./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.2024-06-19_11-23-25.files/protection/rfi010.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi010.i ./goblint.2024-06-19_11-23-25.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-eb4cb34-m [2024-06-21 17:10:44,051 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:10:44,127 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:10:44,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:10:44,134 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:10:44,163 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:10:44,164 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:10:44,164 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:10:44,165 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:10:44,169 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:10:44,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:10:44,169 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:10:44,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:10:44,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:10:44,172 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:10:44,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:10:44,172 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:10:44,173 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:10:44,173 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:10:44,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:10:44,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:10:44,174 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:10:44,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:10:44,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:10:44,175 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:10:44,175 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:10:44,175 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:10:44,175 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:10:44,176 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:10:44,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:10:44,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:10:44,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:10:44,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:10:44,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:10:44,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:10:44,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:10:44,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:10:44,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:10:44,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:10:44,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:10:44,179 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:10:44,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:10:44,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:10:44,180 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:10:44,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:10:44,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:10:44,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:10:44,465 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:10:44,466 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:10:44,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi010.i [2024-06-21 17:10:45,581 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:10:45,829 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:10:45,832 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi010.i [2024-06-21 17:10:45,849 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa3233995/2b942359d3d84f038df44c92e224c387/FLAGc1d9782b2 [2024-06-21 17:10:45,860 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa3233995/2b942359d3d84f038df44c92e224c387 [2024-06-21 17:10:45,863 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:10:45,863 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:10:45,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi010.yml/witness.yml [2024-06-21 17:10:46,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:10:46,028 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:10:46,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:10:46,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:10:46,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:10:46,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:10:45" (1/2) ... [2024-06-21 17:10:46,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6322c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:46, skipping insertion in model container [2024-06-21 17:10:46,036 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:10:45" (1/2) ... [2024-06-21 17:10:46,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57d0310a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:10:46, skipping insertion in model container [2024-06-21 17:10:46,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:10:46" (2/2) ... [2024-06-21 17:10:46,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6322c7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46, skipping insertion in model container [2024-06-21 17:10:46,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:10:46" (2/2) ... [2024-06-21 17:10:46,039 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:10:46,108 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:10:46,109 INFO L97 edCorrectnessWitness]: Location invariant before [L827-L827] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 17:10:46,109 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 17:10:46,110 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:10:46,110 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-21 17:10:46,164 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:10:46,503 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:10:46,523 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:10:46,668 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:10:46,699 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:10:46,700 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46 WrapperNode [2024-06-21 17:10:46,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:10:46,701 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:10:46,701 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:10:46,701 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:10:46,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,752 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-21 17:10:46,752 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:10:46,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:10:46,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:10:46,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:10:46,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,782 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:10:46,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,791 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,793 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,795 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,796 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:10:46,801 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:10:46,814 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:10:46,814 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:10:46,815 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (1/1) ... [2024-06-21 17:10:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:10:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:10:46,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:10:46,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:10:46,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:10:46,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:10:46,915 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:10:46,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:10:46,915 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:10:46,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:10:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:10:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:10:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:10:46,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:10:46,917 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:10:47,063 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:10:47,065 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:10:47,462 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:10:47,463 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:10:47,654 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:10:47,654 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:10:47,657 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:10:47 BoogieIcfgContainer [2024-06-21 17:10:47,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:10:47,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:10:47,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:10:47,663 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:10:47,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:10:45" (1/4) ... [2024-06-21 17:10:47,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bf77df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:10:47, skipping insertion in model container [2024-06-21 17:10:47,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:10:46" (2/4) ... [2024-06-21 17:10:47,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bf77df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:10:47, skipping insertion in model container [2024-06-21 17:10:47,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:10:46" (3/4) ... [2024-06-21 17:10:47,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bf77df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:10:47, skipping insertion in model container [2024-06-21 17:10:47,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:10:47" (4/4) ... [2024-06-21 17:10:47,671 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi010.i [2024-06-21 17:10:47,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:10:47,688 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 17:10:47,688 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:10:47,726 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:10:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 17:10:47,783 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 17:10:47,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:10:47,785 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. [2024-06-21 17:10:47,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 17:10:47,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 17:10:47,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:10:47,810 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;@1ff6f3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:10:47,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 17:10:47,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:10:47,814 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:10:47,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:10:47,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:47,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:10:47,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:47,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 358540720, now seen corresponding path program 1 times [2024-06-21 17:10:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:47,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538374915] [2024-06-21 17:10:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:47,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538374915] [2024-06-21 17:10:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538374915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:48,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:48,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:10:48,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456257194] [2024-06-21 17:10:48,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:10:48,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:10:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:10:48,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 31 [2024-06-21 17:10:48,766 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) [2024-06-21 17:10:48,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:48,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 31 [2024-06-21 17:10:48,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:48,874 INFO L124 PetriNetUnfolderBase]: 131/261 cut-off events. [2024-06-21 17:10:48,874 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-21 17:10:48,897 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. [2024-06-21 17:10:48,900 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 20 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 17:10:48,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 113 flow [2024-06-21 17:10:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:10:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:10:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-06-21 17:10:48,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2024-06-21 17:10:48,912 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 58 transitions. [2024-06-21 17:10:48,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 113 flow [2024-06-21 17:10:48,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 17:10:48,917 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 17:10:48,918 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} [2024-06-21 17:10:48,921 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 17:10:48,921 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 17:10:48,922 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) [2024-06-21 17:10:48,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:48,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:48,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:10:48,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:48,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash 960277711, now seen corresponding path program 1 times [2024-06-21 17:10:48,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:48,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576211134] [2024-06-21 17:10:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576211134] [2024-06-21 17:10:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576211134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:49,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:49,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:10:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76494038] [2024-06-21 17:10:49,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:10:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:10:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:10:49,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 17:10:49,441 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) [2024-06-21 17:10:49,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:49,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 17:10:49,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:49,539 INFO L124 PetriNetUnfolderBase]: 147/280 cut-off events. [2024-06-21 17:10:49,539 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-06-21 17:10:49,540 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. [2024-06-21 17:10:49,542 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-21 17:10:49,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 161 flow [2024-06-21 17:10:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:10:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:10:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-06-21 17:10:49,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2024-06-21 17:10:49,544 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 73 transitions. [2024-06-21 17:10:49,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 161 flow [2024-06-21 17:10:49,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:10:49,546 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 17:10:49,546 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} [2024-06-21 17:10:49,547 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 17:10:49,547 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 17:10:49,547 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) [2024-06-21 17:10:49,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:49,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:49,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:10:49,548 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)] === [2024-06-21 17:10:49,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1645613247, now seen corresponding path program 1 times [2024-06-21 17:10:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:49,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191429987] [2024-06-21 17:10:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:49,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:50,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:50,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191429987] [2024-06-21 17:10:50,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191429987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:50,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:50,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:10:50,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089697860] [2024-06-21 17:10:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:10:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:10:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:10:50,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 17:10:50,247 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) [2024-06-21 17:10:50,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:50,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 17:10:50,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:50,399 INFO L124 PetriNetUnfolderBase]: 123/246 cut-off events. [2024-06-21 17:10:50,400 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2024-06-21 17:10:50,402 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. [2024-06-21 17:10:50,403 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 23 selfloop transitions, 6 changer transitions 0/34 dead transitions. [2024-06-21 17:10:50,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 171 flow [2024-06-21 17:10:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:10:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:10:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-06-21 17:10:50,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47096774193548385 [2024-06-21 17:10:50,408 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 73 transitions. [2024-06-21 17:10:50,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 171 flow [2024-06-21 17:10:50,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 162 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 17:10:50,412 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 113 flow [2024-06-21 17:10:50,412 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} [2024-06-21 17:10:50,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 17:10:50,414 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 113 flow [2024-06-21 17:10:50,414 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) [2024-06-21 17:10:50,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:50,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:50,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:10:50,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:50,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1069977843, now seen corresponding path program 1 times [2024-06-21 17:10:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:50,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214565624] [2024-06-21 17:10:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:50,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:51,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:51,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214565624] [2024-06-21 17:10:51,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214565624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:51,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:51,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:10:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45601182] [2024-06-21 17:10:51,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:51,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:10:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:10:51,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:10:51,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 31 [2024-06-21 17:10:51,430 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) [2024-06-21 17:10:51,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:51,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 31 [2024-06-21 17:10:51,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:51,613 INFO L124 PetriNetUnfolderBase]: 141/269 cut-off events. [2024-06-21 17:10:51,613 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-06-21 17:10:51,614 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. [2024-06-21 17:10:51,616 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 31 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-21 17:10:51,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 225 flow [2024-06-21 17:10:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 17:10:51,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-21 17:10:51,617 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 113 flow. Second operand 6 states and 99 transitions. [2024-06-21 17:10:51,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 225 flow [2024-06-21 17:10:51,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 214 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:51,620 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 127 flow [2024-06-21 17:10:51,620 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} [2024-06-21 17:10:51,621 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 17:10:51,621 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 127 flow [2024-06-21 17:10:51,621 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) [2024-06-21 17:10:51,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:51,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:51,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:10:51,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:51,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:51,622 INFO L85 PathProgramCache]: Analyzing trace with hash 539897294, now seen corresponding path program 1 times [2024-06-21 17:10:51,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:51,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919169608] [2024-06-21 17:10:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:51,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:52,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919169608] [2024-06-21 17:10:52,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919169608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:52,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:52,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881207865] [2024-06-21 17:10:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:52,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:52,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:52,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 17:10:52,579 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) [2024-06-21 17:10:52,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:52,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 17:10:52,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:52,727 INFO L124 PetriNetUnfolderBase]: 117/239 cut-off events. [2024-06-21 17:10:52,728 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2024-06-21 17:10:52,728 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. [2024-06-21 17:10:52,730 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 25 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2024-06-21 17:10:52,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 215 flow [2024-06-21 17:10:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-21 17:10:52,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 17:10:52,732 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 127 flow. Second operand 6 states and 84 transitions. [2024-06-21 17:10:52,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 215 flow [2024-06-21 17:10:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 199 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:52,734 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 144 flow [2024-06-21 17:10:52,735 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} [2024-06-21 17:10:52,735 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2024-06-21 17:10:52,736 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 144 flow [2024-06-21 17:10:52,736 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) [2024-06-21 17:10:52,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:52,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:52,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:10:52,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:52,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -886588478, now seen corresponding path program 1 times [2024-06-21 17:10:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929151856] [2024-06-21 17:10:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:53,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:53,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929151856] [2024-06-21 17:10:53,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929151856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:53,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:53,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:53,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45056427] [2024-06-21 17:10:53,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:53,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:53,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:53,281 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) [2024-06-21 17:10:53,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:53,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:53,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:53,510 INFO L124 PetriNetUnfolderBase]: 143/277 cut-off events. [2024-06-21 17:10:53,510 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2024-06-21 17:10:53,512 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. [2024-06-21 17:10:53,513 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 32 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-21 17:10:53,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 258 flow [2024-06-21 17:10:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-21 17:10:53,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-21 17:10:53,516 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 144 flow. Second operand 6 states and 83 transitions. [2024-06-21 17:10:53,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 258 flow [2024-06-21 17:10:53,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 241 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:53,520 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 160 flow [2024-06-21 17:10:53,520 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} [2024-06-21 17:10:53,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-21 17:10:53,523 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 160 flow [2024-06-21 17:10:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:53,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:53,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:10:53,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:53,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash -443061248, now seen corresponding path program 2 times [2024-06-21 17:10:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:53,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757826457] [2024-06-21 17:10:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:53,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757826457] [2024-06-21 17:10:54,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757826457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:54,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:54,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:10:54,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643558688] [2024-06-21 17:10:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:54,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:10:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:10:54,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:10:54,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:54,137 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) [2024-06-21 17:10:54,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:54,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:54,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:54,278 INFO L124 PetriNetUnfolderBase]: 144/278 cut-off events. [2024-06-21 17:10:54,278 INFO L125 PetriNetUnfolderBase]: For 720/720 co-relation queries the response was YES. [2024-06-21 17:10:54,279 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. [2024-06-21 17:10:54,280 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 29 selfloop transitions, 11 changer transitions 0/44 dead transitions. [2024-06-21 17:10:54,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 274 flow [2024-06-21 17:10:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:10:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:10:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2024-06-21 17:10:54,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623655913978494 [2024-06-21 17:10:54,283 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 160 flow. Second operand 6 states and 83 transitions. [2024-06-21 17:10:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 274 flow [2024-06-21 17:10:54,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 257 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:54,286 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 186 flow [2024-06-21 17:10:54,287 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} [2024-06-21 17:10:54,287 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 17:10:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 186 flow [2024-06-21 17:10:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:10:54,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:54,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:54,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:10:54,289 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:54,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1103110033, now seen corresponding path program 1 times [2024-06-21 17:10:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:54,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792143541] [2024-06-21 17:10:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:54,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792143541] [2024-06-21 17:10:54,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792143541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:54,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:54,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299508358] [2024-06-21 17:10:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:54,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:54,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:55,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:55,013 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) [2024-06-21 17:10:55,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:55,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:55,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:55,223 INFO L124 PetriNetUnfolderBase]: 160/311 cut-off events. [2024-06-21 17:10:55,224 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2024-06-21 17:10:55,225 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. [2024-06-21 17:10:55,226 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 14 changer transitions 0/56 dead transitions. [2024-06-21 17:10:55,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 366 flow [2024-06-21 17:10:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:10:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:10:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 17:10:55,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 17:10:55,228 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 186 flow. Second operand 8 states and 107 transitions. [2024-06-21 17:10:55,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 366 flow [2024-06-21 17:10:55,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 331 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:55,231 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 248 flow [2024-06-21 17:10:55,231 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} [2024-06-21 17:10:55,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-06-21 17:10:55,232 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 248 flow [2024-06-21 17:10:55,232 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) [2024-06-21 17:10:55,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:55,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:55,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:10:55,233 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:55,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1913740113, now seen corresponding path program 2 times [2024-06-21 17:10:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:55,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230724595] [2024-06-21 17:10:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:55,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:55,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:55,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230724595] [2024-06-21 17:10:55,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230724595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:55,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:55,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:55,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607979727] [2024-06-21 17:10:55,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:55,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:56,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:56,031 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) [2024-06-21 17:10:56,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:56,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:56,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:56,228 INFO L124 PetriNetUnfolderBase]: 166/323 cut-off events. [2024-06-21 17:10:56,229 INFO L125 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2024-06-21 17:10:56,230 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. [2024-06-21 17:10:56,231 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 35 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2024-06-21 17:10:56,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 57 transitions, 404 flow [2024-06-21 17:10:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 17:10:56,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-21 17:10:56,233 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 248 flow. Second operand 7 states and 95 transitions. [2024-06-21 17:10:56,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 57 transitions, 404 flow [2024-06-21 17:10:56,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 57 transitions, 377 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:10:56,236 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 293 flow [2024-06-21 17:10:56,236 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} [2024-06-21 17:10:56,237 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-21 17:10:56,237 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 293 flow [2024-06-21 17:10:56,237 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) [2024-06-21 17:10:56,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:56,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:10:56,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:56,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1706819763, now seen corresponding path program 3 times [2024-06-21 17:10:56,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:56,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580220442] [2024-06-21 17:10:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:56,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:56,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580220442] [2024-06-21 17:10:56,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580220442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:56,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:56,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:56,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912630609] [2024-06-21 17:10:56,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:56,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:56,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:57,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:57,053 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) [2024-06-21 17:10:57,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:57,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:57,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:57,229 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-06-21 17:10:57,229 INFO L125 PetriNetUnfolderBase]: For 1627/1627 co-relation queries the response was YES. [2024-06-21 17:10:57,230 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. [2024-06-21 17:10:57,234 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 32 selfloop transitions, 26 changer transitions 0/62 dead transitions. [2024-06-21 17:10:57,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 499 flow [2024-06-21 17:10:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-21 17:10:57,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-21 17:10:57,236 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 293 flow. Second operand 7 states and 96 transitions. [2024-06-21 17:10:57,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 499 flow [2024-06-21 17:10:57,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 441 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:10:57,241 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 364 flow [2024-06-21 17:10:57,242 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} [2024-06-21 17:10:57,243 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2024-06-21 17:10:57,245 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 364 flow [2024-06-21 17:10:57,245 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) [2024-06-21 17:10:57,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:57,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:10:57,247 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:57,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1707086673, now