41:53,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 632 events. 293/632 cut-off events. For 38395/38395 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3337 event pairs, 58 based on Foata normal form. 8/638 useless extension candidates. Maximal degree in co-relation 3209. Up to 473 conditions per place. [2024-06-20 16:41:53,328 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 98 selfloop transitions, 27 changer transitions 13/142 dead transitions. [2024-06-20 16:41:53,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 142 transitions, 1414 flow [2024-06-20 16:41:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-20 16:41:53,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-20 16:41:53,337 INFO L175 Difference]: Start difference. First operand has 186 places, 128 transitions, 1066 flow. Second operand 11 states and 144 transitions. [2024-06-20 16:41:53,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 142 transitions, 1414 flow [2024-06-20 16:41:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 142 transitions, 1258 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-20 16:41:53,424 INFO L231 Difference]: Finished difference. Result has 186 places, 122 transitions, 933 flow [2024-06-20 16:41:53,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=933, PETRI_PLACES=186, PETRI_TRANSITIONS=122} [2024-06-20 16:41:53,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-20 16:41:53,424 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 122 transitions, 933 flow [2024-06-20 16:41:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:53,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:53,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:41:53,425 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)] === [2024-06-20 16:41:53,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash 696291743, now seen corresponding path program 5 times [2024-06-20 16:41:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343978924] [2024-06-20 16:41:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:54,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:54,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343978924] [2024-06-20 16:41:54,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343978924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:54,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:54,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:41:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564499093] [2024-06-20 16:41:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:54,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:41:54,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:41:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:41:55,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:55,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 122 transitions, 933 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:55,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:55,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:55,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:55,317 INFO L124 PetriNetUnfolderBase]: 299/654 cut-off events. [2024-06-20 16:41:55,318 INFO L125 PetriNetUnfolderBase]: For 49546/49546 co-relation queries the response was YES. [2024-06-20 16:41:55,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3667 conditions, 654 events. 299/654 cut-off events. For 49546/49546 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3506 event pairs, 66 based on Foata normal form. 6/658 useless extension candidates. Maximal degree in co-relation 3580. Up to 382 conditions per place. [2024-06-20 16:41:55,322 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 47 changer transitions 7/140 dead transitions. [2024-06-20 16:41:55,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 140 transitions, 1429 flow [2024-06-20 16:41:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 150 transitions. [2024-06-20 16:41:55,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398826979472141 [2024-06-20 16:41:55,323 INFO L175 Difference]: Start difference. First operand has 186 places, 122 transitions, 933 flow. Second operand 11 states and 150 transitions. [2024-06-20 16:41:55,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 140 transitions, 1429 flow [2024-06-20 16:41:55,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 140 transitions, 1319 flow, removed 18 selfloop flow, removed 13 redundant places. [2024-06-20 16:41:55,409 INFO L231 Difference]: Finished difference. Result has 178 places, 119 transitions, 924 flow [2024-06-20 16:41:55,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=924, PETRI_PLACES=178, PETRI_TRANSITIONS=119} [2024-06-20 16:41:55,410 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-20 16:41:55,410 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 119 transitions, 924 flow [2024-06-20 16:41:55,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:55,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:55,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:55,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:41:55,410 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)] === [2024-06-20 16:41:55,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1439495039, now seen corresponding path program 6 times [2024-06-20 16:41:55,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:55,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767274841] [2024-06-20 16:41:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:55,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:56,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:56,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767274841] [2024-06-20 16:41:56,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767274841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:56,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:56,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:41:56,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931823025] [2024-06-20 16:41:56,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:56,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:41:56,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:41:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:41:57,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:57,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 119 transitions, 924 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:57,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:57,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:57,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:57,365 INFO L124 PetriNetUnfolderBase]: 296/645 cut-off events. [2024-06-20 16:41:57,366 INFO L125 PetriNetUnfolderBase]: For 46201/46201 co-relation queries the response was YES. [2024-06-20 16:41:57,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 645 events. 296/645 cut-off events. For 46201/46201 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3441 event pairs, 70 based on Foata normal form. 8/651 useless extension candidates. Maximal degree in co-relation 3444. Up to 447 conditions per place. [2024-06-20 16:41:57,370 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 40 changer transitions 7/133 dead transitions. [2024-06-20 16:41:57,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 133 transitions, 1246 flow [2024-06-20 16:41:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-20 16:41:57,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-20 16:41:57,371 INFO L175 Difference]: Start difference. First operand has 178 places, 119 transitions, 924 flow. Second operand 11 states and 146 transitions. [2024-06-20 16:41:57,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 133 transitions, 1246 flow [2024-06-20 16:41:57,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 133 transitions, 1152 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:41:57,445 INFO L231 Difference]: Finished difference. Result has 176 places, 116 transitions, 896 flow [2024-06-20 16:41:57,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=896, PETRI_PLACES=176, PETRI_TRANSITIONS=116} [2024-06-20 16:41:57,445 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-20 16:41:57,445 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 116 transitions, 896 flow [2024-06-20 16:41:57,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:57,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:57,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:57,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:41:57,446 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)] === [2024-06-20 16:41:57,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1211593889, now seen corresponding path program 7 times [2024-06-20 16:41:57,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:57,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739717984] [2024-06-20 16:41:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:57,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:41:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:41:58,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:41:58,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739717984] [2024-06-20 16:41:58,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739717984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:41:58,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:41:58,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:41:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731263475] [2024-06-20 16:41:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:41:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:41:58,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:41:58,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:41:58,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:41:59,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:41:59,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 116 transitions, 896 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:41:59,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:41:59,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:41:59,501 INFO L124 PetriNetUnfolderBase]: 269/592 cut-off events. [2024-06-20 16:41:59,502 INFO L125 PetriNetUnfolderBase]: For 33065/33065 co-relation queries the response was YES. [2024-06-20 16:41:59,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2839 conditions, 592 events. 