seen corresponding path program 4 times [2024-06-21 17:10:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:57,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894392785] [2024-06-21 17:10:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894392785] [2024-06-21 17:10:58,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894392785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:58,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:58,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:10:58,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904193594] [2024-06-21 17:10:58,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:58,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:10:58,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:10:58,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:10:58,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:58,087 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) [2024-06-21 17:10:58,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:58,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:58,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:58,278 INFO L124 PetriNetUnfolderBase]: 170/328 cut-off events. [2024-06-21 17:10:58,278 INFO L125 PetriNetUnfolderBase]: For 1669/1669 co-relation queries the response was YES. [2024-06-21 17:10:58,279 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. [2024-06-21 17:10:58,281 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 41 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2024-06-21 17:10:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 527 flow [2024-06-21 17:10:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:10:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:10:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 17:10:58,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-21 17:10:58,284 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 364 flow. Second operand 7 states and 95 transitions. [2024-06-21 17:10:58,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 527 flow [2024-06-21 17:10:58,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 495 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:10:58,288 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 383 flow [2024-06-21 17:10:58,289 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} [2024-06-21 17:10:58,290 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-21 17:10:58,290 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 383 flow [2024-06-21 17:10:58,290 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) [2024-06-21 17:10:58,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:58,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:58,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:10:58,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:58,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash -849719251, now seen corresponding path program 1 times [2024-06-21 17:10:58,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:58,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115399795] [2024-06-21 17:10:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:58,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:10:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:10:59,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:10:59,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115399795] [2024-06-21 17:10:59,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115399795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:10:59,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:10:59,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:10:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395755112] [2024-06-21 17:10:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:10:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:10:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:10:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:10:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:10:59,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:10:59,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 383 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) [2024-06-21 17:10:59,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:10:59,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:10:59,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:10:59,543 INFO L124 PetriNetUnfolderBase]: 168/327 cut-off events. [2024-06-21 17:10:59,543 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2024-06-21 17:10:59,544 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 1326 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. [2024-06-21 17:10:59,546 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2024-06-21 17:10:59,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 533 flow [2024-06-21 17:10:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:10:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:10:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 17:10:59,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-21 17:10:59,548 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 383 flow. Second operand 8 states and 101 transitions. [2024-06-21 17:10:59,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 533 flow [2024-06-21 17:10:59,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 495 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:10:59,552 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 388 flow [2024-06-21 17:10:59,553 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=388, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-06-21 17:10:59,554 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-21 17:10:59,555 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 388 flow [2024-06-21 17:10:59,555 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) [2024-06-21 17:10:59,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:10:59,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:10:59,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:10:59,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:10:59,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:10:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash 803414817, now seen corresponding path program 1 times [2024-06-21 17:10:59,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:10:59,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456897179] [2024-06-21 17:10:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:10:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:10:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:00,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456897179] [2024-06-21 17:11:00,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456897179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:00,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:00,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:11:00,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621511020] [2024-06-21 17:11:00,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:00,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:11:00,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:11:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:11:00,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:00,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 388 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) [2024-06-21 17:11:00,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:00,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:00,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:00,566 INFO L124 PetriNetUnfolderBase]: 166/324 cut-off events. [2024-06-21 17:11:00,566 INFO L125 PetriNetUnfolderBase]: For 1890/1890 co-relation queries the response was YES. [2024-06-21 17:11:00,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 324 events. 166/324 cut-off events. For 1890/1890 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1313 event pairs, 36 based on Foata normal form. 1/324 useless extension candidates. Maximal degree in co-relation 1435. Up to 269 conditions per place. [2024-06-21 17:11:00,569 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-21 17:11:00,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 574 flow [2024-06-21 17:11:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:11:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:11:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-21 17:11:00,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423963133640553 [2024-06-21 17:11:00,571 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 388 flow. Second operand 7 states and 96 transitions. [2024-06-21 17:11:00,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 574 flow [2024-06-21 17:11:00,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 528 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:00,576 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 395 flow [2024-06-21 17:11:00,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-21 17:11:00,577 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-21 17:11:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 395 flow [2024-06-21 17:11:00,578 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) [2024-06-21 17:11:00,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:00,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:00,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:11:00,578 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:00,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:00,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1607979711, now seen corresponding path program 1 times [2024-06-21 17:11:00,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:00,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676664069] [2024-06-21 17:11:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676664069] [2024-06-21 17:11:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676664069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865875111] [2024-06-21 17:11:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:01,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:01,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 395 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) [2024-06-21 17:11:01,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:01,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:01,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:01,727 INFO L124 PetriNetUnfolderBase]: 178/344 cut-off events. [2024-06-21 17:11:01,727 INFO L125 PetriNetUnfolderBase]: For 2502/2502 co-relation queries the response was YES. [2024-06-21 17:11:01,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1588 conditions, 344 events. 178/344 cut-off events. For 2502/2502 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1418 event pairs, 35 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 1556. Up to 264 conditions per place. [2024-06-21 17:11:01,730 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 48 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-06-21 17:11:01,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 601 flow [2024-06-21 17:11:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 17:11:01,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 17:11:01,732 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 395 flow. Second operand 8 states and 108 transitions. [2024-06-21 17:11:01,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 601 flow [2024-06-21 17:11:01,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 564 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:01,737 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 441 flow [2024-06-21 17:11:01,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=441, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2024-06-21 17:11:01,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-21 17:11:01,738 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 441 flow [2024-06-21 17:11:01,739 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) [2024-06-21 17:11:01,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:01,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:01,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:11:01,739 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:01,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1162588547, now seen corresponding path program 2 times [2024-06-21 17:11:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:01,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81519261] [2024-06-21 17:11:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:02,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81519261] [2024-06-21 17:11:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81519261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:02,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:02,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:02,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41920406] [2024-06-21 17:11:02,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:02,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:02,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:02,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 441 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) [2024-06-21 17:11:02,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:02,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:02,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:02,907 INFO L124 PetriNetUnfolderBase]: 184/352 cut-off events. [2024-06-21 17:11:02,908 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-21 17:11:02,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730 conditions, 352 events. 184/352 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1440 event pairs, 37 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1697. Up to 281 conditions per place. [2024-06-21 17:11:02,911 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2024-06-21 17:11:02,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 657 flow [2024-06-21 17:11:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 17:11:02,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 17:11:02,912 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 441 flow. Second operand 8 states and 107 transitions. [2024-06-21 17:11:02,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 657 flow [2024-06-21 17:11:02,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 598 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:02,921 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 468 flow [2024-06-21 17:11:02,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-06-21 17:11:02,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 17:11:02,922 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 468 flow [2024-06-21 17:11:02,923 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) [2024-06-21 17:11:02,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:02,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:11:02,924 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:02,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 976319921, now seen corresponding path program 3 times [2024-06-21 17:11:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:02,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308238449] [2024-06-21 17:11:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:03,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:03,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308238449] [2024-06-21 17:11:03,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308238449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:03,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:03,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:03,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460250656] [2024-06-21 17:11:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:03,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:03,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:03,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 468 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) [2024-06-21 17:11:03,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:03,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:03,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:04,013 INFO L124 PetriNetUnfolderBase]: 187/359 cut-off events. [2024-06-21 17:11:04,013 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2024-06-21 17:11:04,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1796 conditions, 359 events. 187/359 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1486 event pairs, 37 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1762. Up to 248 conditions per place. [2024-06-21 17:11:04,017 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 42 selfloop transitions, 35 changer transitions 0/81 dead transitions. [2024-06-21 17:11:04,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 740 flow [2024-06-21 17:11:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-06-21 17:11:04,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2024-06-21 17:11:04,019 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 468 flow. Second operand 8 states and 109 transitions. [2024-06-21 17:11:04,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 740 flow [2024-06-21 17:11:04,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 676 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:04,025 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 568 flow [2024-06-21 17:11:04,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=568, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-21 17:11:04,026 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-21 17:11:04,026 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 568 flow [2024-06-21 17:11:04,029 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) [2024-06-21 17:11:04,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:04,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:04,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:11:04,031 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1371507681, now seen corresponding path program 4 times [2024-06-21 17:11:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974429398] [2024-06-21 17:11:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:04,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:04,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974429398] [2024-06-21 17:11:04,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974429398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:04,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:04,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230338933] [2024-06-21 17:11:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:04,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:04,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 568 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) [2024-06-21 17:11:04,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:04,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:04,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:05,200 INFO L124 PetriNetUnfolderBase]: 188/365 cut-off events. [2024-06-21 17:11:05,200 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-06-21 17:11:05,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 365 events. 188/365 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1518 event pairs, 38 based on Foata normal form. 2/366 useless extension candidates. Maximal degree in co-relation 1883. Up to 312 conditions per place. [2024-06-21 17:11:05,204 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 63 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2024-06-21 17:11:05,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 766 flow [2024-06-21 17:11:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 17:11:05,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-21 17:11:05,205 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 568 flow. Second operand 8 states and 103 transitions. [2024-06-21 17:11:05,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 766 flow [2024-06-21 17:11:05,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 718 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:05,213 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 583 flow [2024-06-21 17:11:05,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2024-06-21 17:11:05,213 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2024-06-21 17:11:05,214 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 583 flow [2024-06-21 17:11:05,214 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) [2024-06-21 17:11:05,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:05,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:05,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:11:05,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:05,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash -571492193, now seen corresponding path program 1 times [2024-06-21 17:11:05,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:05,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047840958] [2024-06-21 17:11:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:05,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:06,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:06,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047840958] [2024-06-21 17:11:06,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047840958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:06,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:06,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735180999] [2024-06-21 17:11:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:06,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:06,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 583 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) [2024-06-21 17:11:06,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:06,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:06,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:06,748 INFO L124 PetriNetUnfolderBase]: 185/360 cut-off events. [2024-06-21 17:11:06,748 INFO L125 PetriNetUnfolderBase]: For 3962/3962 co-relation queries the response was YES. [2024-06-21 17:11:06,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 360 events. 185/360 cut-off events. For 3962/3962 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1476 event pairs, 37 based on Foata normal form. 2/361 useless extension candidates. Maximal degree in co-relation 1879. Up to 309 conditions per place. [2024-06-21 17:11:06,752 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 66 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-21 17:11:06,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 83 transitions, 765 flow [2024-06-21 17:11:06,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 17:11:06,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 17:11:06,753 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 583 flow. Second operand 9 states and 111 transitions. [2024-06-21 17:11:06,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 83 transitions, 765 flow [2024-06-21 17:11:06,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 722 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:06,760 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 570 flow [2024-06-21 17:11:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=570, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2024-06-21 17:11:06,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-06-21 17:11:06,761 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 570 flow [2024-06-21 17:11:06,761 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) [2024-06-21 17:11:06,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:06,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:11:06,762 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash -319541426, now seen corresponding path program 1 times [2024-06-21 17:11:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898500151] [2024-06-21 17:11:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:08,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898500151] [2024-06-21 17:11:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898500151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:08,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:08,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:08,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455994080] [2024-06-21 17:11:08,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:08,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:08,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:08,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:08,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:08,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:08,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 570 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) [2024-06-21 17:11:08,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:08,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:08,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:08,401 INFO L124 PetriNetUnfolderBase]: 188/367 cut-off events. [2024-06-21 17:11:08,402 INFO L125 PetriNetUnfolderBase]: For 4074/4074 co-relation queries the response was YES. [2024-06-21 17:11:08,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1959 conditions, 367 events. 188/367 cut-off events. For 4074/4074 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1527 event pairs, 32 based on Foata normal form. 1/367 useless extension candidates. Maximal degree in co-relation 1919. Up to 303 conditions per place. [2024-06-21 17:11:08,405 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 70 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-21 17:11:08,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 88 transitions, 798 flow [2024-06-21 17:11:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 17:11:08,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 17:11:08,407 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 570 flow. Second operand 8 states and 107 transitions. [2024-06-21 17:11:08,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 88 transitions, 798 flow [2024-06-21 17:11:08,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 766 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:08,414 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 599 flow [2024-06-21 17:11:08,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=599, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-06-21 17:11:08,415 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-21 17:11:08,415 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 599 flow [2024-06-21 17:11:08,415 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) [2024-06-21 17:11:08,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:08,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:08,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:11:08,416 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:08,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash -171724436, now seen corresponding path program 2 times [2024-06-21 17:11:08,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:08,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255233903] [2024-06-21 17:11:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:09,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:09,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255233903] [2024-06-21 17:11:09,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255233903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:09,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:09,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:09,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481148759] [2024-06-21 17:11:09,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:09,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:09,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:09,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:09,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 599 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) [2024-06-21 17:11:09,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:09,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:09,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:09,926 INFO L124 PetriNetUnfolderBase]: 191/372 cut-off events. [2024-06-21 17:11:09,926 INFO L125 PetriNetUnfolderBase]: For 4435/4435 co-relation queries the response was YES. [2024-06-21 17:11:09,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 372 events. 191/372 cut-off events. For 4435/4435 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1547 event pairs, 32 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 1994. Up to 297 conditions per place. [2024-06-21 17:11:09,929 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 64 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-21 17:11:09,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 841 flow [2024-06-21 17:11:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 17:11:09,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 17:11:09,931 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 599 flow. Second operand 8 states and 106 transitions. [2024-06-21 17:11:09,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 841 flow [2024-06-21 17:11:09,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 796 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:09,940 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 632 flow [2024-06-21 17:11:09,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=632, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2024-06-21 17:11:09,941 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2024-06-21 17:11:09,941 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 632 flow [2024-06-21 17:11:09,941 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) [2024-06-21 17:11:09,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:09,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:11:09,942 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:09,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 423730924, now seen corresponding path program 3 times [2024-06-21 17:11:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:09,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284869892] [2024-06-21 17:11:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:09,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:11,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:11,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284869892] [2024-06-21 17:11:11,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284869892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:11,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:11,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640176124] [2024-06-21 17:11:11,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:11,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:11,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:11,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 632 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) [2024-06-21 17:11:11,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:11,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:11,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:11,468 INFO L124 PetriNetUnfolderBase]: 194/377 cut-off events. [2024-06-21 17:11:11,469 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-06-21 17:11:11,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2121 conditions, 377 events. 194/377 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1599 event pairs, 35 based on Foata normal form. 1/375 useless extension candidates. Maximal degree in co-relation 2079. Up to 274 conditions per place. [2024-06-21 17:11:11,472 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 30 changer transitions 0/91 dead transitions. [2024-06-21 17:11:11,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 950 flow [2024-06-21 17:11:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 17:11:11,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 17:11:11,477 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 632 flow. Second operand 8 states and 107 transitions. [2024-06-21 17:11:11,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 950 flow [2024-06-21 17:11:11,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 890 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:11,487 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 705 flow [2024-06-21 17:11:11,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=705, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-06-21 17:11:11,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-21 17:11:11,487 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 705 flow [2024-06-21 17:11:11,488 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) [2024-06-21 17:11:11,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:11,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:11,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:11:11,488 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:11,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash 167230414, now seen corresponding path program 4 times [2024-06-21 17:11:11,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:11,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109550222] [2024-06-21 17:11:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:11,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:11,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109550222] [2024-06-21 17:11:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109550222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:12,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:12,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:12,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634369978] [2024-06-21 17:11:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:12,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:12,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:12,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 705 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) [2024-06-21 17:11:12,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:12,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:12,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:12,857 INFO L124 PetriNetUnfolderBase]: 192/374 cut-off events. [2024-06-21 17:11:12,857 INFO L125 PetriNetUnfolderBase]: For 5296/5296 co-relation queries the response was YES. [2024-06-21 17:11:12,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 374 events. 192/374 cut-off events. For 5296/5296 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1579 event pairs, 35 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 2082. Up to 298 conditions per place. [2024-06-21 17:11:12,861 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 67 selfloop transitions, 20 changer transitions 0/91 dead transitions. [2024-06-21 17:11:12,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 91 transitions, 939 flow [2024-06-21 17:11:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:12,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 17:11:12,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 17:11:12,862 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 705 flow. Second operand 8 states and 106 transitions. [2024-06-21 17:11:12,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 91 transitions, 939 flow [2024-06-21 17:11:12,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 872 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:12,873 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 683 flow [2024-06-21 17:11:12,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=683, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2024-06-21 17:11:12,874 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2024-06-21 17:11:12,874 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 683 flow [2024-06-21 17:11:12,874 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) [2024-06-21 17:11:12,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:12,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:12,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:11:12,875 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:12,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:12,875 INFO L85 PathProgramCache]: Analyzing trace with hash -545923060, now seen corresponding path program 1 times [2024-06-21 17:11:12,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:12,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929608457] [2024-06-21 17:11:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:12,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:13,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:13,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929608457] [2024-06-21 17:11:13,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929608457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:13,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:13,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:13,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109485526] [2024-06-21 17:11:13,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:13,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:13,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:13,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:13,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 683 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) [2024-06-21 17:11:13,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:13,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:13,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:13,941 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2024-06-21 17:11:13,942 INFO L125 PetriNetUnfolderBase]: For 5917/5917 co-relation queries the response was YES. [2024-06-21 17:11:13,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 387 events. 200/387 cut-off events. For 5917/5917 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1634 event pairs, 35 based on Foata normal form. 1/385 useless extension candidates. Maximal degree in co-relation 2208. Up to 246 conditions per place. [2024-06-21 17:11:13,946 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 50 selfloop transitions, 42 changer transitions 0/96 dead transitions. [2024-06-21 17:11:13,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 96 transitions, 1031 flow [2024-06-21 17:11:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 17:11:13,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 17:11:13,949 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 683 flow. Second operand 8 states and 112 transitions. [2024-06-21 17:11:13,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 96 transitions, 1031 flow [2024-06-21 17:11:13,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 948 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:11:13,964 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 802 flow [2024-06-21 17:11:13,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=802, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-06-21 17:11:13,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-21 17:11:13,965 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 802 flow [2024-06-21 17:11:13,965 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) [2024-06-21 17:11:13,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:13,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:13,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:11:13,966 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:13,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:13,967 INFO L85 PathProgramCache]: Analyzing trace with hash 167238350, now seen corresponding path program 2 times [2024-06-21 17:11:13,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:13,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099625035] [2024-06-21 17:11:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:15,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:15,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099625035] [2024-06-21 17:11:15,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099625035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:15,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:15,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:15,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526571548] [2024-06-21 17:11:15,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:15,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:15,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:15,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:15,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 802 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) [2024-06-21 17:11:15,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:15,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:15,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:15,579 INFO L124 PetriNetUnfolderBase]: 196/378 cut-off events. [2024-06-21 17:11:15,579 INFO L125 PetriNetUnfolderBase]: For 6573/6573 co-relation queries the response was YES. [2024-06-21 17:11:15,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 378 events. 196/378 cut-off events. For 6573/6573 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1600 event pairs, 39 based on Foata normal form. 2/376 useless extension candidates. Maximal degree in co-relation 2216. Up to 281 conditions per place. [2024-06-21 17:11:15,583 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 17:11:15,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 97 transitions, 1058 flow [2024-06-21 17:11:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 17:11:15,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 17:11:15,584 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 802 flow. Second operand 9 states and 120 transitions. [2024-06-21 17:11:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 97 transitions, 1058 flow [2024-06-21 17:11:15,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 97 transitions, 986 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:11:15,599 INFO L231 Difference]: Finished difference. Result has 99 places, 86 transitions, 788 flow [2024-06-21 17:11:15,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=788, PETRI_PLACES=99, PETRI_TRANSITIONS=86} [2024-06-21 17:11:15,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 17:11:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 86 transitions, 788 flow [2024-06-21 17:11:15,601 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) [2024-06-21 17:11:15,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:15,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:15,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:11:15,602 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:15,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash -115465122, now seen corresponding path program 1 times [2024-06-21 17:11:15,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:15,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881438469] [2024-06-21 17:11:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:16,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881438469] [2024-06-21 17:11:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881438469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:16,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:16,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144642404] [2024-06-21 17:11:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:16,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:16,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 86 transitions, 788 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) [2024-06-21 17:11:16,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:16,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:16,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:16,601 INFO L124 PetriNetUnfolderBase]: 209/410 cut-off events. [2024-06-21 17:11:16,601 INFO L125 PetriNetUnfolderBase]: For 6738/6738 co-relation queries the response was YES. [2024-06-21 17:11:16,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2392 conditions, 410 events. 209/410 cut-off events. For 6738/6738 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1795 event pairs, 32 based on Foata normal form. 2/411 useless extension candidates. Maximal degree in co-relation 2344. Up to 329 conditions per place. [2024-06-21 17:11:16,605 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 89 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-21 17:11:16,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 1076 flow [2024-06-21 17:11:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 17:11:16,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 17:11:16,607 INFO L175 Difference]: Start difference. First operand has 99 places, 86 transitions, 788 flow. Second operand 9 states and 120 transitions. [2024-06-21 17:11:16,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 1076 flow [2024-06-21 17:11:16,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 955 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 17:11:16,620 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 748 flow [2024-06-21 17:11:16,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=748, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2024-06-21 17:11:16,621 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 17:11:16,621 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 748 flow [2024-06-21 17:11:16,621 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) [2024-06-21 17:11:16,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:16,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:16,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:11:16,622 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:16,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1125540898, now seen corresponding path program 2 times [2024-06-21 17:11:16,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:16,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433752453] [2024-06-21 17:11:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:16,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:17,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:17,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433752453] [2024-06-21 17:11:17,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433752453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:17,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:17,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377603655] [2024-06-21 17:11:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:17,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:17,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:17,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:17,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:17,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:17,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 748 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) [2024-06-21 17:11:17,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:17,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:17,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:17,665 INFO L124 PetriNetUnfolderBase]: 213/418 cut-off events. [2024-06-21 17:11:17,665 INFO L125 PetriNetUnfolderBase]: For 6375/6375 co-relation queries the response was YES. [2024-06-21 17:11:17,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 418 events. 213/418 cut-off events. For 6375/6375 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1847 event pairs, 13 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 2281. Up to 311 conditions per place. [2024-06-21 17:11:17,669 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 86 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-21 17:11:17,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 106 transitions, 1002 flow [2024-06-21 17:11:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 17:11:17,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 17:11:17,671 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 748 flow. Second operand 8 states and 106 transitions. [2024-06-21 17:11:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 106 transitions, 1002 flow [2024-06-21 17:11:17,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 106 transitions, 968 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:17,683 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 766 flow [2024-06-21 17:11:17,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=766, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2024-06-21 17:11:17,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 17:11:17,684 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 766 flow [2024-06-21 17:11:17,684 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) [2024-06-21 17:11:17,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:17,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:17,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:11:17,685 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:17,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:17,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1272353170, now seen corresponding path program 3 times [2024-06-21 17:11:17,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:17,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977580194] [2024-06-21 17:11:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:18,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:18,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977580194] [2024-06-21 17:11:18,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977580194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:18,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:18,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184723542] [2024-06-21 17:11:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:18,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:18,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:18,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:18,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 766 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) [2024-06-21 17:11:18,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:18,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:18,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:18,769 INFO L124 PetriNetUnfolderBase]: 217/426 cut-off events. [2024-06-21 17:11:18,770 INFO L125 PetriNetUnfolderBase]: For 6927/6927 co-relation queries the response was YES. [2024-06-21 17:11:18,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 426 events. 217/426 cut-off events. For 6927/6927 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1893 event pairs, 35 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 2351. Up to 352 conditions per place. [2024-06-21 17:11:18,774 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 87 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2024-06-21 17:11:18,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 1020 flow [2024-06-21 17:11:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 17:11:18,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 17:11:18,776 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 766 flow. Second operand 8 states and 107 transitions. [2024-06-21 17:11:18,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 1020 flow [2024-06-21 17:11:18,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 978 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:18,788 INFO L231 Difference]: Finished difference. Result has 106 places, 93 transitions, 774 flow [2024-06-21 17:11:18,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=774, PETRI_PLACES=106, PETRI_TRANSITIONS=93} [2024-06-21 17:11:18,789 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-21 17:11:18,789 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 93 transitions, 774 flow [2024-06-21 17:11:18,789 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) [2024-06-21 17:11:18,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:18,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:11:18,790 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:18,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:18,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1315848864, now seen corresponding path program 1 times [2024-06-21 17:11:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49385973] [2024-06-21 17:11:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:19,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:19,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49385973] [2024-06-21 17:11:19,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49385973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:19,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:19,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666251610] [2024-06-21 17:11:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:19,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:19,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:19,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 93 transitions, 774 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) [2024-06-21 17:11:19,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:19,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:19,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:20,075 INFO L124 PetriNetUnfolderBase]: 223/440 cut-off events. [2024-06-21 17:11:20,076 INFO L125 PetriNetUnfolderBase]: For 7203/7203 co-relation queries the response was YES. [2024-06-21 17:11:20,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 440 events. 223/440 cut-off events. For 7203/7203 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1985 event pairs, 33 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 2417. Up to 359 conditions per place. [2024-06-21 17:11:20,080 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 87 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-21 17:11:20,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 109 transitions, 1062 flow [2024-06-21 17:11:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 17:11:20,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 17:11:20,081 INFO L175 Difference]: Start difference. First operand has 106 places, 93 transitions, 774 flow. Second operand 9 states and 119 transitions. [2024-06-21 17:11:20,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 109 transitions, 1062 flow [2024-06-21 17:11:20,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 1024 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:20,093 INFO L231 Difference]: Finished difference. Result has 109 places, 95 transitions, 815 flow [2024-06-21 17:11:20,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=815, PETRI_PLACES=109, PETRI_TRANSITIONS=95} [2024-06-21 17:11:20,094 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 17:11:20,094 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 95 transitions, 815 flow [2024-06-21 17:11:20,094 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) [2024-06-21 17:11:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:20,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:11:20,095 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:20,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1034923520, now seen corresponding path program 4 times [2024-06-21 17:11:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:20,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073104535] [2024-06-21 17:11:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:20,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073104535] [2024-06-21 17:11:20,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073104535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:20,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:20,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:20,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792773937] [2024-06-21 17:11:20,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:20,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:20,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:20,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:20,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:20,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:20,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 95 transitions, 815 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) [2024-06-21 17:11:20,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:20,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:20,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:21,040 INFO L124 PetriNetUnfolderBase]: 227/448 cut-off events. [2024-06-21 17:11:21,040 INFO L125 PetriNetUnfolderBase]: For 7795/7795 co-relation queries the response was YES. [2024-06-21 17:11:21,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 448 events. 227/448 cut-off events. For 7795/7795 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2025 event pairs, 36 based on Foata normal form. 2/449 useless extension candidates. Maximal degree in co-relation 2490. Up to 375 conditions per place. [2024-06-21 17:11:21,045 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 90 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-21 17:11:21,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 110 transitions, 1115 flow [2024-06-21 17:11:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 17:11:21,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:21,047 INFO L175 Difference]: Start difference. First operand has 109 places, 95 transitions, 815 flow. Second operand 8 states and 104 transitions. [2024-06-21 17:11:21,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 110 transitions, 1115 flow [2024-06-21 17:11:21,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 110 transitions, 1054 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:21,062 INFO L231 Difference]: Finished difference. Result has 111 places, 99 transitions, 858 flow [2024-06-21 17:11:21,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=111, PETRI_TRANSITIONS=99} [2024-06-21 17:11:21,063 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-21 17:11:21,063 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 99 transitions, 858 flow [2024-06-21 17:11:21,063 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) [2024-06-21 17:11:21,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:21,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:11:21,064 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:21,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1028482960, now seen corresponding path program 2 times [2024-06-21 17:11:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:21,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600160182] [2024-06-21 17:11:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:21,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:21,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600160182] [2024-06-21 17:11:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600160182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:21,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:21,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:21,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250211122] [2024-06-21 17:11:21,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:21,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:21,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:21,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:21,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:21,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 99 transitions, 858 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) [2024-06-21 17:11:21,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:21,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:21,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:22,209 INFO L124 PetriNetUnfolderBase]: 243/476 cut-off events. [2024-06-21 17:11:22,209 INFO L125 PetriNetUnfolderBase]: For 9378/9378 co-relation queries the response was YES. [2024-06-21 17:11:22,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2803 conditions, 476 events. 243/476 cut-off events. For 9378/9378 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2177 event pairs, 37 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 2748. Up to 359 conditions per place. [2024-06-21 17:11:22,215 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 83 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-21 17:11:22,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 1260 flow [2024-06-21 17:11:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 17:11:22,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-21 17:11:22,217 INFO L175 Difference]: Start difference. First operand has 111 places, 99 transitions, 858 flow. Second operand 9 states and 121 transitions. [2024-06-21 17:11:22,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 1260 flow [2024-06-21 17:11:22,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 117 transitions, 1203 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:22,237 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 958 flow [2024-06-21 17:11:22,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=958, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2024-06-21 17:11:22,238 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-21 17:11:22,238 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 958 flow [2024-06-21 17:11:22,239 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) [2024-06-21 17:11:22,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:22,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:22,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:11:22,240 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:22,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:22,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1028489470, now seen corresponding path program 3 times [2024-06-21 17:11:22,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:22,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983872012] [2024-06-21 17:11:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:22,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:23,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:23,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983872012] [2024-06-21 17:11:23,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983872012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:23,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:23,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:23,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381054127] [2024-06-21 17:11:23,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:23,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:23,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:23,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:23,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:23,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:23,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 958 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) [2024-06-21 17:11:23,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:23,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:23,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:23,571 INFO L124 PetriNetUnfolderBase]: 241/473 cut-off events. [2024-06-21 17:11:23,572 INFO L125 PetriNetUnfolderBase]: For 9210/9210 co-relation queries the response was YES. [2024-06-21 17:11:23,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 473 events. 241/473 cut-off events. For 9210/9210 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2155 event pairs, 37 based on Foata normal form. 1/473 useless extension candidates. Maximal degree in co-relation 2746. Up to 358 conditions per place. [2024-06-21 17:11:23,576 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 32 changer transitions 0/118 dead transitions. [2024-06-21 17:11:23,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 118 transitions, 1310 flow [2024-06-21 17:11:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 17:11:23,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 17:11:23,578 INFO L175 Difference]: Start difference. First operand has 115 places, 104 transitions, 958 flow. Second operand 9 states and 122 transitions. [2024-06-21 17:11:23,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 118 transitions, 1310 flow [2024-06-21 17:11:23,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 118 transitions, 1238 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:23,597 INFO L231 Difference]: Finished difference. Result has 119 places, 106 transitions, 995 flow [2024-06-21 17:11:23,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2024-06-21 17:11:23,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-21 17:11:23,597 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 995 flow [2024-06-21 17:11:23,598 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) [2024-06-21 17:11:23,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:23,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:11:23,598 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:23,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash -835073506, now seen corresponding path program 1 times [2024-06-21 17:11:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:23,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268813049] [2024-06-21 17:11:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:24,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268813049] [2024-06-21 17:11:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268813049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:24,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:24,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220699440] [2024-06-21 17:11:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:24,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:24,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:24,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:24,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 995 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) [2024-06-21 17:11:24,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:24,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:24,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:24,815 INFO L124 PetriNetUnfolderBase]: 261/517 cut-off events. [2024-06-21 17:11:24,815 INFO L125 PetriNetUnfolderBase]: For 13920/13920 co-relation queries the response was YES. [2024-06-21 17:11:24,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 517 events. 261/517 cut-off events. For 13920/13920 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2427 event pairs, 41 based on Foata normal form. 12/528 useless extension candidates. Maximal degree in co-relation 2991. Up to 374 conditions per place. [2024-06-21 17:11:24,819 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 89 selfloop transitions, 24 changer transitions 6/123 dead transitions. [2024-06-21 17:11:24,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 123 transitions, 1343 flow [2024-06-21 17:11:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 17:11:24,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-21 17:11:24,820 INFO L175 Difference]: Start difference. First operand has 119 places, 106 transitions, 995 flow. Second operand 9 states and 123 transitions. [2024-06-21 17:11:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 123 transitions, 1343 flow [2024-06-21 17:11:24,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 1269 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:24,842 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 974 flow [2024-06-21 17:11:24,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=974, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2024-06-21 17:11:24,843 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 17:11:24,843 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 974 flow [2024-06-21 17:11:24,843 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) [2024-06-21 17:11:24,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:24,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:11:24,843 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:24,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash 887993790, now seen corresponding path program 5 times [2024-06-21 17:11:24,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:24,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234274353] [2024-06-21 17:11:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:24,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:25,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:25,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234274353] [2024-06-21 17:11:25,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234274353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:25,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:25,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:11:25,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023406064] [2024-06-21 17:11:25,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:25,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:11:25,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:25,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:11:25,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:11:25,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:25,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 974 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) [2024-06-21 17:11:25,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:25,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:25,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:25,903 INFO L124 PetriNetUnfolderBase]: 246/490 cut-off events. [2024-06-21 17:11:25,903 INFO L125 PetriNetUnfolderBase]: For 10037/10037 co-relation queries the response was YES. [2024-06-21 17:11:25,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 490 events. 246/490 cut-off events. For 10037/10037 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2299 event pairs, 43 based on Foata normal form. 2/489 useless extension candidates. Maximal degree in co-relation 2802. Up to 410 conditions per place. [2024-06-21 17:11:25,906 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 92 selfloop transitions, 20 changer transitions 0/116 dead transitions. [2024-06-21 17:11:25,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 116 transitions, 1255 flow [2024-06-21 17:11:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:11:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:11:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 17:11:25,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:25,907 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 974 flow. Second operand 8 states and 104 transitions. [2024-06-21 17:11:25,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 116 transitions, 1255 flow [2024-06-21 17:11:25,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 116 transitions, 1197 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:25,923 INFO L231 Difference]: Finished difference. Result has 124 places, 107 transitions, 998 flow [2024-06-21 17:11:25,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=998, PETRI_PLACES=124, PETRI_TRANSITIONS=107} [2024-06-21 17:11:25,924 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-21 17:11:25,924 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 107 transitions, 998 flow [2024-06-21 17:11:25,924 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) [2024-06-21 17:11:25,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:25,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:25,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:11:25,925 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:25,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:25,925 INFO L85 PathProgramCache]: Analyzing trace with hash 256015568, now seen corresponding path program 4 times [2024-06-21 17:11:25,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:25,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256423775] [2024-06-21 17:11:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:26,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256423775] [2024-06-21 17:11:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256423775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:26,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:26,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898831480] [2024-06-21 17:11:26,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:26,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:26,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 107 transitions, 998 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) [2024-06-21 17:11:26,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:26,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:26,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:27,108 INFO L124 PetriNetUnfolderBase]: 259/513 cut-off events. [2024-06-21 17:11:27,108 INFO L125 PetriNetUnfolderBase]: For 11439/11439 co-relation queries the response was YES. [2024-06-21 17:11:27,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 513 events. 259/513 cut-off events. For 11439/11439 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2426 event pairs, 42 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 3044. Up to 354 conditions per place. [2024-06-21 17:11:27,111 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 78 selfloop transitions, 46 changer transitions 0/128 dead transitions. [2024-06-21 17:11:27,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 128 transitions, 1621 flow [2024-06-21 17:11:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 17:11:27,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:11:27,112 INFO L175 Difference]: Start difference. First operand has 124 places, 107 transitions, 998 flow. Second operand 9 states and 124 transitions. [2024-06-21 17:11:27,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 128 transitions, 1621 flow [2024-06-21 17:11:27,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 128 transitions, 1529 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:27,130 INFO L231 Difference]: Finished difference. Result has 128 places, 116 transitions, 1198 flow [2024-06-21 17:11:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1198, PETRI_PLACES=128, PETRI_TRANSITIONS=116} [2024-06-21 17:11:27,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 17:11:27,130 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 116 transitions, 1198 flow [2024-06-21 17:11:27,130 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) [2024-06-21 17:11:27,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:27,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:11:27,131 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 250757506, now seen corresponding path program 5 times [2024-06-21 17:11:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392082299] [2024-06-21 17:11:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:27,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:28,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392082299] [2024-06-21 17:11:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392082299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:28,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:28,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948988446] [2024-06-21 17:11:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:28,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:28,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 116 transitions, 1198 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) [2024-06-21 17:11:28,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:28,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:28,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:28,800 INFO L124 PetriNetUnfolderBase]: 257/510 cut-off events. [2024-06-21 17:11:28,801 INFO L125 PetriNetUnfolderBase]: For 11755/11755 co-relation queries the response was YES. [2024-06-21 17:11:28,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3132 conditions, 510 events. 257/510 cut-off events. For 11755/11755 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2432 event pairs, 40 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 3069. Up to 352 conditions per place. [2024-06-21 17:11:28,804 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 50 changer transitions 0/129 dead transitions. [2024-06-21 17:11:28,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 129 transitions, 1621 flow [2024-06-21 17:11:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:11:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:11:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 17:11:28,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 17:11:28,805 INFO L175 Difference]: Start difference. First operand has 128 places, 116 transitions, 1198 flow. Second operand 10 states and 132 transitions. [2024-06-21 17:11:28,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 129 transitions, 1621 flow [2024-06-21 17:11:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 129 transitions, 1523 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 17:11:28,826 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 1230 flow [2024-06-21 17:11:28,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1230, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2024-06-21 17:11:28,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-21 17:11:28,826 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 1230 flow [2024-06-21 17:11:28,827 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) [2024-06-21 17:11:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:28,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:11:28,827 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:28,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash 555875652, now seen corresponding path program 6 times [2024-06-21 17:11:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192884516] [2024-06-21 17:11:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:29,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:29,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192884516] [2024-06-21 17:11:29,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192884516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:29,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:29,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:29,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226819558] [2024-06-21 17:11:29,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:29,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:29,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 1230 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) [2024-06-21 17:11:29,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:29,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:29,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:30,212 INFO L124 PetriNetUnfolderBase]: 270/537 cut-off events. [2024-06-21 17:11:30,212 INFO L125 PetriNetUnfolderBase]: For 13661/13661 co-relation queries the response was YES. [2024-06-21 17:11:30,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3457 conditions, 537 events. 