269/592 cut-off events. For 33065/33065 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3110 event pairs, 58 based on Foata normal form. 8/598 useless extension candidates. Maximal degree in co-relation 2758. Up to 382 conditions per place. [2024-06-20 16:41:59,505 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 73 selfloop transitions, 44 changer transitions 9/130 dead transitions. [2024-06-20 16:41:59,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 130 transitions, 1212 flow [2024-06-20 16:41:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:41:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:41:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-20 16:41:59,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310850439882698 [2024-06-20 16:41:59,507 INFO L175 Difference]: Start difference. First operand has 176 places, 116 transitions, 896 flow. Second operand 11 states and 147 transitions. [2024-06-20 16:41:59,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 130 transitions, 1212 flow [2024-06-20 16:41:59,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 130 transitions, 1126 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 16:41:59,560 INFO L231 Difference]: Finished difference. Result has 174 places, 113 transitions, 882 flow [2024-06-20 16:41:59,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=882, PETRI_PLACES=174, PETRI_TRANSITIONS=113} [2024-06-20 16:41:59,561 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-20 16:41:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 113 transitions, 882 flow [2024-06-20 16:41:59,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:41:59,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:41:59,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:41:59,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:41:59,561 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)] === [2024-06-20 16:41:59,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:41:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash -750491261, now seen corresponding path program 8 times [2024-06-20 16:41:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:41:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690011892] [2024-06-20 16:41:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:41:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:41:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:00,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:00,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690011892] [2024-06-20 16:42:00,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690011892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:00,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:00,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:00,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231897613] [2024-06-20 16:42:00,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:00,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:00,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:00,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 113 transitions, 882 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:00,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:00,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:00,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:01,350 INFO L124 PetriNetUnfolderBase]: 282/626 cut-off events. [2024-06-20 16:42:01,350 INFO L125 PetriNetUnfolderBase]: For 39584/39584 co-relation queries the response was YES. [2024-06-20 16:42:01,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3385 conditions, 626 events. 282/626 cut-off events. For 39584/39584 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3347 event pairs, 69 based on Foata normal form. 6/631 useless extension candidates. Maximal degree in co-relation 3305. Up to 461 conditions per place. [2024-06-20 16:42:01,354 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 17 changer transitions 7/131 dead transitions. [2024-06-20 16:42:01,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 131 transitions, 1338 flow [2024-06-20 16:42:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-20 16:42:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-20 16:42:01,355 INFO L175 Difference]: Start difference. First operand has 174 places, 113 transitions, 882 flow. Second operand 11 states and 142 transitions. [2024-06-20 16:42:01,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 131 transitions, 1338 flow [2024-06-20 16:42:01,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 131 transitions, 1242 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:42:01,431 INFO L231 Difference]: Finished difference. Result has 171 places, 110 transitions, 801 flow [2024-06-20 16:42:01,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=801, PETRI_PLACES=171, PETRI_TRANSITIONS=110} [2024-06-20 16:42:01,432 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-20 16:42:01,432 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 110 transitions, 801 flow [2024-06-20 16:42:01,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:01,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:01,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:01,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:42:01,433 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)] === [2024-06-20 16:42:01,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2028174173, now seen corresponding path program 9 times [2024-06-20 16:42:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696490809] [2024-06-20 16:42:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:02,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:02,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696490809] [2024-06-20 16:42:02,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696490809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:02,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:02,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:02,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525996337] [2024-06-20 16:42:02,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:02,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:02,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:02,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:02,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:02,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:02,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 110 transitions, 801 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:02,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:02,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:02,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:02,924 INFO L124 PetriNetUnfolderBase]: 290/650 cut-off events. [2024-06-20 16:42:02,925 INFO L125 PetriNetUnfolderBase]: For 46230/46230 co-relation queries the response was YES. [2024-06-20 16:42:02,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3711 conditions, 650 events. 290/650 cut-off events. For 46230/46230 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3529 event pairs, 78 based on Foata normal form. 6/655 useless extension candidates. Maximal degree in co-relation 3632. Up to 433 conditions per place. [2024-06-20 16:42:02,929 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 16 changer transitions 9/130 dead transitions. [2024-06-20 16:42:02,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 130 transitions, 1257 flow [2024-06-20 16:42:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:42:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:42:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-20 16:42:02,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-20 16:42:02,930 INFO L175 Difference]: Start difference. First operand has 171 places, 110 transitions, 801 flow. Second operand 12 states and 152 transitions. [2024-06-20 16:42:02,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 130 transitions, 1257 flow [2024-06-20 16:42:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 130 transitions, 1217 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:03,002 INFO L231 Difference]: Finished difference. Result has 169 places, 107 transitions, 780 flow [2024-06-20 16:42:03,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=780, PETRI_PLACES=169, PETRI_TRANSITIONS=107} [2024-06-20 16:42:03,003 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-20 16:42:03,003 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 107 transitions, 780 flow [2024-06-20 16:42:03,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:03,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:03,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:03,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:42:03,004 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)] === [2024-06-20 16:42:03,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:03,004 INFO L85 PathProgramCache]: Analyzing trace with hash 828190345, now seen corresponding path program 10 times [2024-06-20 16:42:03,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:03,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003362891] [2024-06-20 16:42:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:04,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:04,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003362891] [2024-06-20 16:42:04,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003362891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:04,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:04,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:04,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223177834] [2024-06-20 16:42:04,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:04,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:04,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:04,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:04,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:04,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 107 transitions, 780 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:04,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:04,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:04,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:04,373 INFO L124 PetriNetUnfolderBase]: 265/591 cut-off events. [2024-06-20 16:42:04,374 INFO L125 PetriNetUnfolderBase]: For 37950/37950 co-relation queries the response was YES. [2024-06-20 16:42:04,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 591 events. 265/591 cut-off events. For 37950/37950 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3105 event pairs, 65 based on Foata normal form. 6/596 useless extension candidates. Maximal degree in co-relation 3116. Up to 483 conditions per place. [2024-06-20 16:42:04,377 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 93 selfloop transitions, 14 changer transitions 11/122 dead transitions. [2024-06-20 16:42:04,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 122 transitions, 1070 flow [2024-06-20 16:42:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:42:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:42:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-20 16:42:04,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-20 16:42:04,378 INFO L175 Difference]: Start difference. First operand has 169 places, 107 transitions, 780 flow. Second operand 12 states and 146 transitions. [2024-06-20 16:42:04,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 122 transitions, 1070 flow [2024-06-20 16:42:04,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 122 transitions, 1035 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:04,444 INFO L231 Difference]: Finished difference. Result has 166 places, 103 transitions, 752 flow [2024-06-20 16:42:04,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=752, PETRI_PLACES=166, PETRI_TRANSITIONS=103} [2024-06-20 16:42:04,444 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-20 16:42:04,444 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 103 transitions, 752 flow [2024-06-20 16:42:04,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:04,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:04,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:04,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:42:04,445 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)] === [2024-06-20 16:42:04,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 557976173, now seen corresponding path program 11 times [2024-06-20 16:42:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:04,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64064098] [2024-06-20 16:42:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:04,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:05,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:05,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64064098] [2024-06-20 16:42:05,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64064098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:05,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:05,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775229862] [2024-06-20 16:42:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:05,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:05,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:05,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:05,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 103 transitions, 752 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:05,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:05,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:05,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:06,018 INFO L124 PetriNetUnfolderBase]: 261/578 cut-off events. [2024-06-20 16:42:06,018 INFO L125 PetriNetUnfolderBase]: For 38306/38306 co-relation queries the response was YES. [2024-06-20 16:42:06,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 578 events. 261/578 cut-off events. For 38306/38306 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3000 event pairs, 68 based on Foata normal form. 8/583 useless extension candidates. Maximal degree in co-relation 3057. Up to 431 conditions per place. [2024-06-20 16:42:06,022 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 23 changer transitions 12/116 dead transitions. [2024-06-20 16:42:06,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 116 transitions, 1038 flow [2024-06-20 16:42:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:42:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:42:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-20 16:42:06,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-20 16:42:06,023 INFO L175 Difference]: Start difference. First operand has 166 places, 103 transitions, 752 flow. Second operand 10 states and 133 transitions. [2024-06-20 16:42:06,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 116 transitions, 1038 flow [2024-06-20 16:42:06,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 116 transitions, 1000 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:06,079 INFO L231 Difference]: Finished difference. Result has 159 places, 97 transitions, 731 flow [2024-06-20 16:42:06,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=731, PETRI_PLACES=159, PETRI_TRANSITIONS=97} [2024-06-20 16:42:06,080 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2024-06-20 16:42:06,080 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 97 transitions, 731 flow [2024-06-20 16:42:06,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:06,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:06,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:06,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:42:06,080 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)] === [2024-06-20 16:42:06,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:06,081 INFO L85 PathProgramCache]: Analyzing trace with hash 542563165, now seen corresponding path program 12 times [2024-06-20 16:42:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:06,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467307014] [2024-06-20 16:42:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467307014] [2024-06-20 16:42:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467307014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:07,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:07,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925608475] [2024-06-20 16:42:07,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:07,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:07,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:07,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:07,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:07,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:07,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 97 transitions, 731 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:07,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:07,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:07,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:07,734 INFO L124 PetriNetUnfolderBase]: 227/511 cut-off events. [2024-06-20 16:42:07,735 INFO L125 PetriNetUnfolderBase]: For 26497/26497 co-relation queries the response was YES. [2024-06-20 16:42:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 511 events. 