270/537 cut-off events. For 13661/13661 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2591 event pairs, 42 based on Foata normal form. 1/535 useless extension candidates. Maximal degree in co-relation 3391. Up to 416 conditions per place. [2024-06-21 17:11:30,215 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 94 selfloop transitions, 36 changer transitions 0/134 dead transitions. [2024-06-21 17:11:30,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 134 transitions, 1778 flow [2024-06-21 17:11:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 17:11:30,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-21 17:11:30,216 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 1230 flow. Second operand 9 states and 123 transitions. [2024-06-21 17:11:30,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 134 transitions, 1778 flow [2024-06-21 17:11:30,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1685 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:30,239 INFO L231 Difference]: Finished difference. Result has 139 places, 124 transitions, 1356 flow [2024-06-21 17:11:30,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1356, PETRI_PLACES=139, PETRI_TRANSITIONS=124} [2024-06-21 17:11:30,240 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-21 17:11:30,240 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 124 transitions, 1356 flow [2024-06-21 17:11:30,240 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) [2024-06-21 17:11:30,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:30,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:30,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:11:30,241 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:30,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash 894664990, now seen corresponding path program 7 times [2024-06-21 17:11:30,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:30,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945164117] [2024-06-21 17:11:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:30,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:31,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945164117] [2024-06-21 17:11:31,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945164117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:31,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:31,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:31,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778734391] [2024-06-21 17:11:31,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:31,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:31,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:31,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 124 transitions, 1356 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) [2024-06-21 17:11:31,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:31,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:31,626 INFO L124 PetriNetUnfolderBase]: 268/534 cut-off events. [2024-06-21 17:11:31,626 INFO L125 PetriNetUnfolderBase]: For 13953/13953 co-relation queries the response was YES. [2024-06-21 17:11:31,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3412 conditions, 534 events. 268/534 cut-off events. For 13953/13953 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2585 event pairs, 40 based on Foata normal form. 1/533 useless extension candidates. Maximal degree in co-relation 3344. Up to 431 conditions per place. [2024-06-21 17:11:31,629 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 97 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-21 17:11:31,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 133 transitions, 1640 flow [2024-06-21 17:11:31,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:11:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:11:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 17:11:31,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 17:11:31,631 INFO L175 Difference]: Start difference. First operand has 139 places, 124 transitions, 1356 flow. Second operand 10 states and 128 transitions. [2024-06-21 17:11:31,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 133 transitions, 1640 flow [2024-06-21 17:11:31,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 133 transitions, 1526 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:11:31,660 INFO L231 Difference]: Finished difference. Result has 144 places, 124 transitions, 1311 flow [2024-06-21 17:11:31,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1311, PETRI_PLACES=144, PETRI_TRANSITIONS=124} [2024-06-21 17:11:31,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-21 17:11:31,661 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 124 transitions, 1311 flow [2024-06-21 17:11:31,661 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) [2024-06-21 17:11:31,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:31,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:31,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:11:31,661 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:31,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash 264289778, now seen corresponding path program 8 times [2024-06-21 17:11:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:31,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299322539] [2024-06-21 17:11:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:32,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:32,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299322539] [2024-06-21 17:11:32,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299322539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:32,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826411172] [2024-06-21 17:11:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:32,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:32,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:32,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:32,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 124 transitions, 1311 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) [2024-06-21 17:11:32,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:32,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:32,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:32,865 INFO L124 PetriNetUnfolderBase]: 266/533 cut-off events. [2024-06-21 17:11:32,865 INFO L125 PetriNetUnfolderBase]: For 13553/13553 co-relation queries the response was YES. [2024-06-21 17:11:32,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3313 conditions, 533 events. 266/533 cut-off events. For 13553/13553 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2582 event pairs, 41 based on Foata normal form. 1/533 useless extension candidates. Maximal degree in co-relation 3244. Up to 466 conditions per place. [2024-06-21 17:11:32,869 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 114 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2024-06-21 17:11:32,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 132 transitions, 1585 flow [2024-06-21 17:11:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 17:11:32,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 17:11:32,870 INFO L175 Difference]: Start difference. First operand has 144 places, 124 transitions, 1311 flow. Second operand 9 states and 112 transitions. [2024-06-21 17:11:32,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 132 transitions, 1585 flow [2024-06-21 17:11:32,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 132 transitions, 1478 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:11:32,912 INFO L231 Difference]: Finished difference. Result has 145 places, 124 transitions, 1237 flow [2024-06-21 17:11:32,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1237, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2024-06-21 17:11:32,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 17:11:32,913 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 1237 flow [2024-06-21 17:11:32,913 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) [2024-06-21 17:11:32,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:32,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:11:32,913 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:32,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 894673918, now seen corresponding path program 2 times [2024-06-21 17:11:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:32,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544086406] [2024-06-21 17:11:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:33,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:33,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544086406] [2024-06-21 17:11:33,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544086406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:33,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:33,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125584253] [2024-06-21 17:11:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:33,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:33,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:33,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:33,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 1237 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) [2024-06-21 17:11:33,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:33,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:33,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:34,256 INFO L124 PetriNetUnfolderBase]: 286/575 cut-off events. [2024-06-21 17:11:34,257 INFO L125 PetriNetUnfolderBase]: For 20990/20990 co-relation queries the response was YES. [2024-06-21 17:11:34,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3497 conditions, 575 events. 286/575 cut-off events. For 20990/20990 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2835 event pairs, 46 based on Foata normal form. 12/584 useless extension candidates. Maximal degree in co-relation 3427. Up to 427 conditions per place. [2024-06-21 17:11:34,262 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 102 selfloop transitions, 26 changer transitions 6/138 dead transitions. [2024-06-21 17:11:34,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 138 transitions, 1613 flow [2024-06-21 17:11:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 17:11:34,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-21 17:11:34,264 INFO L175 Difference]: Start difference. First operand has 145 places, 124 transitions, 1237 flow. Second operand 9 states and 123 transitions. [2024-06-21 17:11:34,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 138 transitions, 1613 flow [2024-06-21 17:11:34,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 138 transitions, 1566 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:11:34,297 INFO L231 Difference]: Finished difference. Result has 145 places, 123 transitions, 1253 flow [2024-06-21 17:11:34,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1253, PETRI_PLACES=145, PETRI_TRANSITIONS=123} [2024-06-21 17:11:34,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 17:11:34,298 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 123 transitions, 1253 flow [2024-06-21 17:11:34,298 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) [2024-06-21 17:11:34,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:34,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:34,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:11:34,298 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:34,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash 256255136, now seen corresponding path program 3 times [2024-06-21 17:11:34,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:34,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468696992] [2024-06-21 17:11:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:34,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:35,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468696992] [2024-06-21 17:11:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468696992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:35,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654898027] [2024-06-21 17:11:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:35,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:35,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:35,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 123 transitions, 1253 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) [2024-06-21 17:11:35,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:35,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:35,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:36,053 INFO L124 PetriNetUnfolderBase]: 278/563 cut-off events. [2024-06-21 17:11:36,054 INFO L125 PetriNetUnfolderBase]: For 16457/16457 co-relation queries the response was YES. [2024-06-21 17:11:36,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 563 events. 278/563 cut-off events. For 16457/16457 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2805 event pairs, 44 based on Foata normal form. 2/563 useless extension candidates. Maximal degree in co-relation 3430. Up to 423 conditions per place. [2024-06-21 17:11:36,057 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-21 17:11:36,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 135 transitions, 1573 flow [2024-06-21 17:11:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:11:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:11:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 17:11:36,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 17:11:36,059 INFO L175 Difference]: Start difference. First operand has 145 places, 123 transitions, 1253 flow. Second operand 11 states and 140 transitions. [2024-06-21 17:11:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 135 transitions, 1573 flow [2024-06-21 17:11:36,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 135 transitions, 1507 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:36,089 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 1305 flow [2024-06-21 17:11:36,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1305, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2024-06-21 17:11:36,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-21 17:11:36,090 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 1305 flow [2024-06-21 17:11:36,090 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) [2024-06-21 17:11:36,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:36,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:36,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:11:36,090 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:36,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:36,090 INFO L85 PathProgramCache]: Analyzing trace with hash 541355006, now seen corresponding path program 4 times [2024-06-21 17:11:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:36,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350981942] [2024-06-21 17:11:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:37,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350981942] [2024-06-21 17:11:37,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350981942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:37,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506970470] [2024-06-21 17:11:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:37,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:37,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 1305 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) [2024-06-21 17:11:37,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:37,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:37,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:37,890 INFO L124 PetriNetUnfolderBase]: 285/582 cut-off events. [2024-06-21 17:11:37,890 INFO L125 PetriNetUnfolderBase]: For 17496/17496 co-relation queries the response was YES. [2024-06-21 17:11:37,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3630 conditions, 582 events. 285/582 cut-off events. For 17496/17496 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2919 event pairs, 47 based on Foata normal form. 2/583 useless extension candidates. Maximal degree in co-relation 3558. Up to 505 conditions per place. [2024-06-21 17:11:37,894 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-21 17:11:37,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 138 transitions, 1645 flow [2024-06-21 17:11:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:11:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:11:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 17:11:37,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 17:11:37,901 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 1305 flow. Second operand 11 states and 132 transitions. [2024-06-21 17:11:37,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 138 transitions, 1645 flow [2024-06-21 17:11:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 138 transitions, 1531 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 17:11:37,949 INFO L231 Difference]: Finished difference. Result has 151 places, 128 transitions, 1288 flow [2024-06-21 17:11:37,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1288, PETRI_PLACES=151, PETRI_TRANSITIONS=128} [2024-06-21 17:11:37,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-21 17:11:37,951 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 128 transitions, 1288 flow [2024-06-21 17:11:37,951 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) [2024-06-21 17:11:37,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:37,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:37,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:11:37,952 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:37,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 551830526, now seen corresponding path program 5 times [2024-06-21 17:11:37,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:37,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740995894] [2024-06-21 17:11:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:37,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:39,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:39,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740995894] [2024-06-21 17:11:39,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740995894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:39,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:39,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:39,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400857510] [2024-06-21 17:11:39,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:39,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:39,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:39,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:39,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:39,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 128 transitions, 1288 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) [2024-06-21 17:11:39,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:39,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:39,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:39,604 INFO L124 PetriNetUnfolderBase]: 289/592 cut-off events. [2024-06-21 17:11:39,605 INFO L125 PetriNetUnfolderBase]: For 18193/18193 co-relation queries the response was YES. [2024-06-21 17:11:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 592 events. 289/592 cut-off events. For 18193/18193 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3002 event pairs, 45 based on Foata normal form. 2/593 useless extension candidates. Maximal degree in co-relation 3562. Up to 484 conditions per place. [2024-06-21 17:11:39,609 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 116 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-21 17:11:39,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 142 transitions, 1700 flow [2024-06-21 17:11:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:11:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:11:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 17:11:39,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 17:11:39,610 INFO L175 Difference]: Start difference. First operand has 151 places, 128 transitions, 1288 flow. Second operand 11 states and 136 transitions. [2024-06-21 17:11:39,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 142 transitions, 1700 flow [2024-06-21 17:11:39,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 142 transitions, 1641 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:39,646 INFO L231 Difference]: Finished difference. Result has 155 places, 129 transitions, 1309 flow [2024-06-21 17:11:39,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1309, PETRI_PLACES=155, PETRI_TRANSITIONS=129} [2024-06-21 17:11:39,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 17:11:39,646 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 129 transitions, 1309 flow [2024-06-21 17:11:39,647 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) [2024-06-21 17:11:39,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:39,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:39,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:11:39,647 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:39,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 551474336, now seen corresponding path program 6 times [2024-06-21 17:11:39,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:39,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725816646] [2024-06-21 17:11:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:39,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:40,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:40,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725816646] [2024-06-21 17:11:40,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725816646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:40,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:40,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:40,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933437884] [2024-06-21 17:11:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:40,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:40,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 129 transitions, 1309 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) [2024-06-21 17:11:40,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:40,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:40,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:40,972 INFO L124 PetriNetUnfolderBase]: 286/585 cut-off events. [2024-06-21 17:11:40,972 INFO L125 PetriNetUnfolderBase]: For 17118/17118 co-relation queries the response was YES. [2024-06-21 17:11:40,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 585 events. 286/585 cut-off events. For 17118/17118 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2950 event pairs, 46 based on Foata normal form. 2/586 useless extension candidates. Maximal degree in co-relation 3427. Up to 496 conditions per place. [2024-06-21 17:11:40,977 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 115 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2024-06-21 17:11:40,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 138 transitions, 1597 flow [2024-06-21 17:11:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 17:11:40,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 17:11:40,981 INFO L175 Difference]: Start difference. First operand has 155 places, 129 transitions, 1309 flow. Second operand 9 states and 114 transitions. [2024-06-21 17:11:40,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 138 transitions, 1597 flow [2024-06-21 17:11:41,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 138 transitions, 1487 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-06-21 17:11:41,029 INFO L231 Difference]: Finished difference. Result has 153 places, 129 transitions, 1243 flow [2024-06-21 17:11:41,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1243, PETRI_PLACES=153, PETRI_TRANSITIONS=129} [2024-06-21 17:11:41,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 17:11:41,030 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 129 transitions, 1243 flow [2024-06-21 17:11:41,030 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) [2024-06-21 17:11:41,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:41,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:11:41,031 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:41,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1164256147, now seen corresponding path program 1 times [2024-06-21 17:11:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86431919] [2024-06-21 17:11:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:42,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86431919] [2024-06-21 17:11:42,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86431919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:42,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:42,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145556239] [2024-06-21 17:11:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:42,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:42,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:42,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 129 transitions, 1243 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) [2024-06-21 17:11:42,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:42,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:42,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:42,500 INFO L124 PetriNetUnfolderBase]: 290/593 cut-off events. [2024-06-21 17:11:42,500 INFO L125 PetriNetUnfolderBase]: For 16876/16876 co-relation queries the response was YES. [2024-06-21 17:11:42,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 593 events. 290/593 cut-off events. For 16876/16876 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3000 event pairs, 40 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 3337. Up to 500 conditions per place. [2024-06-21 17:11:42,504 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 117 selfloop transitions, 20 changer transitions 2/143 dead transitions. [2024-06-21 17:11:42,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 143 transitions, 1577 flow [2024-06-21 17:11:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 17:11:42,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 17:11:42,505 INFO L175 Difference]: Start difference. First operand has 153 places, 129 transitions, 1243 flow. Second operand 9 states and 115 transitions. [2024-06-21 17:11:42,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 143 transitions, 1577 flow [2024-06-21 17:11:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 143 transitions, 1535 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:11:42,540 INFO L231 Difference]: Finished difference. Result has 155 places, 130 transitions, 1266 flow [2024-06-21 17:11:42,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1266, PETRI_PLACES=155, PETRI_TRANSITIONS=130} [2024-06-21 17:11:42,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 17:11:42,541 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 130 transitions, 1266 flow [2024-06-21 17:11:42,541 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) [2024-06-21 17:11:42,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:42,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:42,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:11:42,542 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:42,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1164404017, now seen corresponding path program 2 times [2024-06-21 17:11:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:42,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355168472] [2024-06-21 17:11:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:42,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:43,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355168472] [2024-06-21 17:11:43,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355168472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:43,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:43,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:43,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741058080] [2024-06-21 17:11:43,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:43,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:43,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:43,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:43,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:43,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:43,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 130 transitions, 1266 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) [2024-06-21 17:11:43,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:43,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:43,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:43,783 INFO L124 PetriNetUnfolderBase]: 280/569 cut-off events. [2024-06-21 17:11:43,783 INFO L125 PetriNetUnfolderBase]: For 16361/16361 co-relation queries the response was YES. [2024-06-21 17:11:43,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3304 conditions, 569 events. 280/569 cut-off events. For 16361/16361 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2835 event pairs, 36 based on Foata normal form. 2/570 useless extension candidates. Maximal degree in co-relation 3231. Up to 476 conditions per place. [2024-06-21 17:11:43,787 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 120 selfloop transitions, 19 changer transitions 0/143 dead transitions. [2024-06-21 17:11:43,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 143 transitions, 1584 flow [2024-06-21 17:11:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 17:11:43,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 17:11:43,788 INFO L175 Difference]: Start difference. First operand has 155 places, 130 transitions, 1266 flow. Second operand 9 states and 115 transitions. [2024-06-21 17:11:43,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 143 transitions, 1584 flow [2024-06-21 17:11:43,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 143 transitions, 1535 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:43,826 INFO L231 Difference]: Finished difference. Result has 158 places, 131 transitions, 1273 flow [2024-06-21 17:11:43,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1273, PETRI_PLACES=158, PETRI_TRANSITIONS=131} [2024-06-21 17:11:43,826 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-21 17:11:43,827 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 131 transitions, 1273 flow [2024-06-21 17:11:43,827 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) [2024-06-21 17:11:43,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:43,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:43,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:11:43,827 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:43,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash -125108499, now seen corresponding path program 3 times [2024-06-21 17:11:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:43,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515784355] [2024-06-21 17:11:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:44,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515784355] [2024-06-21 17:11:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515784355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:44,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:44,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595275818] [2024-06-21 17:11:44,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:44,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:44,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:44,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 131 transitions, 1273 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) [2024-06-21 17:11:44,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:44,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:44,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:45,055 INFO L124 PetriNetUnfolderBase]: 284/577 cut-off events. [2024-06-21 17:11:45,055 INFO L125 PetriNetUnfolderBase]: For 17319/17319 co-relation queries the response was YES. [2024-06-21 17:11:45,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3347 conditions, 577 events. 284/577 cut-off events. For 17319/17319 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2891 event pairs, 40 based on Foata normal form. 2/578 useless extension candidates. Maximal degree in co-relation 3273. Up to 477 conditions per place. [2024-06-21 17:11:45,059 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 114 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-06-21 17:11:45,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 143 transitions, 1591 flow [2024-06-21 17:11:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 17:11:45,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:45,060 INFO L175 Difference]: Start difference. First operand has 158 places, 131 transitions, 1273 flow. Second operand 9 states and 117 transitions. [2024-06-21 17:11:45,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 143 transitions, 1591 flow [2024-06-21 17:11:45,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 143 transitions, 1545 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:45,098 INFO L231 Difference]: Finished difference. Result has 160 places, 132 transitions, 1297 flow [2024-06-21 17:11:45,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1297, PETRI_PLACES=160, PETRI_TRANSITIONS=132} [2024-06-21 17:11:45,098 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 17:11:45,098 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 132 transitions, 1297 flow [2024-06-21 17:11:45,099 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) [2024-06-21 17:11:45,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:45,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:45,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:11:45,099 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:45,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1697670315, now seen corresponding path program 4 times [2024-06-21 17:11:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:45,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4418678] [2024-06-21 17:11:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:45,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:45,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4418678] [2024-06-21 17:11:45,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4418678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:45,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:45,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244575138] [2024-06-21 17:11:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:45,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:45,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 132 transitions, 1297 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) [2024-06-21 17:11:45,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:45,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:45,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:46,263 INFO L124 PetriNetUnfolderBase]: 288/585 cut-off events. [2024-06-21 17:11:46,263 INFO L125 PetriNetUnfolderBase]: For 17985/17985 co-relation queries the response was YES. [2024-06-21 17:11:46,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3410 conditions, 585 events. 288/585 cut-off events. For 17985/17985 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2938 event pairs, 31 based on Foata normal form. 2/586 useless extension candidates. Maximal degree in co-relation 3335. Up to 450 conditions per place. [2024-06-21 17:11:46,268 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 125 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-21 17:11:46,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 148 transitions, 1637 flow [2024-06-21 17:11:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 17:11:46,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:46,269 INFO L175 Difference]: Start difference. First operand has 160 places, 132 transitions, 1297 flow. Second operand 9 states and 117 transitions. [2024-06-21 17:11:46,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 148 transitions, 1637 flow [2024-06-21 17:11:46,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 148 transitions, 1577 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:46,324 INFO L231 Difference]: Finished difference. Result has 162 places, 133 transitions, 1298 flow [2024-06-21 17:11:46,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1298, PETRI_PLACES=162, PETRI_TRANSITIONS=133} [2024-06-21 17:11:46,325 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2024-06-21 17:11:46,325 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 133 transitions, 1298 flow [2024-06-21 17:11:46,325 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) [2024-06-21 17:11:46,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:46,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:46,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:11:46,326 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:46,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:46,326 INFO L85 PathProgramCache]: Analyzing trace with hash -443462991, now seen corresponding path program 5 times [2024-06-21 17:11:46,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:46,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140130946] [2024-06-21 17:11:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:46,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:47,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:47,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140130946] [2024-06-21 17:11:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140130946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:47,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:47,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464835238] [2024-06-21 17:11:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:47,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:47,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 133 transitions, 1298 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) [2024-06-21 17:11:47,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:47,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:47,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:47,616 INFO L124 PetriNetUnfolderBase]: 292/593 cut-off events. [2024-06-21 17:11:47,616 INFO L125 PetriNetUnfolderBase]: For 19013/19013 co-relation queries the response was YES. [2024-06-21 17:11:47,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 593 events. 292/593 cut-off events. For 19013/19013 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2984 event pairs, 37 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 3387. Up to 495 conditions per place. [2024-06-21 17:11:47,620 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 126 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-21 17:11:47,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 148 transitions, 1638 flow [2024-06-21 17:11:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 17:11:47,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 17:11:47,622 INFO L175 Difference]: Start difference. First operand has 162 places, 133 transitions, 1298 flow. Second operand 9 states and 118 transitions. [2024-06-21 17:11:47,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 148 transitions, 1638 flow [2024-06-21 17:11:47,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 148 transitions, 1589 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:47,665 INFO L231 Difference]: Finished difference. Result has 164 places, 134 transitions, 1309 flow [2024-06-21 17:11:47,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=164, PETRI_TRANSITIONS=134} [2024-06-21 17:11:47,665 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-21 17:11:47,665 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 134 transitions, 1309 flow [2024-06-21 17:11:47,666 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) [2024-06-21 17:11:47,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:47,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:47,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:11:47,666 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:47,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash -443315121, now seen corresponding path program 6 times [2024-06-21 17:11:47,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:47,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119106517] [2024-06-21 17:11:47,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:47,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119106517] [2024-06-21 17:11:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119106517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:48,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:48,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454006288] [2024-06-21 17:11:48,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:48,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:48,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:48,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 134 transitions, 1309 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) [2024-06-21 17:11:48,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:48,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:48,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:49,173 INFO L124 PetriNetUnfolderBase]: 296/601 cut-off events. [2024-06-21 17:11:49,173 INFO L125 PetriNetUnfolderBase]: For 19918/19918 co-relation queries the response was YES. [2024-06-21 17:11:49,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 601 events. 296/601 cut-off events. For 19918/19918 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3054 event pairs, 39 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 3437. Up to 508 conditions per place. [2024-06-21 17:11:49,177 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 125 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-21 17:11:49,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 148 transitions, 1649 flow [2024-06-21 17:11:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 17:11:49,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 17:11:49,179 INFO L175 Difference]: Start difference. First operand has 164 places, 134 transitions, 1309 flow. Second operand 9 states and 118 transitions. [2024-06-21 17:11:49,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 148 transitions, 1649 flow [2024-06-21 17:11:49,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 148 transitions, 1599 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:49,226 INFO L231 Difference]: Finished difference. Result has 166 places, 135 transitions, 1323 flow [2024-06-21 17:11:49,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1323, PETRI_PLACES=166, PETRI_TRANSITIONS=135} [2024-06-21 17:11:49,226 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-21 17:11:49,226 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 135 transitions, 1323 flow [2024-06-21 17:11:49,226 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) [2024-06-21 17:11:49,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:49,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:11:49,227 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:49,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:49,227 INFO L85 PathProgramCache]: Analyzing trace with hash -117750897, now seen corresponding path program 1 times [2024-06-21 17:11:49,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:49,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943869380] [2024-06-21 17:11:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:50,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943869380] [2024-06-21 17:11:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943869380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:50,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:50,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:50,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940783864] [2024-06-21 17:11:50,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:50,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:50,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:50,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 135 transitions, 1323 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) [2024-06-21 17:11:50,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:50,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:50,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:50,810 INFO L124 PetriNetUnfolderBase]: 299/606 cut-off events. [2024-06-21 17:11:50,810 INFO L125 PetriNetUnfolderBase]: For 19791/19791 co-relation queries the response was YES. [2024-06-21 17:11:50,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3559 conditions, 606 events. 299/606 cut-off events. For 19791/19791 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3076 event pairs, 42 based on Foata normal form. 1/606 useless extension candidates. Maximal degree in co-relation 3481. Up to 498 conditions per place. [2024-06-21 17:11:50,814 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 30 changer transitions 0/148 dead transitions. [2024-06-21 17:11:50,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 148 transitions, 1679 flow [2024-06-21 17:11:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:11:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:11:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 17:11:50,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 17:11:50,815 INFO L175 Difference]: Start difference. First operand has 166 places, 135 transitions, 1323 flow. Second operand 10 states and 129 transitions. [2024-06-21 17:11:50,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 148 transitions, 1679 flow [2024-06-21 17:11:50,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 148 transitions, 1625 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:50,861 INFO L231 Difference]: Finished difference. Result has 169 places, 137 transitions, 1380 flow [2024-06-21 17:11:50,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1380, PETRI_PLACES=169, PETRI_TRANSITIONS=137} [2024-06-21 17:11:50,861 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 17:11:50,861 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 137 transitions, 1380 flow [2024-06-21 17:11:50,862 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) [2024-06-21 17:11:50,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:50,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:50,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:11:50,862 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:50,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash 216194809, now seen corresponding path program 2 times [2024-06-21 17:11:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:50,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731663726] [2024-06-21 17:11:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:50,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:52,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731663726] [2024-06-21 17:11:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731663726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:52,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:52,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437329765] [2024-06-21 17:11:52,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:52,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:52,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 137 transitions, 1380 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) [2024-06-21 17:11:52,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:52,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:52,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:52,963 INFO L124 PetriNetUnfolderBase]: 297/603 cut-off events. [2024-06-21 17:11:52,963 INFO L125 PetriNetUnfolderBase]: For 19163/19163 co-relation queries the response was YES. [2024-06-21 17:11:52,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3496 conditions, 603 events. 297/603 cut-off events. For 19163/19163 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3080 event pairs, 42 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 3417. Up to 495 conditions per place. [2024-06-21 17:11:52,967 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 30 changer transitions 0/148 dead transitions. [2024-06-21 17:11:52,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 148 transitions, 1694 flow [2024-06-21 17:11:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:11:52,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:11:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 17:11:52,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:52,969 INFO L175 Difference]: Start difference. First operand has 169 places, 137 transitions, 1380 flow. Second operand 10 states and 130 transitions. [2024-06-21 17:11:52,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 148 transitions, 1694 flow [2024-06-21 17:11:53,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 148 transitions, 1564 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:53,019 INFO L231 Difference]: Finished difference. Result has 172 places, 137 transitions, 1315 flow [2024-06-21 17:11:53,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1315, PETRI_PLACES=172, PETRI_TRANSITIONS=137} [2024-06-21 17:11:53,020 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 17:11:53,020 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 137 transitions, 1315 flow [2024-06-21 17:11:53,020 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) [2024-06-21 17:11:53,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:53,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:53,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:11:53,021 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:53,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash -141668553, now seen corresponding path program 7 times [2024-06-21 17:11:53,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:53,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360020617] [2024-06-21 17:11:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:53,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360020617] [2024-06-21 17:11:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360020617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:53,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:53,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773711124] [2024-06-21 17:11:53,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:54,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:54,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 137 transitions, 1315 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) [2024-06-21 17:11:54,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:54,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:54,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:54,309 INFO L124 PetriNetUnfolderBase]: 301/611 cut-off events. [2024-06-21 17:11:54,309 INFO L125 PetriNetUnfolderBase]: For 21091/21091 co-relation queries the response was YES. [2024-06-21 17:11:54,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3510 conditions, 611 events. 301/611 cut-off events. For 21091/21091 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3134 event pairs, 45 based on Foata normal form. 2/611 useless extension candidates. Maximal degree in co-relation 3430. Up to 510 conditions per place. [2024-06-21 17:11:54,313 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 118 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-06-21 17:11:54,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 147 transitions, 1643 flow [2024-06-21 17:11:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 17:11:54,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:54,314 INFO L175 Difference]: Start difference. First operand has 172 places, 137 transitions, 1315 flow. Second operand 9 states and 117 transitions. [2024-06-21 17:11:54,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 147 transitions, 1643 flow [2024-06-21 17:11:54,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 147 transitions, 1533 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 17:11:54,361 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1283 flow [2024-06-21 17:11:54,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2024-06-21 17:11:54,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-21 17:11:54,361 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1283 flow [2024-06-21 17:11:54,362 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) [2024-06-21 17:11:54,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:54,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:54,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:11:54,362 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:54,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:54,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1758152303, now seen corresponding path program 8 times [2024-06-21 17:11:54,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:54,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149818740] [2024-06-21 17:11:54,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:55,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:55,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149818740] [2024-06-21 17:11:55,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149818740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:55,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:55,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:55,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275688696] [2024-06-21 17:11:55,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:55,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1283 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) [2024-06-21 17:11:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:55,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:55,589 INFO L124 PetriNetUnfolderBase]: 305/619 cut-off events. [2024-06-21 17:11:55,590 INFO L125 PetriNetUnfolderBase]: For 22141/22141 co-relation queries the response was YES. [2024-06-21 17:11:55,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3551 conditions, 619 events. 305/619 cut-off events. For 22141/22141 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3198 event pairs, 43 based on Foata normal form. 2/619 useless extension candidates. Maximal degree in co-relation 3470. Up to 524 conditions per place. [2024-06-21 17:11:55,593 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 122 selfloop transitions, 22 changer transitions 1/149 dead transitions. [2024-06-21 17:11:55,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 149 transitions, 1626 flow [2024-06-21 17:11:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 17:11:55,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 17:11:55,594 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1283 flow. Second operand 9 states and 115 transitions. [2024-06-21 17:11:55,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 149 transitions, 1626 flow [2024-06-21 17:11:55,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 149 transitions, 1556 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:55,643 INFO L231 Difference]: Finished difference. Result has 174 places, 139 transitions, 1293 flow [2024-06-21 17:11:55,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1293, PETRI_PLACES=174, PETRI_TRANSITIONS=139} [2024-06-21 17:11:55,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 17:11:55,644 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 139 transitions, 1293 flow [2024-06-21 17:11:55,644 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) [2024-06-21 17:11:55,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:55,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:55,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:11:55,645 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:55,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:55,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1666667495, now seen corresponding path program 9 times [2024-06-21 17:11:55,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:55,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683770403] [2024-06-21 17:11:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:55,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683770403] [2024-06-21 17:11:56,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683770403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:56,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:56,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:56,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663740473] [2024-06-21 17:11:56,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:56,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:56,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:56,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 139 transitions, 1293 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) [2024-06-21 17:11:56,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:56,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:56,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:56,965 INFO L124 PetriNetUnfolderBase]: 297/599 cut-off events. [2024-06-21 17:11:56,965 INFO L125 PetriNetUnfolderBase]: For 22541/22541 co-relation queries the response was YES. [2024-06-21 17:11:56,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3458 conditions, 599 events. 297/599 cut-off events. For 22541/22541 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3068 event pairs, 43 based on Foata normal form. 2/599 useless extension candidates. Maximal degree in co-relation 3375. Up to 472 conditions per place. [2024-06-21 17:11:56,969 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 110 selfloop transitions, 35 changer transitions 0/149 dead transitions. [2024-06-21 17:11:56,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 149 transitions, 1629 flow [2024-06-21 17:11:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 17:11:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:11:56,970 INFO L175 Difference]: Start difference. First operand has 174 places, 139 transitions, 1293 flow. Second operand 9 states and 117 transitions. [2024-06-21 17:11:56,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 149 transitions, 1629 flow [2024-06-21 17:11:57,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 149 transitions, 1559 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:11:57,022 INFO L231 Difference]: Finished difference. Result has 177 places, 140 transitions, 1325 flow [2024-06-21 17:11:57,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=177, PETRI_TRANSITIONS=140} [2024-06-21 17:11:57,022 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-21 17:11:57,022 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 140 transitions, 1325 flow [2024-06-21 17:11:57,022 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) [2024-06-21 17:11:57,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:57,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:57,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:11:57,023 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:57,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1758004433, now seen corresponding path program 10 times [2024-06-21 17:11:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:57,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588722407] [2024-06-21 17:11:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:57,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588722407] [2024-06-21 17:11:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588722407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:57,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:57,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:11:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297687641] [2024-06-21 17:11:57,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:11:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:11:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:11:57,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:57,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 140 transitions, 1325 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) [2024-06-21 17:11:57,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:57,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:57,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:11:58,182 INFO L124 PetriNetUnfolderBase]: 294/594 cut-off events. [2024-06-21 17:11:58,182 INFO L125 PetriNetUnfolderBase]: For 20686/20686 co-relation queries the response was YES. [2024-06-21 17:11:58,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 594 events. 294/594 cut-off events. For 20686/20686 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3063 event pairs, 40 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 3234. Up to 494 conditions per place. [2024-06-21 17:11:58,186 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 124 selfloop transitions, 22 changer transitions 0/150 dead transitions. [2024-06-21 17:11:58,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 150 transitions, 1639 flow [2024-06-21 17:11:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:11:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:11:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 17:11:58,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 17:11:58,187 INFO L175 Difference]: Start difference. First operand has 177 places, 140 transitions, 1325 flow. Second operand 9 states and 115 transitions. [2024-06-21 17:11:58,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 150 transitions, 1639 flow [2024-06-21 17:11:58,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 150 transitions, 1547 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:11:58,246 INFO L231 Difference]: Finished difference. Result has 179 places, 140 transitions, 1281 flow [2024-06-21 17:11:58,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1281, PETRI_PLACES=179, PETRI_TRANSITIONS=140} [2024-06-21 17:11:58,247 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 17:11:58,247 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 140 transitions, 1281 flow [2024-06-21 17:11:58,247 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) [2024-06-21 17:11:58,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:11:58,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:11:58,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:11:58,247 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:11:58,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:11:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash 59895369, now seen corresponding path program 3 times [2024-06-21 17:11:58,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:11:58,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511596729] [2024-06-21 17:11:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:11:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:11:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:11:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:11:59,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:11:59,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511596729] [2024-06-21 17:11:59,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511596729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:11:59,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:11:59,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:11:59,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439296591] [2024-06-21 17:11:59,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:11:59,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:11:59,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:11:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:11:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:11:59,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:11:59,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 140 transitions, 1281 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) [2024-06-21 17:11:59,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:11:59,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:11:59,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:00,050 INFO L124 PetriNetUnfolderBase]: 292/591 cut-off events. [2024-06-21 17:12:00,050 INFO L125 PetriNetUnfolderBase]: For 18516/18516 co-relation queries the response was YES. [2024-06-21 17:12:00,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3191 conditions, 591 events. 292/591 cut-off events. For 18516/18516 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3047 event pairs, 42 based on Foata normal form. 1/590 useless extension candidates. Maximal degree in co-relation 3106. Up to 475 conditions per place. [2024-06-21 17:12:00,054 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 34 changer transitions 0/150 dead transitions. [2024-06-21 17:12:00,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 150 transitions, 1697 flow [2024-06-21 17:12:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 17:12:00,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 17:12:00,055 INFO L175 Difference]: Start difference. First operand has 179 places, 140 transitions, 1281 flow. Second operand 10 states and 131 transitions. [2024-06-21 17:12:00,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 150 transitions, 1697 flow [2024-06-21 17:12:00,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 150 transitions, 1569 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:00,108 INFO L231 Difference]: Finished difference. Result has 181 places, 140 transitions, 1226 flow [2024-06-21 17:12:00,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1226, PETRI_PLACES=181, PETRI_TRANSITIONS=140} [2024-06-21 17:12:00,108 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-21 17:12:00,109 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 140 transitions, 1226 flow [2024-06-21 17:12:00,109 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) [2024-06-21 17:12:00,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:00,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:12:00,109 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 59628459, now seen corresponding path program 4 times [2024-06-21 17:12:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951647023] [2024-06-21 17:12:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:01,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:01,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951647023] [2024-06-21 17:12:01,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951647023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:01,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:01,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:01,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867344441] [2024-06-21 17:12:01,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:01,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:01,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:01,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:01,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 140 transitions, 1226 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) [2024-06-21 17:12:01,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:01,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:02,253 INFO L124 PetriNetUnfolderBase]: 295/594 cut-off events. [2024-06-21 17:12:02,253 INFO L125 PetriNetUnfolderBase]: For 18859/18859 co-relation queries the response was YES. [2024-06-21 17:12:02,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3170 conditions, 594 events. 295/594 cut-off events. For 18859/18859 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3043 event pairs, 39 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 3084. Up to 470 conditions per place. [2024-06-21 17:12:02,257 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 34 changer transitions 0/151 dead transitions. [2024-06-21 17:12:02,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 151 transitions, 1588 flow [2024-06-21 17:12:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 17:12:02,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:12:02,258 INFO L175 Difference]: Start difference. First operand has 181 places, 140 transitions, 1226 flow. Second operand 10 states and 130 transitions. [2024-06-21 17:12:02,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 151 transitions, 1588 flow [2024-06-21 17:12:02,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 151 transitions, 1471 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 17:12:02,300 INFO L231 Difference]: Finished difference. Result has 181 places, 142 transitions, 1234 flow [2024-06-21 17:12:02,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1234, PETRI_PLACES=181, PETRI_TRANSITIONS=142} [2024-06-21 17:12:02,301 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-21 17:12:02,301 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 142 transitions, 1234 flow [2024-06-21 17:12:02,301 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) [2024-06-21 17:12:02,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:02,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:02,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:12:02,301 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:02,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:02,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1957460045, now seen corresponding path program 5 times [2024-06-21 17:12:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:02,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424752228] [2024-06-21 17:12:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:03,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424752228] [2024-06-21 17:12:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424752228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:03,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:03,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:03,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613791588] [2024-06-21 17:12:03,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:03,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:03,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:03,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 142 transitions, 1234 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) [2024-06-21 17:12:03,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:03,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:04,043 INFO L124 PetriNetUnfolderBase]: 293/593 cut-off events. [2024-06-21 17:12:04,044 INFO L125 PetriNetUnfolderBase]: For 17979/17979 co-relation queries the response was YES. [2024-06-21 17:12:04,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 593 events. 293/593 cut-off events. For 17979/17979 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3060 event pairs, 42 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2954. Up to 477 conditions per place. [2024-06-21 17:12:04,047 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 36 changer transitions 0/151 dead transitions. [2024-06-21 17:12:04,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 151 transitions, 1548 flow [2024-06-21 17:12:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 17:12:04,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 17:12:04,048 INFO L175 Difference]: Start difference. First operand has 181 places, 142 transitions, 1234 flow. Second operand 10 states and 132 transitions. [2024-06-21 17:12:04,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 151 transitions, 1548 flow [2024-06-21 17:12:04,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 151 transitions, 1423 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:04,094 INFO L231 Difference]: Finished difference. Result has 183 places, 142 transitions, 1186 flow [2024-06-21 17:12:04,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1186, PETRI_PLACES=183, PETRI_TRANSITIONS=142} [2024-06-21 17:12:04,095 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-21 17:12:04,095 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 142 transitions, 1186 flow [2024-06-21 17:12:04,095 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) [2024-06-21 17:12:04,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:04,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:04,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:12:04,095 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:04,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash -84173845, now seen corresponding path program 6 times [2024-06-21 17:12:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:04,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537800845] [2024-06-21 17:12:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:05,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:05,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537800845] [2024-06-21 17:12:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537800845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:05,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:05,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324029182] [2024-06-21 17:12:05,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:05,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:05,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:05,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:05,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:05,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 142 transitions, 1186 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) [2024-06-21 17:12:05,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:05,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:05,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:05,613 INFO L124 PetriNetUnfolderBase]: 301/610 cut-off events. [2024-06-21 17:12:05,613 INFO L125 PetriNetUnfolderBase]: For 20201/20201 co-relation queries the response was YES. [2024-06-21 17:12:05,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3189 conditions, 610 events. 301/610 cut-off events. For 20201/20201 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3154 event pairs, 43 based on Foata normal form. 1/610 useless extension candidates. Maximal degree in co-relation 3102. Up to 519 conditions per place. [2024-06-21 17:12:05,616 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 130 selfloop transitions, 23 changer transitions 0/157 dead transitions. [2024-06-21 17:12:05,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 157 transitions, 1716 flow [2024-06-21 17:12:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 17:12:05,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 17:12:05,617 INFO L175 Difference]: Start difference. First operand has 183 places, 142 transitions, 1186 flow. Second operand 11 states and 138 transitions. [2024-06-21 17:12:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 157 transitions, 1716 flow [2024-06-21 17:12:05,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 157 transitions, 1630 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:05,675 INFO L231 Difference]: Finished difference. Result has 185 places, 146 transitions, 1247 flow [2024-06-21 17:12:05,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1247, PETRI_PLACES=185, PETRI_TRANSITIONS=146} [2024-06-21 17:12:05,676 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 17:12:05,676 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 146 transitions, 1247 flow [2024-06-21 17:12:05,676 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) [2024-06-21 17:12:05,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:05,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:12:05,676 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:05,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1409692313, now seen corresponding path program 7 times [2024-06-21 17:12:05,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:05,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781539255] [2024-06-21 17:12:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:07,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:07,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781539255] [2024-06-21 17:12:07,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781539255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:07,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:07,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:07,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237351512] [2024-06-21 17:12:07,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:07,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:07,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:07,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:07,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:07,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 146 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) [2024-06-21 17:12:07,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:07,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:07,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:07,522 INFO L124 PetriNetUnfolderBase]: 304/615 cut-off events. [2024-06-21 17:12:07,522 INFO L125 PetriNetUnfolderBase]: For 21254/21254 co-relation queries the response was YES. [2024-06-21 17:12:07,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 615 events. 