227/511 cut-off events. For 26497/26497 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2578 event pairs, 59 based on Foata normal form. 8/518 useless extension candidates. Maximal degree in co-relation 2363. Up to 407 conditions per place. [2024-06-20 16:42:07,738 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 87 selfloop transitions, 13 changer transitions 7/111 dead transitions. [2024-06-20 16:42:07,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 111 transitions, 1007 flow [2024-06-20 16:42:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-20 16:42:07,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-20 16:42:07,739 INFO L175 Difference]: Start difference. First operand has 159 places, 97 transitions, 731 flow. Second operand 11 states and 134 transitions. [2024-06-20 16:42:07,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 111 transitions, 1007 flow [2024-06-20 16:42:07,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 111 transitions, 953 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:07,778 INFO L231 Difference]: Finished difference. Result has 154 places, 94 transitions, 687 flow [2024-06-20 16:42:07,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=687, PETRI_PLACES=154, PETRI_TRANSITIONS=94} [2024-06-20 16:42:07,779 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-20 16:42:07,779 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 94 transitions, 687 flow [2024-06-20 16:42:07,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:07,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:07,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:07,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:42:07,779 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)] === [2024-06-20 16:42:07,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 36417917, now seen corresponding path program 13 times [2024-06-20 16:42:07,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:07,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779492054] [2024-06-20 16:42:07,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:07,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:08,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:08,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779492054] [2024-06-20 16:42:08,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779492054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:08,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488661001] [2024-06-20 16:42:08,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:09,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:09,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 94 transitions, 687 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:09,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:09,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:09,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:09,336 INFO L124 PetriNetUnfolderBase]: 226/517 cut-off events. [2024-06-20 16:42:09,336 INFO L125 PetriNetUnfolderBase]: For 24431/24431 co-relation queries the response was YES. [2024-06-20 16:42:09,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 517 events. 226/517 cut-off events. For 24431/24431 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2570 event pairs, 62 based on Foata normal form. 6/520 useless extension candidates. Maximal degree in co-relation 2425. Up to 345 conditions per place. [2024-06-20 16:42:09,339 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 76 selfloop transitions, 21 changer transitions 9/110 dead transitions. [2024-06-20 16:42:09,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 110 transitions, 1035 flow [2024-06-20 16:42:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-20 16:42:09,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-20 16:42:09,340 INFO L175 Difference]: Start difference. First operand has 154 places, 94 transitions, 687 flow. Second operand 11 states and 142 transitions. [2024-06-20 16:42:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 110 transitions, 1035 flow [2024-06-20 16:42:09,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 110 transitions, 995 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:09,385 INFO L231 Difference]: Finished difference. Result has 150 places, 89 transitions, 649 flow [2024-06-20 16:42:09,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=649, PETRI_PLACES=150, PETRI_TRANSITIONS=89} [2024-06-20 16:42:09,386 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-20 16:42:09,386 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 89 transitions, 649 flow [2024-06-20 16:42:09,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:09,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:09,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:09,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:42:09,386 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)] === [2024-06-20 16:42:09,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash 65356078, now seen corresponding path program 1 times [2024-06-20 16:42:09,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:09,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711942614] [2024-06-20 16:42:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711942614] [2024-06-20 16:42:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711942614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:10,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:10,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:10,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223830741] [2024-06-20 16:42:10,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:10,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:10,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:10,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:10,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 89 transitions, 649 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:10,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:10,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:10,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:10,820 INFO L124 PetriNetUnfolderBase]: 218/499 cut-off events. [2024-06-20 16:42:10,821 INFO L125 PetriNetUnfolderBase]: For 23624/23624 co-relation queries the response was YES. [2024-06-20 16:42:10,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2407 conditions, 499 events. 218/499 cut-off events. For 23624/23624 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2438 event pairs, 53 based on Foata normal form. 6/504 useless extension candidates. Maximal degree in co-relation 2338. Up to 353 conditions per place. [2024-06-20 16:42:10,823 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 69 selfloop transitions, 7 changer transitions 30/110 dead transitions. [2024-06-20 16:42:10,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 110 transitions, 919 flow [2024-06-20 16:42:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-20 16:42:10,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-20 16:42:10,824 INFO L175 Difference]: Start difference. First operand has 150 places, 89 transitions, 649 flow. Second operand 11 states and 139 transitions. [2024-06-20 16:42:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 110 transitions, 919 flow [2024-06-20 16:42:10,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 110 transitions, 812 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-06-20 16:42:10,858 INFO L231 Difference]: Finished difference. Result has 143 places, 76 transitions, 488 flow [2024-06-20 16:42:10,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=488, PETRI_PLACES=143, PETRI_TRANSITIONS=76} [2024-06-20 16:42:10,858 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-20 16:42:10,858 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 76 transitions, 488 flow [2024-06-20 16:42:10,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:10,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:10,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:10,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:42:10,859 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)] === [2024-06-20 16:42:10,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 561943594, now seen corresponding path program 2 times [2024-06-20 16:42:10,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:10,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337946504] [2024-06-20 16:42:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:12,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337946504] [2024-06-20 16:42:12,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337946504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:12,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:12,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775484479] [2024-06-20 16:42:12,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:12,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:12,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:12,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:12,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 76 transitions, 488 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:12,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:12,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:12,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:12,413 INFO L124 PetriNetUnfolderBase]: 183/422 cut-off events. [2024-06-20 16:42:12,413 INFO L125 PetriNetUnfolderBase]: For 22708/22710 co-relation queries the response was YES. [2024-06-20 16:42:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 422 events. 