304/615 cut-off events. For 21254/21254 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3189 event pairs, 43 based on Foata normal form. 1/615 useless extension candidates. Maximal degree in co-relation 3155. Up to 523 conditions per place. [2024-06-21 17:12:07,527 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-21 17:12:07,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 157 transitions, 1733 flow [2024-06-21 17:12:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:12:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:12:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 17:12:07,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:12:07,529 INFO L175 Difference]: Start difference. First operand has 185 places, 146 transitions, 1247 flow. Second operand 9 states and 117 transitions. [2024-06-21 17:12:07,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 157 transitions, 1733 flow [2024-06-21 17:12:07,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 157 transitions, 1631 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:07,587 INFO L231 Difference]: Finished difference. Result has 185 places, 148 transitions, 1256 flow [2024-06-21 17:12:07,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1256, PETRI_PLACES=185, PETRI_TRANSITIONS=148} [2024-06-21 17:12:07,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 17:12:07,587 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 148 transitions, 1256 flow [2024-06-21 17:12:07,588 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) [2024-06-21 17:12:07,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:07,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:07,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:12:07,588 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:07,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash -560938097, now seen corresponding path program 8 times [2024-06-21 17:12:07,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:07,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682550617] [2024-06-21 17:12:07,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:07,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:08,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:08,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682550617] [2024-06-21 17:12:08,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682550617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:08,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:08,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:08,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84823649] [2024-06-21 17:12:08,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:08,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:08,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:08,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:08,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:09,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:09,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 148 transitions, 1256 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) [2024-06-21 17:12:09,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:09,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:09,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:09,408 INFO L124 PetriNetUnfolderBase]: 302/612 cut-off events. [2024-06-21 17:12:09,409 INFO L125 PetriNetUnfolderBase]: For 19918/19918 co-relation queries the response was YES. [2024-06-21 17:12:09,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 612 events. 302/612 cut-off events. For 19918/19918 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3168 event pairs, 43 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 3055. Up to 536 conditions per place. [2024-06-21 17:12:09,413 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 17 changer transitions 0/157 dead transitions. [2024-06-21 17:12:09,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 157 transitions, 1582 flow [2024-06-21 17:12:09,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 17:12:09,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 17:12:09,415 INFO L175 Difference]: Start difference. First operand has 185 places, 148 transitions, 1256 flow. Second operand 10 states and 123 transitions. [2024-06-21 17:12:09,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 157 transitions, 1582 flow [2024-06-21 17:12:09,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 157 transitions, 1481 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:09,466 INFO L231 Difference]: Finished difference. Result has 187 places, 148 transitions, 1194 flow [2024-06-21 17:12:09,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1194, PETRI_PLACES=187, PETRI_TRANSITIONS=148} [2024-06-21 17:12:09,467 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-21 17:12:09,467 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 148 transitions, 1194 flow [2024-06-21 17:12:09,467 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) [2024-06-21 17:12:09,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:09,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:09,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:12:09,468 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:09,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash -809099475, now seen corresponding path program 9 times [2024-06-21 17:12:09,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:09,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599687243] [2024-06-21 17:12:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:09,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599687243] [2024-06-21 17:12:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599687243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:11,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:11,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:11,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319645745] [2024-06-21 17:12:11,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:11,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:11,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:11,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 148 transitions, 1194 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) [2024-06-21 17:12:11,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:11,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:11,663 INFO L124 PetriNetUnfolderBase]: 305/617 cut-off events. [2024-06-21 17:12:11,663 INFO L125 PetriNetUnfolderBase]: For 19266/19266 co-relation queries the response was YES. [2024-06-21 17:12:11,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 617 events. 305/617 cut-off events. For 19266/19266 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3217 event pairs, 42 based on Foata normal form. 1/616 useless extension candidates. Maximal degree in co-relation 3032. Up to 451 conditions per place. [2024-06-21 17:12:11,667 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 50 changer transitions 0/159 dead transitions. [2024-06-21 17:12:11,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 159 transitions, 1574 flow [2024-06-21 17:12:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 17:12:11,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 17:12:11,669 INFO L175 Difference]: Start difference. First operand has 187 places, 148 transitions, 1194 flow. Second operand 10 states and 132 transitions. [2024-06-21 17:12:11,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 159 transitions, 1574 flow [2024-06-21 17:12:11,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 159 transitions, 1529 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:11,723 INFO L231 Difference]: Finished difference. Result has 188 places, 150 transitions, 1308 flow [2024-06-21 17:12:11,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1308, PETRI_PLACES=188, PETRI_TRANSITIONS=150} [2024-06-21 17:12:11,724 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 17:12:11,724 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 150 transitions, 1308 flow [2024-06-21 17:12:11,724 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) [2024-06-21 17:12:11,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:11,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:11,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:12:11,724 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:11,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -808832565, now seen corresponding path program 10 times [2024-06-21 17:12:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:11,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128069353] [2024-06-21 17:12:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:13,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:13,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128069353] [2024-06-21 17:12:13,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128069353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:13,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:13,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:13,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90689583] [2024-06-21 17:12:13,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:13,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:13,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:13,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:13,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:13,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:13,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 150 transitions, 1308 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) [2024-06-21 17:12:13,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:13,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:13,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:13,412 INFO L124 PetriNetUnfolderBase]: 308/620 cut-off events. [2024-06-21 17:12:13,413 INFO L125 PetriNetUnfolderBase]: For 20392/20392 co-relation queries the response was YES. [2024-06-21 17:12:13,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 620 events. 308/620 cut-off events. For 20392/20392 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3253 event pairs, 39 based on Foata normal form. 1/617 useless extension candidates. Maximal degree in co-relation 3182. Up to 421 conditions per place. [2024-06-21 17:12:13,419 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-21 17:12:13,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 166 transitions, 1892 flow [2024-06-21 17:12:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 17:12:13,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 17:12:13,422 INFO L175 Difference]: Start difference. First operand has 188 places, 150 transitions, 1308 flow. Second operand 10 states and 135 transitions. [2024-06-21 17:12:13,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 166 transitions, 1892 flow [2024-06-21 17:12:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 166 transitions, 1749 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:13,469 INFO L231 Difference]: Finished difference. Result has 191 places, 156 transitions, 1455 flow [2024-06-21 17:12:13,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1455, PETRI_PLACES=191, PETRI_TRANSITIONS=156} [2024-06-21 17:12:13,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-21 17:12:13,470 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 156 transitions, 1455 flow [2024-06-21 17:12:13,470 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) [2024-06-21 17:12:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:13,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:12:13,470 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:13,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -653653013, now seen corresponding path program 11 times [2024-06-21 17:12:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693659830] [2024-06-21 17:12:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693659830] [2024-06-21 17:12:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693659830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:14,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883142492] [2024-06-21 17:12:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:14,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:14,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:14,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 156 transitions, 1455 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) [2024-06-21 17:12:14,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:14,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:14,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:15,284 INFO L124 PetriNetUnfolderBase]: 306/619 cut-off events. [2024-06-21 17:12:15,285 INFO L125 PetriNetUnfolderBase]: For 19325/19325 co-relation queries the response was YES. [2024-06-21 17:12:15,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3244 conditions, 619 events. 306/619 cut-off events. For 19325/19325 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3237 event pairs, 36 based on Foata normal form. 1/618 useless extension candidates. Maximal degree in co-relation 3153. Up to 453 conditions per place. [2024-06-21 17:12:15,289 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-21 17:12:15,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 165 transitions, 1797 flow [2024-06-21 17:12:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 17:12:15,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 17:12:15,291 INFO L175 Difference]: Start difference. First operand has 191 places, 156 transitions, 1455 flow. Second operand 10 states and 131 transitions. [2024-06-21 17:12:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 165 transitions, 1797 flow [2024-06-21 17:12:15,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 165 transitions, 1661 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 17:12:15,351 INFO L231 Difference]: Finished difference. Result has 196 places, 156 transitions, 1426 flow [2024-06-21 17:12:15,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1426, PETRI_PLACES=196, PETRI_TRANSITIONS=156} [2024-06-21 17:12:15,351 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 17:12:15,351 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 156 transitions, 1426 flow [2024-06-21 17:12:15,351 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) [2024-06-21 17:12:15,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:15,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:12:15,352 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:15,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1746710369, now seen corresponding path program 1 times [2024-06-21 17:12:15,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:15,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960631595] [2024-06-21 17:12:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:16,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:16,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960631595] [2024-06-21 17:12:16,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960631595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:16,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:16,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070859362] [2024-06-21 17:12:16,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:16,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:16,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:16,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 156 transitions, 1426 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) [2024-06-21 17:12:16,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:16,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:16,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:16,865 INFO L124 PetriNetUnfolderBase]: 310/629 cut-off events. [2024-06-21 17:12:16,865 INFO L125 PetriNetUnfolderBase]: For 21223/21223 co-relation queries the response was YES. [2024-06-21 17:12:16,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3290 conditions, 629 events. 310/629 cut-off events. For 21223/21223 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3315 event pairs, 39 based on Foata normal form. 2/630 useless extension candidates. Maximal degree in co-relation 3197. Up to 512 conditions per place. [2024-06-21 17:12:16,870 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 136 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2024-06-21 17:12:16,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 169 transitions, 1798 flow [2024-06-21 17:12:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 17:12:16,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:12:16,874 INFO L175 Difference]: Start difference. First operand has 196 places, 156 transitions, 1426 flow. Second operand 10 states and 130 transitions. [2024-06-21 17:12:16,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 169 transitions, 1798 flow [2024-06-21 17:12:16,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 169 transitions, 1684 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:16,939 INFO L231 Difference]: Finished difference. Result has 197 places, 157 transitions, 1390 flow [2024-06-21 17:12:16,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1390, PETRI_PLACES=197, PETRI_TRANSITIONS=157} [2024-06-21 17:12:16,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 17:12:16,940 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 157 transitions, 1390 flow [2024-06-21 17:12:16,940 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) [2024-06-21 17:12:16,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:16,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:12:16,940 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:16,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2042538625, now seen corresponding path program 2 times [2024-06-21 17:12:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:16,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632356180] [2024-06-21 17:12:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:16,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:18,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:18,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632356180] [2024-06-21 17:12:18,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632356180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:18,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:18,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225907088] [2024-06-21 17:12:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:18,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:18,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:18,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:18,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 157 transitions, 1390 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) [2024-06-21 17:12:18,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:18,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:18,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:18,448 INFO L124 PetriNetUnfolderBase]: 322/657 cut-off events. [2024-06-21 17:12:18,448 INFO L125 PetriNetUnfolderBase]: For 31425/31425 co-relation queries the response was YES. [2024-06-21 17:12:18,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 657 events. 322/657 cut-off events. For 31425/31425 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3473 event pairs, 39 based on Foata normal form. 8/664 useless extension candidates. Maximal degree in co-relation 3290. Up to 528 conditions per place. [2024-06-21 17:12:18,453 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 141 selfloop transitions, 15 changer transitions 13/173 dead transitions. [2024-06-21 17:12:18,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 173 transitions, 1798 flow [2024-06-21 17:12:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 17:12:18,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 17:12:18,455 INFO L175 Difference]: Start difference. First operand has 197 places, 157 transitions, 1390 flow. Second operand 10 states and 127 transitions. [2024-06-21 17:12:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 173 transitions, 1798 flow [2024-06-21 17:12:18,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 173 transitions, 1730 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:18,508 INFO L231 Difference]: Finished difference. Result has 199 places, 152 transitions, 1279 flow [2024-06-21 17:12:18,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1279, PETRI_PLACES=199, PETRI_TRANSITIONS=152} [2024-06-21 17:12:18,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 17:12:18,508 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 152 transitions, 1279 flow [2024-06-21 17:12:18,508 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) [2024-06-21 17:12:18,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:18,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:18,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:12:18,509 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:18,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1870932991, now seen corresponding path program 3 times [2024-06-21 17:12:18,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:18,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64809308] [2024-06-21 17:12:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:19,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:19,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64809308] [2024-06-21 17:12:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64809308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:19,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:19,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854858329] [2024-06-21 17:12:19,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:19,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:19,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:19,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:19,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 152 transitions, 1279 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) [2024-06-21 17:12:19,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:19,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:19,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:19,719 INFO L124 PetriNetUnfolderBase]: 312/639 cut-off events. [2024-06-21 17:12:19,720 INFO L125 PetriNetUnfolderBase]: For 32142/32142 co-relation queries the response was YES. [2024-06-21 17:12:19,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 639 events. 312/639 cut-off events. For 32142/32142 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3342 event pairs, 33 based on Foata normal form. 8/646 useless extension candidates. Maximal degree in co-relation 3136. Up to 508 conditions per place. [2024-06-21 17:12:19,724 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 138 selfloop transitions, 12 changer transitions 15/169 dead transitions. [2024-06-21 17:12:19,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 169 transitions, 1681 flow [2024-06-21 17:12:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 17:12:19,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 17:12:19,725 INFO L175 Difference]: Start difference. First operand has 199 places, 152 transitions, 1279 flow. Second operand 10 states and 127 transitions. [2024-06-21 17:12:19,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 169 transitions, 1681 flow [2024-06-21 17:12:19,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 169 transitions, 1643 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:19,784 INFO L231 Difference]: Finished difference. Result has 195 places, 147 transitions, 1230 flow [2024-06-21 17:12:19,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1230, PETRI_PLACES=195, PETRI_TRANSITIONS=147} [2024-06-21 17:12:19,785 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-21 17:12:19,785 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 147 transitions, 1230 flow [2024-06-21 17:12:19,785 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) [2024-06-21 17:12:19,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:19,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:19,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:12:19,785 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:19,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -536062141, now seen corresponding path program 4 times [2024-06-21 17:12:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:19,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472856033] [2024-06-21 17:12:19,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:19,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:20,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:20,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472856033] [2024-06-21 17:12:20,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472856033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:20,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:20,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:20,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604545244] [2024-06-21 17:12:20,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:20,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:20,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:20,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:20,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:20,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 147 transitions, 1230 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) [2024-06-21 17:12:20,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:20,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:20,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:21,225 INFO L124 PetriNetUnfolderBase]: 351/709 cut-off events. [2024-06-21 17:12:21,225 INFO L125 PetriNetUnfolderBase]: For 39325/39325 co-relation queries the response was YES. [2024-06-21 17:12:21,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4202 conditions, 709 events. 351/709 cut-off events. For 39325/39325 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3757 event pairs, 47 based on Foata normal form. 2/709 useless extension candidates. Maximal degree in co-relation 4109. Up to 528 conditions per place. [2024-06-21 17:12:21,230 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 148 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2024-06-21 17:12:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 183 transitions, 1974 flow [2024-06-21 17:12:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 17:12:21,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 17:12:21,231 INFO L175 Difference]: Start difference. First operand has 195 places, 147 transitions, 1230 flow. Second operand 11 states and 144 transitions. [2024-06-21 17:12:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 183 transitions, 1974 flow [2024-06-21 17:12:21,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 183 transitions, 1938 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:21,307 INFO L231 Difference]: Finished difference. Result has 194 places, 165 transitions, 1491 flow [2024-06-21 17:12:21,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1491, PETRI_PLACES=194, PETRI_TRANSITIONS=165} [2024-06-21 17:12:21,308 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-21 17:12:21,308 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 165 transitions, 1491 flow [2024-06-21 17:12:21,308 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) [2024-06-21 17:12:21,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:21,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:21,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:12:21,309 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:21,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1294116097, now seen corresponding path program 5 times [2024-06-21 17:12:21,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:21,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609898287] [2024-06-21 17:12:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:21,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:22,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:22,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609898287] [2024-06-21 17:12:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609898287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:22,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:22,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277987764] [2024-06-21 17:12:22,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:22,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:22,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:22,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 165 transitions, 1491 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) [2024-06-21 17:12:22,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:22,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:22,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:22,876 INFO L124 PetriNetUnfolderBase]: 354/723 cut-off events. [2024-06-21 17:12:22,876 INFO L125 PetriNetUnfolderBase]: For 50477/50477 co-relation queries the response was YES. [2024-06-21 17:12:22,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3824 conditions, 723 events. 354/723 cut-off events. For 50477/50477 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3892 event pairs, 43 based on Foata normal form. 20/742 useless extension candidates. Maximal degree in co-relation 3730. Up to 514 conditions per place. [2024-06-21 17:12:22,881 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 131 selfloop transitions, 37 changer transitions 9/181 dead transitions. [2024-06-21 17:12:22,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 181 transitions, 1951 flow [2024-06-21 17:12:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 17:12:22,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 17:12:22,882 INFO L175 Difference]: Start difference. First operand has 194 places, 165 transitions, 1491 flow. Second operand 10 states and 132 transitions. [2024-06-21 17:12:22,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 181 transitions, 1951 flow [2024-06-21 17:12:22,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 181 transitions, 1902 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:22,944 INFO L231 Difference]: Finished difference. Result has 198 places, 160 transitions, 1480 flow [2024-06-21 17:12:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1480, PETRI_PLACES=198, PETRI_TRANSITIONS=160} [2024-06-21 17:12:22,944 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2024-06-21 17:12:22,944 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 160 transitions, 1480 flow [2024-06-21 17:12:22,945 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) [2024-06-21 17:12:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:22,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:12:22,945 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:22,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash 686978653, now seen corresponding path program 6 times [2024-06-21 17:12:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:22,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361188517] [2024-06-21 17:12:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:23,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:23,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361188517] [2024-06-21 17:12:23,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361188517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:23,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:23,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:23,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513751129] [2024-06-21 17:12:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:23,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:23,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:23,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:23,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 160 transitions, 1480 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) [2024-06-21 17:12:23,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:23,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:24,177 INFO L124 PetriNetUnfolderBase]: 332/677 cut-off events. [2024-06-21 17:12:24,178 INFO L125 PetriNetUnfolderBase]: For 31075/31075 co-relation queries the response was YES. [2024-06-21 17:12:24,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3586 conditions, 677 events. 332/677 cut-off events. For 31075/31075 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3567 event pairs, 21 based on Foata normal form. 8/684 useless extension candidates. Maximal degree in co-relation 3491. Up to 506 conditions per place. [2024-06-21 17:12:24,185 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 143 selfloop transitions, 12 changer transitions 21/180 dead transitions. [2024-06-21 17:12:24,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 180 transitions, 1916 flow [2024-06-21 17:12:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 17:12:24,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:12:24,186 INFO L175 Difference]: Start difference. First operand has 198 places, 160 transitions, 1480 flow. Second operand 10 states and 130 transitions. [2024-06-21 17:12:24,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 180 transitions, 1916 flow [2024-06-21 17:12:24,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 180 transitions, 1777 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:24,247 INFO L231 Difference]: Finished difference. Result has 197 places, 152 transitions, 1311 flow [2024-06-21 17:12:24,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1311, PETRI_PLACES=197, PETRI_TRANSITIONS=152} [2024-06-21 17:12:24,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 17:12:24,248 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 152 transitions, 1311 flow [2024-06-21 17:12:24,248 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) [2024-06-21 17:12:24,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:24,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:24,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:12:24,249 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:24,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash -857688483, now seen corresponding path program 7 times [2024-06-21 17:12:24,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:24,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169290347] [2024-06-21 17:12:24,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:24,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169290347] [2024-06-21 17:12:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169290347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:25,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:25,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171420891] [2024-06-21 17:12:25,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:25,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:25,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:25,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 152 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) [2024-06-21 17:12:25,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:25,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:25,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:26,096 INFO L124 PetriNetUnfolderBase]: 304/625 cut-off events. [2024-06-21 17:12:26,096 INFO L125 PetriNetUnfolderBase]: For 35141/35141 co-relation queries the response was YES. [2024-06-21 17:12:26,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3307 conditions, 625 events. 304/625 cut-off events. For 35141/35141 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3249 event pairs, 29 based on Foata normal form. 10/634 useless extension candidates. Maximal degree in co-relation 3225. Up to 486 conditions per place. [2024-06-21 17:12:26,101 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 137 selfloop transitions, 15 changer transitions 12/168 dead transitions. [2024-06-21 17:12:26,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 168 transitions, 1747 flow [2024-06-21 17:12:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 17:12:26,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 17:12:26,102 INFO L175 Difference]: Start difference. First operand has 197 places, 152 transitions, 1311 flow. Second operand 10 states and 128 transitions. [2024-06-21 17:12:26,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 168 transitions, 1747 flow [2024-06-21 17:12:26,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 168 transitions, 1700 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 17:12:26,158 INFO L231 Difference]: Finished difference. Result has 186 places, 147 transitions, 1255 flow [2024-06-21 17:12:26,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1255, PETRI_PLACES=186, PETRI_TRANSITIONS=147} [2024-06-21 17:12:26,158 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-21 17:12:26,158 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 147 transitions, 1255 flow [2024-06-21 17:12:26,159 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) [2024-06-21 17:12:26,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:26,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:12:26,159 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:26,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1810532831, now seen corresponding path program 8 times [2024-06-21 17:12:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:26,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854020579] [2024-06-21 17:12:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:27,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:27,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854020579] [2024-06-21 17:12:27,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854020579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:27,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:27,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:27,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738266899] [2024-06-21 17:12:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:27,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:27,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:27,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:27,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:27,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 147 transitions, 1255 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) [2024-06-21 17:12:27,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:27,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:27,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:27,427 INFO L124 PetriNetUnfolderBase]: 292/605 cut-off events. [2024-06-21 17:12:27,427 INFO L125 PetriNetUnfolderBase]: For 28012/28012 co-relation queries the response was YES. [2024-06-21 17:12:27,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3120 conditions, 605 events. 