183/422 cut-off events. For 22708/22710 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1965 event pairs, 49 based on Foata normal form. 8/429 useless extension candidates. Maximal degree in co-relation 1943. Up to 292 conditions per place. [2024-06-20 16:42:12,415 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 60 selfloop transitions, 16 changer transitions 11/91 dead transitions. [2024-06-20 16:42:12,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 91 transitions, 700 flow [2024-06-20 16:42:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-20 16:42:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-20 16:42:12,416 INFO L175 Difference]: Start difference. First operand has 143 places, 76 transitions, 488 flow. Second operand 11 states and 134 transitions. [2024-06-20 16:42:12,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 91 transitions, 700 flow [2024-06-20 16:42:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 91 transitions, 663 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-20 16:42:12,439 INFO L231 Difference]: Finished difference. Result has 127 places, 71 transitions, 456 flow [2024-06-20 16:42:12,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=456, PETRI_PLACES=127, PETRI_TRANSITIONS=71} [2024-06-20 16:42:12,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-20 16:42:12,440 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 71 transitions, 456 flow [2024-06-20 16:42:12,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:12,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:12,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:12,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:42:12,440 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)] === [2024-06-20 16:42:12,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash -930789748, now seen corresponding path program 3 times [2024-06-20 16:42:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985907183] [2024-06-20 16:42:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:13,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:13,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985907183] [2024-06-20 16:42:13,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985907183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:13,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:13,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968526425] [2024-06-20 16:42:13,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:13,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:13,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:13,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:13,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 71 transitions, 456 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:13,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:13,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:13,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:13,873 INFO L124 PetriNetUnfolderBase]: 155/364 cut-off events. [2024-06-20 16:42:13,873 INFO L125 PetriNetUnfolderBase]: For 14083/14085 co-relation queries the response was YES. [2024-06-20 16:42:13,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 364 events. 155/364 cut-off events. For 14083/14085 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1624 event pairs, 38 based on Foata normal form. 8/371 useless extension candidates. Maximal degree in co-relation 1490. Up to 255 conditions per place. [2024-06-20 16:42:13,875 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 55 selfloop transitions, 11 changer transitions 15/85 dead transitions. [2024-06-20 16:42:13,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 85 transitions, 654 flow [2024-06-20 16:42:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 16:42:13,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-20 16:42:13,876 INFO L175 Difference]: Start difference. First operand has 127 places, 71 transitions, 456 flow. Second operand 11 states and 131 transitions. [2024-06-20 16:42:13,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 85 transitions, 654 flow [2024-06-20 16:42:13,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 85 transitions, 614 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:42:13,892 INFO L231 Difference]: Finished difference. Result has 121 places, 64 transitions, 394 flow [2024-06-20 16:42:13,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=394, PETRI_PLACES=121, PETRI_TRANSITIONS=64} [2024-06-20 16:42:13,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-20 16:42:13,892 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 64 transitions, 394 flow [2024-06-20 16:42:13,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:13,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:42:13,893 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)] === [2024-06-20 16:42:13,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1988515572, now seen corresponding path program 4 times [2024-06-20 16:42:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:13,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102141640] [2024-06-20 16:42:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:15,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:15,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102141640] [2024-06-20 16:42:15,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102141640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:15,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:15,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:15,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903697980] [2024-06-20 16:42:15,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:15,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:15,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:15,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 64 transitions, 394 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:15,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:15,464 INFO L124 PetriNetUnfolderBase]: 143/338 cut-off events. [2024-06-20 16:42:15,464 INFO L125 PetriNetUnfolderBase]: For 12017/12019 co-relation queries the response was YES. [2024-06-20 16:42:15,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 338 events. 143/338 cut-off events. For 12017/12019 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1472 event pairs, 36 based on Foata normal form. 8/345 useless extension candidates. Maximal degree in co-relation 1356. Up to 235 conditions per place. [2024-06-20 16:42:15,465 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 46 selfloop transitions, 3 changer transitions 26/79 dead transitions. [2024-06-20 16:42:15,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 79 transitions, 582 flow [2024-06-20 16:42:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-20 16:42:15,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-20 16:42:15,466 INFO L175 Difference]: Start difference. First operand has 121 places, 64 transitions, 394 flow. Second operand 11 states and 130 transitions. [2024-06-20 16:42:15,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 79 transitions, 582 flow [2024-06-20 16:42:15,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 79 transitions, 540 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 16:42:15,478 INFO L231 Difference]: Finished difference. Result has 112 places, 52 transitions, 291 flow [2024-06-20 16:42:15,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=291, PETRI_PLACES=112, PETRI_TRANSITIONS=52} [2024-06-20 16:42:15,479 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-20 16:42:15,479 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 52 transitions, 291 flow [2024-06-20 16:42:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:15,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:15,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:15,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:42:15,480 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)] === [2024-06-20 16:42:15,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1774447526, now seen corresponding path program 5 times [2024-06-20 16:42:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:15,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180219662] [2024-06-20 16:42:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:15,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:16,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180219662] [2024-06-20 16:42:16,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180219662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:16,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:16,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:16,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010391288] [2024-06-20 16:42:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:16,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:16,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:16,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:17,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:17,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 52 transitions, 291 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:17,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:17,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:17,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:17,312 INFO L124 PetriNetUnfolderBase]: 122/279 cut-off events. [2024-06-20 16:42:17,312 INFO L125 PetriNetUnfolderBase]: For 10210/10214 co-relation queries the response was YES. [2024-06-20 16:42:17,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 279 events. 122/279 cut-off events. For 10210/10214 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1120 event pairs, 34 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 1124. Up to 196 conditions per place. [2024-06-20 16:42:17,313 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 9 changer transitions 14/65 dead transitions. [2024-06-20 16:42:17,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 65 transitions, 443 flow [2024-06-20 16:42:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 16:42:17,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-20 16:42:17,314 INFO L175 Difference]: Start difference. First operand has 112 places, 52 transitions, 291 flow. Second operand 11 states and 131 transitions. [2024-06-20 16:42:17,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 65 transitions, 443 flow [2024-06-20 16:42:17,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 65 transitions, 421 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:17,321 INFO L231 Difference]: Finished difference. Result has 95 places, 47 transitions, 266 flow [2024-06-20 16:42:17,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=266, PETRI_PLACES=95, PETRI_TRANSITIONS=47} [2024-06-20 16:42:17,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-20 16:42:17,321 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 47 transitions, 266 flow [2024-06-20 16:42:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:17,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:17,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:17,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:42:17,322 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)] === [2024-06-20 16:42:17,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:17,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1667746416, now seen corresponding path program 6 times [2024-06-20 16:42:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:17,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214244537] [2024-06-20 16:42:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:18,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214244537] [2024-06-20 16:42:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214244537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:18,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:18,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840476415] [2024-06-20 16:42:18,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:18,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:19,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:19,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 47 transitions, 266 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:19,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:19,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:19,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:19,247 INFO L124 PetriNetUnfolderBase]: 95/220 cut-off events. [2024-06-20 16:42:19,248 INFO L125 PetriNetUnfolderBase]: For 4982/4986 co-relation queries the response was YES. [2024-06-20 16:42:19,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 220 events. 95/220 cut-off events. For 4982/4986 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 807 event pairs, 27 based on Foata normal form. 10/230 useless extension candidates. Maximal degree in co-relation 754. Up to 153 conditions per place. [2024-06-20 16:42:19,249 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 36 selfloop transitions, 9 changer transitions 8/57 dead transitions. [2024-06-20 16:42:19,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 57 transitions, 396 flow [2024-06-20 16:42:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:42:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:42:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:42:19,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-20 16:42:19,250 INFO L175 Difference]: Start difference. First operand has 95 places, 47 transitions, 266 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:42:19,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 57 transitions, 396 flow [2024-06-20 16:42:19,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 57 transitions, 367 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:19,254 INFO L231 Difference]: Finished difference. Result has 87 places, 44 transitions, 243 flow [2024-06-20 16:42:19,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=243, PETRI_PLACES=87, PETRI_TRANSITIONS=44} [2024-06-20 16:42:19,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-20 16:42:19,255 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 44 transitions, 243 flow [2024-06-20 16:42:19,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:19,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:19,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:19,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:42:19,256 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)] === [2024-06-20 16:42:19,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:19,256 INFO L85 PathProgramCache]: Analyzing trace with hash -901570178, now seen corresponding path program 7 times [2024-06-20 16:42:19,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:19,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143870144] [2024-06-20 16:42:19,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:19,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:20,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:20,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143870144] [2024-06-20 16:42:20,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143870144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:20,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:20,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:20,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130559990] [2024-06-20 16:42:20,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:20,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:20,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:20,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:20,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 44 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:20,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:20,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:21,090 INFO L124 PetriNetUnfolderBase]: 88/207 cut-off events. [2024-06-20 16:42:21,090 INFO L125 PetriNetUnfolderBase]: For 3998/4002 co-relation queries the response was YES. [2024-06-20 16:42:21,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 207 events. 88/207 cut-off events. For 3998/4002 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 739 event pairs, 21 based on Foata normal form. 10/217 useless extension candidates. Maximal degree in co-relation 696. Up to 116 conditions per place. [2024-06-20 16:42:21,091 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 28 selfloop transitions, 13 changer transitions 11/56 dead transitions. [2024-06-20 16:42:21,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 56 transitions, 375 flow [2024-06-20 16:42:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-20 16:42:21,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-20 16:42:21,092 INFO L175 Difference]: Start difference. First operand has 87 places, 44 transitions, 243 flow. Second operand 11 states and 130 transitions. [2024-06-20 16:42:21,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 56 transitions, 375 flow [2024-06-20 16:42:21,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 56 transitions, 351 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:42:21,096 INFO L231 Difference]: Finished difference. Result has 83 places, 40 transitions, 228 flow [2024-06-20 16:42:21,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=228, PETRI_PLACES=83, PETRI_TRANSITIONS=40} [2024-06-20 16:42:21,097 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-20 16:42:21,097 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 40 transitions, 228 flow [2024-06-20 16:42:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:21,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:21,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:42:21,098 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)] === [2024-06-20 16:42:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1095509588, now seen corresponding path program 8 times [2024-06-20 16:42:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749207346] [2024-06-20 16:42:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:23,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:23,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749207346] [2024-06-20 16:42:23,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749207346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:23,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:23,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:23,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934036251] [2024-06-20 16:42:23,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:23,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:23,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:23,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:23,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 40 transitions, 228 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:23,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:23,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:23,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:23,432 INFO L124 PetriNetUnfolderBase]: 80/189 cut-off events. [2024-06-20 16:42:23,433 INFO L125 PetriNetUnfolderBase]: For 3418/3422 co-relation queries the response was YES. [2024-06-20 16:42:23,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 189 events. 