292/605 cut-off events. For 28012/28012 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3107 event pairs, 23 based on Foata normal form. 8/612 useless extension candidates. Maximal degree in co-relation 3044. Up to 476 conditions per place. [2024-06-21 17:12:27,431 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 135 selfloop transitions, 13 changer transitions 11/163 dead transitions. [2024-06-21 17:12:27,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 163 transitions, 1647 flow [2024-06-21 17:12:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 17:12:27,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:12:27,432 INFO L175 Difference]: Start difference. First operand has 186 places, 147 transitions, 1255 flow. Second operand 10 states and 125 transitions. [2024-06-21 17:12:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 163 transitions, 1647 flow [2024-06-21 17:12:27,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 163 transitions, 1579 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:12:27,489 INFO L231 Difference]: Finished difference. Result has 183 places, 144 transitions, 1201 flow [2024-06-21 17:12:27,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1201, PETRI_PLACES=183, PETRI_TRANSITIONS=144} [2024-06-21 17:12:27,490 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-21 17:12:27,490 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 144 transitions, 1201 flow [2024-06-21 17:12:27,490 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) [2024-06-21 17:12:27,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:27,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:27,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:12:27,490 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:27,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:27,491 INFO L85 PathProgramCache]: Analyzing trace with hash -862450083, now seen corresponding path program 9 times [2024-06-21 17:12:27,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078010242] [2024-06-21 17:12:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:27,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:28,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:28,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078010242] [2024-06-21 17:12:28,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078010242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:28,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:28,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:28,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107918652] [2024-06-21 17:12:28,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:28,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:28,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:28,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:28,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 144 transitions, 1201 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) [2024-06-21 17:12:28,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:28,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:28,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:28,874 INFO L124 PetriNetUnfolderBase]: 285/592 cut-off events. [2024-06-21 17:12:28,874 INFO L125 PetriNetUnfolderBase]: For 27584/27584 co-relation queries the response was YES. [2024-06-21 17:12:28,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 592 events. 285/592 cut-off events. For 27584/27584 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3037 event pairs, 21 based on Foata normal form. 8/599 useless extension candidates. Maximal degree in co-relation 2962. Up to 458 conditions per place. [2024-06-21 17:12:28,879 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 128 selfloop transitions, 7 changer transitions 22/161 dead transitions. [2024-06-21 17:12:28,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 161 transitions, 1589 flow [2024-06-21 17:12:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 17:12:28,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:12:28,881 INFO L175 Difference]: Start difference. First operand has 183 places, 144 transitions, 1201 flow. Second operand 10 states and 125 transitions. [2024-06-21 17:12:28,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 161 transitions, 1589 flow [2024-06-21 17:12:28,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 161 transitions, 1525 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 17:12:28,922 INFO L231 Difference]: Finished difference. Result has 178 places, 135 transitions, 1098 flow [2024-06-21 17:12:28,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1098, PETRI_PLACES=178, PETRI_TRANSITIONS=135} [2024-06-21 17:12:28,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 17:12:28,922 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 135 transitions, 1098 flow [2024-06-21 17:12:28,922 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) [2024-06-21 17:12:28,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:28,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:28,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:12:28,923 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:28,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash 416789151, now seen corresponding path program 1 times [2024-06-21 17:12:28,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:28,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820637254] [2024-06-21 17:12:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:28,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:30,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:30,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820637254] [2024-06-21 17:12:30,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820637254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:30,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:30,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:30,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573567118] [2024-06-21 17:12:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:30,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:30,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:30,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:30,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:30,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:30,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 135 transitions, 1098 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) [2024-06-21 17:12:30,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:30,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:30,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:30,707 INFO L124 PetriNetUnfolderBase]: 266/553 cut-off events. [2024-06-21 17:12:30,707 INFO L125 PetriNetUnfolderBase]: For 26466/26470 co-relation queries the response was YES. [2024-06-21 17:12:30,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 553 events. 266/553 cut-off events. For 26466/26470 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2792 event pairs, 25 based on Foata normal form. 8/560 useless extension candidates. Maximal degree in co-relation 2749. Up to 384 conditions per place. [2024-06-21 17:12:30,711 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 30 changer transitions 10/149 dead transitions. [2024-06-21 17:12:30,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 149 transitions, 1466 flow [2024-06-21 17:12:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 17:12:30,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 17:12:30,712 INFO L175 Difference]: Start difference. First operand has 178 places, 135 transitions, 1098 flow. Second operand 11 states and 138 transitions. [2024-06-21 17:12:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 149 transitions, 1466 flow [2024-06-21 17:12:30,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 149 transitions, 1437 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:30,746 INFO L231 Difference]: Finished difference. Result has 170 places, 129 transitions, 1083 flow [2024-06-21 17:12:30,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1083, PETRI_PLACES=170, PETRI_TRANSITIONS=129} [2024-06-21 17:12:30,746 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-21 17:12:30,746 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 129 transitions, 1083 flow [2024-06-21 17:12:30,747 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) [2024-06-21 17:12:30,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:30,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:30,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:12:30,747 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:30,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:30,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1881399581, now seen corresponding path program 2 times [2024-06-21 17:12:30,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:30,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531932234] [2024-06-21 17:12:30,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:30,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:31,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:31,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531932234] [2024-06-21 17:12:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531932234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:31,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845091821] [2024-06-21 17:12:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:31,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:31,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:31,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 129 transitions, 1083 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) [2024-06-21 17:12:31,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:31,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:31,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:32,205 INFO L124 PetriNetUnfolderBase]: 274/577 cut-off events. [2024-06-21 17:12:32,205 INFO L125 PetriNetUnfolderBase]: For 30585/30589 co-relation queries the response was YES. [2024-06-21 17:12:32,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 577 events. 274/577 cut-off events. For 30585/30589 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2974 event pairs, 33 based on Foata normal form. 6/582 useless extension candidates. Maximal degree in co-relation 3268. Up to 336 conditions per place. [2024-06-21 17:12:32,208 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 111 selfloop transitions, 24 changer transitions 8/147 dead transitions. [2024-06-21 17:12:32,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 147 transitions, 1581 flow [2024-06-21 17:12:32,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 17:12:32,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 17:12:32,209 INFO L175 Difference]: Start difference. First operand has 170 places, 129 transitions, 1083 flow. Second operand 11 states and 139 transitions. [2024-06-21 17:12:32,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 147 transitions, 1581 flow [2024-06-21 17:12:32,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 147 transitions, 1509 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:32,257 INFO L231 Difference]: Finished difference. Result has 168 places, 125 transitions, 1032 flow [2024-06-21 17:12:32,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1032, PETRI_PLACES=168, PETRI_TRANSITIONS=125} [2024-06-21 17:12:32,258 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-21 17:12:32,258 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 125 transitions, 1032 flow [2024-06-21 17:12:32,258 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) [2024-06-21 17:12:32,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:32,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:32,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:12:32,259 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:32,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash -307976417, now seen corresponding path program 3 times [2024-06-21 17:12:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:32,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8003458] [2024-06-21 17:12:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:33,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8003458] [2024-06-21 17:12:33,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8003458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:33,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:33,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:33,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911991521] [2024-06-21 17:12:33,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:33,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:33,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:33,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:33,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:33,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 125 transitions, 1032 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) [2024-06-21 17:12:33,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:33,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:33,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:34,303 INFO L124 PetriNetUnfolderBase]: 261/550 cut-off events. [2024-06-21 17:12:34,303 INFO L125 PetriNetUnfolderBase]: For 29755/29759 co-relation queries the response was YES. [2024-06-21 17:12:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 550 events. 261/550 cut-off events. For 29755/29759 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2811 event pairs, 38 based on Foata normal form. 8/557 useless extension candidates. Maximal degree in co-relation 2992. Up to 389 conditions per place. [2024-06-21 17:12:34,306 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 14 changer transitions 21/139 dead transitions. [2024-06-21 17:12:34,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 139 transitions, 1378 flow [2024-06-21 17:12:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 17:12:34,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 17:12:34,307 INFO L175 Difference]: Start difference. First operand has 168 places, 125 transitions, 1032 flow. Second operand 11 states and 135 transitions. [2024-06-21 17:12:34,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 139 transitions, 1378 flow [2024-06-21 17:12:34,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 139 transitions, 1321 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 17:12:34,361 INFO L231 Difference]: Finished difference. Result has 165 places, 111 transitions, 874 flow [2024-06-21 17:12:34,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=874, PETRI_PLACES=165, PETRI_TRANSITIONS=111} [2024-06-21 17:12:34,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-21 17:12:34,362 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 111 transitions, 874 flow [2024-06-21 17:12:34,362 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) [2024-06-21 17:12:34,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:34,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:34,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:12:34,362 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:34,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1439488095, now seen corresponding path program 10 times [2024-06-21 17:12:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:34,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586367139] [2024-06-21 17:12:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:35,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:35,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586367139] [2024-06-21 17:12:35,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586367139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:35,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:35,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046714476] [2024-06-21 17:12:35,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:35,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:35,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 111 transitions, 874 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) [2024-06-21 17:12:35,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:35,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:35,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:35,635 INFO L124 PetriNetUnfolderBase]: 239/506 cut-off events. [2024-06-21 17:12:35,635 INFO L125 PetriNetUnfolderBase]: For 30950/30954 co-relation queries the response was YES. [2024-06-21 17:12:35,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2835 conditions, 506 events. 239/506 cut-off events. For 30950/30954 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2491 event pairs, 41 based on Foata normal form. 14/519 useless extension candidates. Maximal degree in co-relation 2768. Up to 291 conditions per place. [2024-06-21 17:12:35,638 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 61 selfloop transitions, 52 changer transitions 6/123 dead transitions. [2024-06-21 17:12:35,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 123 transitions, 1198 flow [2024-06-21 17:12:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 17:12:35,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 17:12:35,639 INFO L175 Difference]: Start difference. First operand has 165 places, 111 transitions, 874 flow. Second operand 10 states and 134 transitions. [2024-06-21 17:12:35,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 123 transitions, 1198 flow [2024-06-21 17:12:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 123 transitions, 1120 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-06-21 17:12:35,684 INFO L231 Difference]: Finished difference. Result has 152 places, 109 transitions, 915 flow [2024-06-21 17:12:35,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=152, PETRI_TRANSITIONS=109} [2024-06-21 17:12:35,685 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-21 17:12:35,685 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 109 transitions, 915 flow [2024-06-21 17:12:35,685 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) [2024-06-21 17:12:35,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:35,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:35,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:12:35,685 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:35,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1189505187, now seen corresponding path program 4 times [2024-06-21 17:12:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:35,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350577508] [2024-06-21 17:12:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350577508] [2024-06-21 17:12:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350577508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:37,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533722227] [2024-06-21 17:12:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:37,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:37,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 109 transitions, 915 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) [2024-06-21 17:12:37,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:37,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:37,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:37,965 INFO L124 PetriNetUnfolderBase]: 234/501 cut-off events. [2024-06-21 17:12:37,965 INFO L125 PetriNetUnfolderBase]: For 24077/24081 co-relation queries the response was YES. [2024-06-21 17:12:37,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 501 events. 234/501 cut-off events. For 24077/24081 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2486 event pairs, 43 based on Foata normal form. 12/512 useless extension candidates. Maximal degree in co-relation 2671. Up to 319 conditions per place. [2024-06-21 17:12:37,968 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 68 selfloop transitions, 36 changer transitions 13/121 dead transitions. [2024-06-21 17:12:37,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 121 transitions, 1211 flow [2024-06-21 17:12:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:12:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:12:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 17:12:37,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:12:37,969 INFO L175 Difference]: Start difference. First operand has 152 places, 109 transitions, 915 flow. Second operand 12 states and 150 transitions. [2024-06-21 17:12:37,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 121 transitions, 1211 flow [2024-06-21 17:12:38,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 121 transitions, 1095 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:12:38,008 INFO L231 Difference]: Finished difference. Result has 154 places, 103 transitions, 837 flow [2024-06-21 17:12:38,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=837, PETRI_PLACES=154, PETRI_TRANSITIONS=103} [2024-06-21 17:12:38,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-21 17:12:38,008 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 103 transitions, 837 flow [2024-06-21 17:12:38,009 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) [2024-06-21 17:12:38,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:38,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:12:38,009 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:38,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:38,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1448065919, now seen corresponding path program 5 times [2024-06-21 17:12:38,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:38,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063533177] [2024-06-21 17:12:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:39,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:39,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063533177] [2024-06-21 17:12:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063533177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:39,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:39,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:39,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413432222] [2024-06-21 17:12:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:39,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:39,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:39,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:39,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 103 transitions, 837 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) [2024-06-21 17:12:39,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:39,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:39,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:39,991 INFO L124 PetriNetUnfolderBase]: 240/517 cut-off events. [2024-06-21 17:12:39,991 INFO L125 PetriNetUnfolderBase]: For 29686/29690 co-relation queries the response was YES. [2024-06-21 17:12:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 517 events. 240/517 cut-off events. For 29686/29690 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2593 event pairs, 49 based on Foata normal form. 10/526 useless extension candidates. Maximal degree in co-relation 3053. Up to 299 conditions per place. [2024-06-21 17:12:39,993 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 73 selfloop transitions, 34 changer transitions 8/119 dead transitions. [2024-06-21 17:12:39,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 119 transitions, 1249 flow [2024-06-21 17:12:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 17:12:39,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 17:12:39,994 INFO L175 Difference]: Start difference. First operand has 154 places, 103 transitions, 837 flow. Second operand 11 states and 142 transitions. [2024-06-21 17:12:39,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 119 transitions, 1249 flow [2024-06-21 17:12:40,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 119 transitions, 1163 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:40,033 INFO L231 Difference]: Finished difference. Result has 148 places, 99 transitions, 805 flow [2024-06-21 17:12:40,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=805, PETRI_PLACES=148, PETRI_TRANSITIONS=99} [2024-06-21 17:12:40,034 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-21 17:12:40,034 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 99 transitions, 805 flow [2024-06-21 17:12:40,034 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) [2024-06-21 17:12:40,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:40,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:12:40,035 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:40,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash 551540139, now seen corresponding path program 11 times [2024-06-21 17:12:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:40,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617946013] [2024-06-21 17:12:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617946013] [2024-06-21 17:12:41,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617946013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:41,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:41,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3170602] [2024-06-21 17:12:41,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:41,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:41,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:41,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 99 transitions, 805 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) [2024-06-21 17:12:41,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:41,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:41,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:41,442 INFO L124 PetriNetUnfolderBase]: 228/489 cut-off events. [2024-06-21 17:12:41,442 INFO L125 PetriNetUnfolderBase]: For 23830/23834 co-relation queries the response was YES. [2024-06-21 17:12:41,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 489 events. 228/489 cut-off events. For 23830/23834 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2379 event pairs, 51 based on Foata normal form. 6/494 useless extension candidates. Maximal degree in co-relation 2897. Up to 381 conditions per place. [2024-06-21 17:12:41,445 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 74 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-06-21 17:12:41,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 108 transitions, 1043 flow [2024-06-21 17:12:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 17:12:41,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:12:41,446 INFO L175 Difference]: Start difference. First operand has 148 places, 99 transitions, 805 flow. Second operand 10 states and 125 transitions. [2024-06-21 17:12:41,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 108 transitions, 1043 flow [2024-06-21 17:12:41,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 108 transitions, 971 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:41,487 INFO L231 Difference]: Finished difference. Result has 143 places, 100 transitions, 813 flow [2024-06-21 17:12:41,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=813, PETRI_PLACES=143, PETRI_TRANSITIONS=100} [2024-06-21 17:12:41,488 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 17:12:41,488 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 100 transitions, 813 flow [2024-06-21 17:12:41,488 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) [2024-06-21 17:12:41,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:41,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:41,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:12:41,488 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:41,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash -126906413, now seen corresponding path program 12 times [2024-06-21 17:12:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:41,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251485222] [2024-06-21 17:12:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:42,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251485222] [2024-06-21 17:12:42,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251485222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:42,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:42,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706612576] [2024-06-21 17:12:42,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:42,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:42,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:42,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 100 transitions, 813 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) [2024-06-21 17:12:42,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:42,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:42,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:42,968 INFO L124 PetriNetUnfolderBase]: 232/493 cut-off events. [2024-06-21 17:12:42,968 INFO L125 PetriNetUnfolderBase]: For 21774/21778 co-relation queries the response was YES. [2024-06-21 17:12:42,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 493 events. 232/493 cut-off events. For 21774/21778 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2410 event pairs, 51 based on Foata normal form. 6/498 useless extension candidates. Maximal degree in co-relation 2897. Up to 362 conditions per place. [2024-06-21 17:12:42,970 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 70 selfloop transitions, 35 changer transitions 0/109 dead transitions. [2024-06-21 17:12:42,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 109 transitions, 1055 flow [2024-06-21 17:12:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:42,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 17:12:42,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:12:42,971 INFO L175 Difference]: Start difference. First operand has 143 places, 100 transitions, 813 flow. Second operand 10 states and 125 transitions. [2024-06-21 17:12:42,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 109 transitions, 1055 flow [2024-06-21 17:12:43,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 109 transitions, 985 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:43,009 INFO L231 Difference]: Finished difference. Result has 145 places, 101 transitions, 835 flow [2024-06-21 17:12:43,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=835, PETRI_PLACES=145, PETRI_TRANSITIONS=101} [2024-06-21 17:12:43,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 17:12:43,010 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 101 transitions, 835 flow [2024-06-21 17:12:43,010 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) [2024-06-21 17:12:43,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:43,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:12:43,010 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:43,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1620397317, now seen corresponding path program 13 times [2024-06-21 17:12:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819825614] [2024-06-21 17:12:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:44,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:44,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819825614] [2024-06-21 17:12:44,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819825614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:44,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:44,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487421510] [2024-06-21 17:12:44,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:44,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:44,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:44,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:44,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 101 transitions, 835 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) [2024-06-21 17:12:44,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:44,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:44,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:44,525 INFO L124 PetriNetUnfolderBase]: 243/518 cut-off events. [2024-06-21 17:12:44,525 INFO L125 PetriNetUnfolderBase]: For 24707/24711 co-relation queries the response was YES. [2024-06-21 17:12:44,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 518 events. 243/518 cut-off events. For 24707/24711 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2567 event pairs, 54 based on Foata normal form. 6/523 useless extension candidates. Maximal degree in co-relation 3127. Up to 399 conditions per place. [2024-06-21 17:12:44,528 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-21 17:12:44,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 113 transitions, 1191 flow [2024-06-21 17:12:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 17:12:44,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 17:12:44,530 INFO L175 Difference]: Start difference. First operand has 145 places, 101 transitions, 835 flow. Second operand 10 states and 125 transitions. [2024-06-21 17:12:44,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 113 transitions, 1191 flow [2024-06-21 17:12:44,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 113 transitions, 1109 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 17:12:44,567 INFO L231 Difference]: Finished difference. Result has 147 places, 103 transitions, 845 flow [2024-06-21 17:12:44,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=845, PETRI_PLACES=147, PETRI_TRANSITIONS=103} [2024-06-21 17:12:44,568 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 17:12:44,568 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 103 transitions, 845 flow [2024-06-21 17:12:44,568 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) [2024-06-21 17:12:44,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:44,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:44,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:12:44,568 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:44,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash -127084043, now seen corresponding path program 14 times [2024-06-21 17:12:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:44,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134697490] [2024-06-21 17:12:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:45,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:45,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134697490] [2024-06-21 17:12:45,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134697490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:45,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:45,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:45,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191029788] [2024-06-21 17:12:45,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:45,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:45,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:45,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 103 transitions, 845 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) [2024-06-21 17:12:45,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:45,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:45,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:46,248 INFO L124 PetriNetUnfolderBase]: 254/539 cut-off events. [2024-06-21 17:12:46,249 INFO L125 PetriNetUnfolderBase]: For 27828/27832 co-relation queries the response was YES. [2024-06-21 17:12:46,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3399 conditions, 539 events. 254/539 cut-off events. For 27828/27832 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2699 event pairs, 57 based on Foata normal form. 6/544 useless extension candidates. Maximal degree in co-relation 3341. Up to 381 conditions per place. [2024-06-21 17:12:46,252 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 37 changer transitions 0/115 dead transitions. [2024-06-21 17:12:46,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 115 transitions, 1211 flow [2024-06-21 17:12:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 17:12:46,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 17:12:46,253 INFO L175 Difference]: Start difference. First operand has 147 places, 103 transitions, 845 flow. Second operand 10 states and 127 transitions. [2024-06-21 17:12:46,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 115 transitions, 1211 flow [2024-06-21 17:12:46,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 115 transitions, 1161 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:46,301 INFO L231 Difference]: Finished difference. Result has 151 places, 105 transitions, 915 flow [2024-06-21 17:12:46,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=915, PETRI_PLACES=151, PETRI_TRANSITIONS=105} [2024-06-21 17:12:46,301 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-21 17:12:46,301 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 105 transitions, 915 flow [2024-06-21 17:12:46,301 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) [2024-06-21 17:12:46,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:46,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:46,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:12:46,302 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:46,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1211593889, now seen corresponding path program 6 times [2024-06-21 17:12:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:46,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452953317] [2024-06-21 17:12:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:46,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452953317] [2024-06-21 17:12:48,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452953317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:48,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:48,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:48,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152435757] [2024-06-21 17:12:48,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:48,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:48,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:48,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 105 transitions, 915 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) [2024-06-21 17:12:48,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:48,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:48,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:48,664 INFO L124 PetriNetUnfolderBase]: 244/517 cut-off events. [2024-06-21 17:12:48,664 INFO L125 PetriNetUnfolderBase]: For 27233/27237 co-relation queries the response was YES. [2024-06-21 17:12:48,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 517 events. 