80/189 cut-off events. For 3418/3422 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 631 event pairs, 21 based on Foata normal form. 10/199 useless extension candidates. Maximal degree in co-relation 644. Up to 106 conditions per place. [2024-06-20 16:42:23,434 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 25 selfloop transitions, 13 changer transitions 10/52 dead transitions. [2024-06-20 16:42:23,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 52 transitions, 352 flow [2024-06-20 16:42:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:23,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 16:42:23,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-20 16:42:23,435 INFO L175 Difference]: Start difference. First operand has 83 places, 40 transitions, 228 flow. Second operand 11 states and 128 transitions. [2024-06-20 16:42:23,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 52 transitions, 352 flow [2024-06-20 16:42:23,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 52 transitions, 314 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 16:42:23,438 INFO L231 Difference]: Finished difference. Result has 77 places, 37 transitions, 207 flow [2024-06-20 16:42:23,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=207, PETRI_PLACES=77, PETRI_TRANSITIONS=37} [2024-06-20 16:42:23,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 47 predicate places. [2024-06-20 16:42:23,439 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 37 transitions, 207 flow [2024-06-20 16:42:23,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:23,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:23,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:23,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:42:23,439 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)] === [2024-06-20 16:42:23,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1101016118, now seen corresponding path program 9 times [2024-06-20 16:42:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:23,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991331258] [2024-06-20 16:42:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:25,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991331258] [2024-06-20 16:42:25,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991331258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:25,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:25,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:25,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471799776] [2024-06-20 16:42:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:25,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:25,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 37 transitions, 207 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:25,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:25,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:25,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:25,300 INFO L124 PetriNetUnfolderBase]: 73/176 cut-off events. [2024-06-20 16:42:25,300 INFO L125 PetriNetUnfolderBase]: For 2729/2733 co-relation queries the response was YES. [2024-06-20 16:42:25,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 176 events. 73/176 cut-off events. For 2729/2733 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 572 event pairs, 17 based on Foata normal form. 10/186 useless extension candidates. Maximal degree in co-relation 580. Up to 82 conditions per place. [2024-06-20 16:42:25,301 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 24 selfloop transitions, 11 changer transitions 11/50 dead transitions. [2024-06-20 16:42:25,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 50 transitions, 327 flow [2024-06-20 16:42:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 16:42:25,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-20 16:42:25,302 INFO L175 Difference]: Start difference. First operand has 77 places, 37 transitions, 207 flow. Second operand 11 states and 129 transitions. [2024-06-20 16:42:25,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 50 transitions, 327 flow [2024-06-20 16:42:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 50 transitions, 295 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 16:42:25,305 INFO L231 Difference]: Finished difference. Result has 73 places, 32 transitions, 174 flow [2024-06-20 16:42:25,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=174, PETRI_PLACES=73, PETRI_TRANSITIONS=32} [2024-06-20 16:42:25,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-20 16:42:25,305 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 32 transitions, 174 flow [2024-06-20 16:42:25,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:25,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:25,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:42:25,306 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)] === [2024-06-20 16:42:25,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash 782284060, now seen corresponding path program 10 times [2024-06-20 16:42:25,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:25,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022556848] [2024-06-20 16:42:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:27,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:27,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022556848] [2024-06-20 16:42:27,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022556848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:27,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:27,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:27,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669843671] [2024-06-20 16:42:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:27,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:27,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:27,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 32 transitions, 174 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:27,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:27,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:27,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:27,480 INFO L124 PetriNetUnfolderBase]: 61/148 cut-off events. [2024-06-20 16:42:27,480 INFO L125 PetriNetUnfolderBase]: For 2204/2208 co-relation queries the response was YES. [2024-06-20 16:42:27,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 148 events. 61/148 cut-off events. For 2204/2208 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 433 event pairs, 19 based on Foata normal form. 6/154 useless extension candidates. Maximal degree in co-relation 494. Up to 87 conditions per place. [2024-06-20 16:42:27,481 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 20 selfloop transitions, 4 changer transitions 16/44 dead transitions. [2024-06-20 16:42:27,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 44 transitions, 280 flow [2024-06-20 16:42:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 16:42:27,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-20 16:42:27,482 INFO L175 Difference]: Start difference. First operand has 73 places, 32 transitions, 174 flow. Second operand 11 states and 125 transitions. [2024-06-20 16:42:27,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 44 transitions, 280 flow [2024-06-20 16:42:27,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 44 transitions, 248 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-20 16:42:27,483 INFO L231 Difference]: Finished difference. Result has 65 places, 26 transitions, 123 flow [2024-06-20 16:42:27,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=123, PETRI_PLACES=65, PETRI_TRANSITIONS=26} [2024-06-20 16:42:27,484 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-20 16:42:27,484 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 26 transitions, 123 flow [2024-06-20 16:42:27,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:27,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:27,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:42:27,484 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)] === [2024-06-20 16:42:27,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1662239886, now seen corresponding path program 11 times [2024-06-20 16:42:27,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:27,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380841004] [2024-06-20 16:42:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:28,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380841004] [2024-06-20 16:42:28,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380841004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:28,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:28,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:28,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132062701] [2024-06-20 16:42:28,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:28,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:28,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:28,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:29,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:29,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 26 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:29,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:29,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:29,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:29,218 INFO L124 PetriNetUnfolderBase]: 51/122 cut-off events. [2024-06-20 16:42:29,218 INFO L125 PetriNetUnfolderBase]: For 1350/1354 co-relation queries the response was YES. [2024-06-20 16:42:29,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 122 events. 51/122 cut-off events. For 1350/1354 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 307 event pairs, 17 based on Foata normal form. 10/132 useless extension candidates. Maximal degree in co-relation 386. Up to 60 conditions per place. [2024-06-20 16:42:29,219 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 16 selfloop transitions, 6 changer transitions 13/39 dead transitions. [2024-06-20 16:42:29,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 39 transitions, 221 flow [2024-06-20 16:42:29,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:29,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-20 16:42:29,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 16:42:29,220 INFO L175 Difference]: Start difference. First operand has 65 places, 26 transitions, 123 flow. Second operand 11 states and 124 transitions. [2024-06-20 16:42:29,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 39 transitions, 221 flow [2024-06-20 16:42:29,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 39 transitions, 201 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 16:42:29,221 INFO L231 Difference]: Finished difference. Result has 55 places, 22 transitions, 100 flow [2024-06-20 16:42:29,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=100, PETRI_PLACES=55, PETRI_TRANSITIONS=22} [2024-06-20 16:42:29,222 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-20 16:42:29,222 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 22 transitions, 100 flow [2024-06-20 16:42:29,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:29,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:29,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:29,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:42:29,222 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)] === [2024-06-20 16:42:29,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:29,223 INFO L85 PathProgramCache]: Analyzing trace with hash -310026160, now seen corresponding path program 12 times [2024-06-20 16:42:29,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:29,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818341816] [2024-06-20 16:42:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:29,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:31,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818341816] [2024-06-20 16:42:31,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818341816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:31,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:31,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:42:31,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563348413] [2024-06-20 16:42:31,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:31,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:42:31,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:31,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:42:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:42:31,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-20 16:42:31,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 22 transitions, 100 flow. Second operand has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:31,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:31,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-20 16:42:31,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:32,129 INFO L124 PetriNetUnfolderBase]: 25/68 cut-off events. [2024-06-20 16:42:32,130 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-06-20 16:42:32,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 68 events. 25/68 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 170. Up to 24 conditions per place. [2024-06-20 16:42:32,130 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2024-06-20 16:42:32,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 31 transitions, 150 flow [2024-06-20 16:42:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:42:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:42:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-20 16:42:32,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-20 16:42:32,131 INFO L175 Difference]: Start difference. First operand has 55 places, 22 transitions, 100 flow. Second operand 11 states and 116 transitions. [2024-06-20 16:42:32,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 31 transitions, 150 flow [2024-06-20 16:42:32,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 122 flow, removed 1 selfloop flow, removed 14 redundant places. [2024-06-20 16:42:32,132 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2024-06-20 16:42:32,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2024-06-20 16:42:32,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-20 16:42:32,132 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2024-06-20 16:42:32,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.25) internal successors, (111), 12 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:32,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 16:42:32,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 16:42:32,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 16:42:32,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 16:42:32,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:42:32,144 INFO L445 BasicCegarLoop]: Path program histogram: [18, 13, 12, 10, 8, 7, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:32,147 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 16:42:32,147 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 16:42:32,152 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 16:42:32,152 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 16:42:32,153 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 04:42:32 BasicIcfg [2024-06-20 16:42:32,153 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 16:42:32,153 INFO L158 Benchmark]: Toolchain (without parser) took 156799.90ms. Allocated memory was 144.7MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 111.6MB in the beginning and 467.9MB in the end (delta: -356.3MB). Peak memory consumption was 751.0MB. Max. memory is 16.1GB. [2024-06-20 16:42:32,153 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:42:32,153 INFO L158 Benchmark]: Witness Parser took 4.46ms. Allocated memory is still 144.7MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:42:32,154 INFO L158 Benchmark]: CACSL2BoogieTranslator took 533.50ms. Allocated memory is still 144.7MB. Free memory was 110.9MB in the beginning and 76.6MB in the end (delta: 34.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-06-20 16:42:32,154 INFO L158 Benchmark]: Boogie Procedure Inliner took 131.32ms. Allocated memory is still 144.7MB. Free memory was 76.6MB in the beginning and 112.8MB in the end (delta: -36.2MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2024-06-20 16:42:32,154 INFO L158 Benchmark]: Boogie Preprocessor took 96.53ms. Allocated memory is still 144.7MB. Free memory was 112.8MB in the beginning and 108.9MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 16:42:32,154 INFO L158 Benchmark]: RCFGBuilder took 648.09ms. Allocated memory is still 144.7MB. Free memory was 108.9MB in the beginning and 53.2MB in the end (delta: 55.7MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. [2024-06-20 16:42:32,154 INFO L158 Benchmark]: TraceAbstraction took 155385.48ms. Allocated memory was 144.7MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 52.3MB in the beginning and 467.9MB in the end (delta: -415.6MB). Peak memory consumption was 691.4MB. Max. memory is 16.1GB. [2024-06-20 16:42:32,155 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 144.7MB. Free memory is still 112.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 4.46ms. Allocated memory is still 144.7MB. Free memory is still 117.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 533.50ms. Allocated memory is still 144.7MB. Free memory was 110.9MB in the beginning and 76.6MB in the end (delta: 34.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 131.32ms. Allocated memory is still 144.7MB. Free memory was 76.6MB in the beginning and 112.8MB in the end (delta: -36.2MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 96.53ms. Allocated memory is still 144.7MB. Free memory was 112.8MB in the beginning and 108.9MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 648.09ms. Allocated memory is still 144.7MB. Free memory was 108.9MB in the beginning and 53.2MB in the end (delta: 55.7MB). Peak memory consumption was 56.6MB. Max. memory is 16.1GB. * TraceAbstraction took 155385.48ms. Allocated memory was 144.7MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 52.3MB in the beginning and 467.9MB in the end (delta: -415.6MB). Peak memory consumption was 691.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 826]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 827]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 155.3s, OverallIterations: 106, TraceHistogramMax: 1, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 41.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5966 SdHoareTripleChecker+Valid, 22.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5043 mSDsluCounter, 3436 SdHoareTripleChecker+Invalid, 19.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3069 mSDsCounter, 937 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38934 IncrementalHoareTripleChecker+Invalid, 39871 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 937 mSolverCounterUnsat, 367 mSDtfsCounter, 38934 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 30.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1575occurred in iteration=53, InterpolantAutomatonStates: 984, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 112.2s InterpolantComputationTime, 1732 NumberOfCodeBlocks, 1732 NumberOfCodeBlocksAsserted, 106 NumberOfCheckSat, 1626 ConstructedInterpolants, 0 QuantifiedInterpolants, 79202 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 106 InterpolantComputations, 106 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! [2024-06-20 16:42:32,208 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