244/517 cut-off events. For 27233/27237 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2589 event pairs, 49 based on Foata normal form. 12/528 useless extension candidates. Maximal degree in co-relation 2977. Up to 321 conditions per place. [2024-06-21 17:12:48,667 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 58 selfloop transitions, 48 changer transitions 7/117 dead transitions. [2024-06-21 17:12:48,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 117 transitions, 1203 flow [2024-06-21 17:12:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 17:12:48,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:12:48,668 INFO L175 Difference]: Start difference. First operand has 151 places, 105 transitions, 915 flow. Second operand 11 states and 143 transitions. [2024-06-21 17:12:48,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 117 transitions, 1203 flow [2024-06-21 17:12:48,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 117 transitions, 1133 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:12:48,709 INFO L231 Difference]: Finished difference. Result has 156 places, 102 transitions, 925 flow [2024-06-21 17:12:48,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=925, PETRI_PLACES=156, PETRI_TRANSITIONS=102} [2024-06-21 17:12:48,709 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-21 17:12:48,709 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 102 transitions, 925 flow [2024-06-21 17:12:48,710 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) [2024-06-21 17:12:48,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:48,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:48,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:12:48,710 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:48,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 542556221, now seen corresponding path program 15 times [2024-06-21 17:12:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:48,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498620346] [2024-06-21 17:12:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:49,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:49,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498620346] [2024-06-21 17:12:49,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498620346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:49,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:49,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104137457] [2024-06-21 17:12:49,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:49,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:49,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:49,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 102 transitions, 925 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) [2024-06-21 17:12:49,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:49,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:50,259 INFO L124 PetriNetUnfolderBase]: 236/507 cut-off events. [2024-06-21 17:12:50,260 INFO L125 PetriNetUnfolderBase]: For 28195/28199 co-relation queries the response was YES. [2024-06-21 17:12:50,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2935 conditions, 507 events. 236/507 cut-off events. For 28195/28199 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2536 event pairs, 53 based on Foata normal form. 10/516 useless extension candidates. Maximal degree in co-relation 2873. Up to 388 conditions per place. [2024-06-21 17:12:50,263 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 20 changer transitions 9/115 dead transitions. [2024-06-21 17:12:50,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 115 transitions, 1213 flow [2024-06-21 17:12:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 17:12:50,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 17:12:50,264 INFO L175 Difference]: Start difference. First operand has 156 places, 102 transitions, 925 flow. Second operand 10 states and 130 transitions. [2024-06-21 17:12:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 115 transitions, 1213 flow [2024-06-21 17:12:50,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 115 transitions, 1097 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:50,304 INFO L231 Difference]: Finished difference. Result has 152 places, 96 transitions, 816 flow [2024-06-21 17:12:50,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=816, PETRI_PLACES=152, PETRI_TRANSITIONS=96} [2024-06-21 17:12:50,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 122 predicate places. [2024-06-21 17:12:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 96 transitions, 816 flow [2024-06-21 17:12:50,305 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) [2024-06-21 17:12:50,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:50,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:50,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:12:50,306 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:50,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 551720063, now seen corresponding path program 7 times [2024-06-21 17:12:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:50,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110992196] [2024-06-21 17:12:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:50,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:51,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:51,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110992196] [2024-06-21 17:12:51,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110992196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:51,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:51,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720162874] [2024-06-21 17:12:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:51,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:51,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:51,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:51,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:51,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 96 transitions, 816 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) [2024-06-21 17:12:51,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:51,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:51,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:52,428 INFO L124 PetriNetUnfolderBase]: 226/489 cut-off events. [2024-06-21 17:12:52,428 INFO L125 PetriNetUnfolderBase]: For 24882/24886 co-relation queries the response was YES. [2024-06-21 17:12:52,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 489 events. 226/489 cut-off events. For 24882/24886 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2430 event pairs, 50 based on Foata normal form. 12/500 useless extension candidates. Maximal degree in co-relation 2702. Up to 351 conditions per place. [2024-06-21 17:12:52,431 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 67 selfloop transitions, 24 changer transitions 13/108 dead transitions. [2024-06-21 17:12:52,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 108 transitions, 1084 flow [2024-06-21 17:12:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:52,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 17:12:52,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 17:12:52,432 INFO L175 Difference]: Start difference. First operand has 152 places, 96 transitions, 816 flow. Second operand 11 states and 139 transitions. [2024-06-21 17:12:52,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 108 transitions, 1084 flow [2024-06-21 17:12:52,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 108 transitions, 1004 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 17:12:52,473 INFO L231 Difference]: Finished difference. Result has 150 places, 90 transitions, 748 flow [2024-06-21 17:12:52,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=748, PETRI_PLACES=150, PETRI_TRANSITIONS=90} [2024-06-21 17:12:52,474 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 17:12:52,474 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 90 transitions, 748 flow [2024-06-21 17:12:52,474 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) [2024-06-21 17:12:52,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:52,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:12:52,475 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:52,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2028174173, now seen corresponding path program 8 times [2024-06-21 17:12:52,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:52,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571123773] [2024-06-21 17:12:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:53,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:53,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571123773] [2024-06-21 17:12:53,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571123773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:53,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:53,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:53,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787140678] [2024-06-21 17:12:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:53,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:53,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:53,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:53,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:53,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 90 transitions, 748 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) [2024-06-21 17:12:53,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:53,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:53,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:54,247 INFO L124 PetriNetUnfolderBase]: 232/521 cut-off events. [2024-06-21 17:12:54,247 INFO L125 PetriNetUnfolderBase]: For 31083/31087 co-relation queries the response was YES. [2024-06-21 17:12:54,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 521 events. 232/521 cut-off events. For 31083/31087 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2658 event pairs, 63 based on Foata normal form. 6/526 useless extension candidates. Maximal degree in co-relation 3101. Up to 332 conditions per place. [2024-06-21 17:12:54,250 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 79 selfloop transitions, 18 changer transitions 9/110 dead transitions. [2024-06-21 17:12:54,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 110 transitions, 1146 flow [2024-06-21 17:12:54,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:12:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:12:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 17:12:54,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 17:12:54,251 INFO L175 Difference]: Start difference. First operand has 150 places, 90 transitions, 748 flow. Second operand 12 states and 152 transitions. [2024-06-21 17:12:54,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 110 transitions, 1146 flow [2024-06-21 17:12:54,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 110 transitions, 1078 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:54,292 INFO L231 Difference]: Finished difference. Result has 145 places, 87 transitions, 707 flow [2024-06-21 17:12:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=707, PETRI_PLACES=145, PETRI_TRANSITIONS=87} [2024-06-21 17:12:54,292 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-21 17:12:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 87 transitions, 707 flow [2024-06-21 17:12:54,292 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) [2024-06-21 17:12:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:12:54,293 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1685875583, now seen corresponding path program 9 times [2024-06-21 17:12:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207852593] [2024-06-21 17:12:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:55,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:55,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207852593] [2024-06-21 17:12:55,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207852593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:55,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:55,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:55,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623501759] [2024-06-21 17:12:55,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:55,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:55,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:55,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:55,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:55,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:55,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 87 transitions, 707 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) [2024-06-21 17:12:55,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:55,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:55,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:55,906 INFO L124 PetriNetUnfolderBase]: 222/495 cut-off events. [2024-06-21 17:12:55,906 INFO L125 PetriNetUnfolderBase]: For 27018/27022 co-relation queries the response was YES. [2024-06-21 17:12:55,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2992 conditions, 495 events. 222/495 cut-off events. For 27018/27022 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2469 event pairs, 61 based on Foata normal form. 6/500 useless extension candidates. Maximal degree in co-relation 2934. Up to 392 conditions per place. [2024-06-21 17:12:55,910 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 16 changer transitions 11/102 dead transitions. [2024-06-21 17:12:55,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 102 transitions, 957 flow [2024-06-21 17:12:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:12:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:12:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 17:12:55,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 17:12:55,911 INFO L175 Difference]: Start difference. First operand has 145 places, 87 transitions, 707 flow. Second operand 12 states and 146 transitions. [2024-06-21 17:12:55,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 102 transitions, 957 flow [2024-06-21 17:12:55,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 102 transitions, 919 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 17:12:55,954 INFO L231 Difference]: Finished difference. Result has 142 places, 83 transitions, 673 flow [2024-06-21 17:12:55,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=673, PETRI_PLACES=142, PETRI_TRANSITIONS=83} [2024-06-21 17:12:55,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-21 17:12:55,954 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 83 transitions, 673 flow [2024-06-21 17:12:55,954 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) [2024-06-21 17:12:55,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:55,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:55,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:12:55,955 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:55,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -90323357, now seen corresponding path program 16 times [2024-06-21 17:12:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:55,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979035501] [2024-06-21 17:12:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:57,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:57,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979035501] [2024-06-21 17:12:57,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979035501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:57,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:57,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:12:57,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467834244] [2024-06-21 17:12:57,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:57,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:12:57,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:12:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:12:57,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:57,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 83 transitions, 673 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) [2024-06-21 17:12:57,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:57,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:57,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:57,414 INFO L124 PetriNetUnfolderBase]: 215/478 cut-off events. [2024-06-21 17:12:57,414 INFO L125 PetriNetUnfolderBase]: For 26110/26114 co-relation queries the response was YES. [2024-06-21 17:12:57,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2814 conditions, 478 events. 215/478 cut-off events. For 26110/26114 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2375 event pairs, 61 based on Foata normal form. 14/491 useless extension candidates. Maximal degree in co-relation 2758. Up to 348 conditions per place. [2024-06-21 17:12:57,417 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 62 selfloop transitions, 22 changer transitions 6/94 dead transitions. [2024-06-21 17:12:57,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 94 transitions, 909 flow [2024-06-21 17:12:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:12:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:12:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 17:12:57,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 17:12:57,418 INFO L175 Difference]: Start difference. First operand has 142 places, 83 transitions, 673 flow. Second operand 10 states and 127 transitions. [2024-06-21 17:12:57,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 94 transitions, 909 flow [2024-06-21 17:12:57,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 94 transitions, 855 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 17:12:57,453 INFO L231 Difference]: Finished difference. Result has 135 places, 80 transitions, 651 flow [2024-06-21 17:12:57,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=651, PETRI_PLACES=135, PETRI_TRANSITIONS=80} [2024-06-21 17:12:57,454 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 17:12:57,454 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 651 flow [2024-06-21 17:12:57,454 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) [2024-06-21 17:12:57,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:57,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:12:57,455 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 788192093, now seen corresponding path program 10 times [2024-06-21 17:12:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108305177] [2024-06-21 17:12:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:12:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:12:58,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:12:58,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108305177] [2024-06-21 17:12:58,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108305177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:12:58,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:12:58,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:12:58,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924342661] [2024-06-21 17:12:58,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:12:58,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:12:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:12:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:12:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:12:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:12:58,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 80 transitions, 651 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) [2024-06-21 17:12:58,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:12:58,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:12:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:12:58,957 INFO L124 PetriNetUnfolderBase]: 221/494 cut-off events. [2024-06-21 17:12:58,957 INFO L125 PetriNetUnfolderBase]: For 25899/25903 co-relation queries the response was YES. [2024-06-21 17:12:58,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3013 conditions, 494 events. 221/494 cut-off events. For 25899/25903 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2456 event pairs, 66 based on Foata normal form. 10/503 useless extension candidates. Maximal degree in co-relation 2959. Up to 327 conditions per place. [2024-06-21 17:12:58,959 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 66 selfloop transitions, 19 changer transitions 7/96 dead transitions. [2024-06-21 17:12:58,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 96 transitions, 997 flow [2024-06-21 17:12:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:12:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:12:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 17:12:58,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 17:12:58,960 INFO L175 Difference]: Start difference. First operand has 135 places, 80 transitions, 651 flow. Second operand 11 states and 138 transitions. [2024-06-21 17:12:58,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 96 transitions, 997 flow [2024-06-21 17:12:58,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 96 transitions, 947 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 17:12:58,995 INFO L231 Difference]: Finished difference. Result has 135 places, 77 transitions, 621 flow [2024-06-21 17:12:58,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=621, PETRI_PLACES=135, PETRI_TRANSITIONS=77} [2024-06-21 17:12:58,995 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 17:12:58,995 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 77 transitions, 621 flow [2024-06-21 17:12:58,995 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) [2024-06-21 17:12:58,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:12:58,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:12:58,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:12:58,996 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:12:58,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:12:58,996 INFO L85 PathProgramCache]: Analyzing trace with hash -90316413, now seen corresponding path program 11 times [2024-06-21 17:12:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:12:58,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742680736] [2024-06-21 17:12:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:12:58,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:12:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:00,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:00,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742680736] [2024-06-21 17:13:00,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742680736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:00,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:00,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:00,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848093442] [2024-06-21 17:13:00,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:00,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:00,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:00,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:00,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 77 transitions, 621 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) [2024-06-21 17:13:00,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:00,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:00,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:00,747 INFO L124 PetriNetUnfolderBase]: 196/439 cut-off events. [2024-06-21 17:13:00,747 INFO L125 PetriNetUnfolderBase]: For 21706/21710 co-relation queries the response was YES. [2024-06-21 17:13:00,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 439 events. 196/439 cut-off events. For 21706/21710 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2093 event pairs, 58 based on Foata normal form. 12/450 useless extension candidates. Maximal degree in co-relation 2439. Up to 321 conditions per place. [2024-06-21 17:13:00,750 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 60 selfloop transitions, 18 changer transitions 7/89 dead transitions. [2024-06-21 17:13:00,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 89 transitions, 847 flow [2024-06-21 17:13:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 17:13:00,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 17:13:00,751 INFO L175 Difference]: Start difference. First operand has 135 places, 77 transitions, 621 flow. Second operand 11 states and 134 transitions. [2024-06-21 17:13:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 89 transitions, 847 flow [2024-06-21 17:13:00,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 89 transitions, 789 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 17:13:00,778 INFO L231 Difference]: Finished difference. Result has 131 places, 74 transitions, 584 flow [2024-06-21 17:13:00,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=584, PETRI_PLACES=131, PETRI_TRANSITIONS=74} [2024-06-21 17:13:00,778 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 17:13:00,778 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 74 transitions, 584 flow [2024-06-21 17:13:00,779 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) [2024-06-21 17:13:00,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:00,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:13:00,779 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:00,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:00,779 INFO L85 PathProgramCache]: Analyzing trace with hash -262990877, now seen corresponding path program 17 times [2024-06-21 17:13:00,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:00,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139975216] [2024-06-21 17:13:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:00,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:01,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:01,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139975216] [2024-06-21 17:13:01,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139975216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:01,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:01,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:01,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756622923] [2024-06-21 17:13:01,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:01,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:01,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:01,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:01,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:01,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:01,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 74 transitions, 584 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) [2024-06-21 17:13:01,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:01,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:01,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:01,962 INFO L124 PetriNetUnfolderBase]: 183/412 cut-off events. [2024-06-21 17:13:01,962 INFO L125 PetriNetUnfolderBase]: For 15808/15812 co-relation queries the response was YES. [2024-06-21 17:13:01,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2330 conditions, 412 events. 183/412 cut-off events. For 15808/15812 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1906 event pairs, 54 based on Foata normal form. 6/417 useless extension candidates. Maximal degree in co-relation 2279. Up to 333 conditions per place. [2024-06-21 17:13:01,964 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 64 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-21 17:13:01,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 84 transitions, 782 flow [2024-06-21 17:13:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 17:13:01,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 17:13:01,965 INFO L175 Difference]: Start difference. First operand has 131 places, 74 transitions, 584 flow. Second operand 10 states and 118 transitions. [2024-06-21 17:13:01,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 84 transitions, 782 flow [2024-06-21 17:13:01,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 84 transitions, 738 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 17:13:01,992 INFO L231 Difference]: Finished difference. Result has 127 places, 75 transitions, 598 flow [2024-06-21 17:13:01,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=598, PETRI_PLACES=127, PETRI_TRANSITIONS=75} [2024-06-21 17:13:01,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 17:13:01,993 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 75 transitions, 598 flow [2024-06-21 17:13:01,993 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) [2024-06-21 17:13:01,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:01,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:01,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:13:01,993 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:01,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -430372959, now seen corresponding path program 18 times [2024-06-21 17:13:01,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:01,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508221965] [2024-06-21 17:13:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:01,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:02,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508221965] [2024-06-21 17:13:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508221965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:02,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:02,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949879085] [2024-06-21 17:13:02,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:02,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:02,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:02,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:02,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:02,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 75 transitions, 598 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) [2024-06-21 17:13:02,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:02,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:02,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:03,185 INFO L124 PetriNetUnfolderBase]: 195/440 cut-off events. [2024-06-21 17:13:03,186 INFO L125 PetriNetUnfolderBase]: For 18383/18387 co-relation queries the response was YES. [2024-06-21 17:13:03,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 440 events. 195/440 cut-off events. For 18383/18387 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2091 event pairs, 54 based on Foata normal form. 12/451 useless extension candidates. Maximal degree in co-relation 2355. Up to 332 conditions per place. [2024-06-21 17:13:03,188 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 60 selfloop transitions, 12 changer transitions 12/88 dead transitions. [2024-06-21 17:13:03,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 88 transitions, 820 flow [2024-06-21 17:13:03,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:13:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:13:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 17:13:03,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 17:13:03,189 INFO L175 Difference]: Start difference. First operand has 127 places, 75 transitions, 598 flow. Second operand 10 states and 120 transitions. [2024-06-21 17:13:03,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 88 transitions, 820 flow [2024-06-21 17:13:03,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 88 transitions, 762 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 17:13:03,216 INFO L231 Difference]: Finished difference. Result has 128 places, 72 transitions, 549 flow [2024-06-21 17:13:03,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=549, PETRI_PLACES=128, PETRI_TRANSITIONS=72} [2024-06-21 17:13:03,216 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 17:13:03,216 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 72 transitions, 549 flow [2024-06-21 17:13:03,216 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) [2024-06-21 17:13:03,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:03,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:03,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:13:03,217 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:03,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:03,217 INFO L85 PathProgramCache]: Analyzing trace with hash 551134045, now seen corresponding path program 12 times [2024-06-21 17:13:03,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:03,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55030978] [2024-06-21 17:13:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:04,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:04,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55030978] [2024-06-21 17:13:04,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55030978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:04,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:04,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045444037] [2024-06-21 17:13:04,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:04,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:04,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:04,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 72 transitions, 549 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) [2024-06-21 17:13:04,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:04,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:05,066 INFO L124 PetriNetUnfolderBase]: 181/416 cut-off events. [2024-06-21 17:13:05,066 INFO L125 PetriNetUnfolderBase]: For 18265/18267 co-relation queries the response was YES. [2024-06-21 17:13:05,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2273 conditions, 416 events. 181/416 cut-off events. For 18265/18267 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1977 event pairs, 59 based on Foata normal form. 6/421 useless extension candidates. Maximal degree in co-relation 2223. Up to 277 conditions per place. [2024-06-21 17:13:05,068 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 64 selfloop transitions, 14 changer transitions 7/89 dead transitions. [2024-06-21 17:13:05,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 89 transitions, 853 flow [2024-06-21 17:13:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 17:13:05,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 17:13:05,068 INFO L175 Difference]: Start difference. First operand has 128 places, 72 transitions, 549 flow. Second operand 11 states and 138 transitions. [2024-06-21 17:13:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 89 transitions, 853 flow [2024-06-21 17:13:05,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 89 transitions, 817 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 17:13:05,088 INFO L231 Difference]: Finished difference. Result has 125 places, 69 transitions, 530 flow [2024-06-21 17:13:05,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=530, PETRI_PLACES=125, PETRI_TRANSITIONS=69} [2024-06-21 17:13:05,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-21 17:13:05,088 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 69 transitions, 530 flow [2024-06-21 17:13:05,088 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) [2024-06-21 17:13:05,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:05,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:05,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:13:05,088 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:05,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash -209211011, now seen corresponding path program 13 times [2024-06-21 17:13:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:05,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079839158] [2024-06-21 17:13:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:06,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079839158] [2024-06-21 17:13:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079839158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:06,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:06,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342277651] [2024-06-21 17:13:06,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:06,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:06,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:06,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 69 transitions, 530 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) [2024-06-21 17:13:06,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:06,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:06,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:06,655 INFO L124 PetriNetUnfolderBase]: 164/381 cut-off events. [2024-06-21 17:13:06,655 INFO L125 PetriNetUnfolderBase]: For 16480/16482 co-relation queries the response was YES. [2024-06-21 17:13:06,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 381 events. 164/381 cut-off events. For 16480/16482 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1744 event pairs, 57 based on Foata normal form. 14/394 useless extension candidates. Maximal degree in co-relation 1780. Up to 267 conditions per place. [2024-06-21 17:13:06,657 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 53 selfloop transitions, 8 changer transitions 17/82 dead transitions. [2024-06-21 17:13:06,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 82 transitions, 722 flow [2024-06-21 17:13:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 17:13:06,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 17:13:06,658 INFO L175 Difference]: Start difference. First operand has 125 places, 69 transitions, 530 flow. Second operand 11 states and 134 transitions. [2024-06-21 17:13:06,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 82 transitions, 722 flow [2024-06-21 17:13:06,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 82 transitions, 670 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 17:13:06,671 INFO L231 Difference]: Finished difference. Result has 122 places, 60 transitions, 438 flow [2024-06-21 17:13:06,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=438, PETRI_PLACES=122, PETRI_TRANSITIONS=60} [2024-06-21 17:13:06,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 17:13:06,671 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 60 transitions, 438 flow [2024-06-21 17:13:06,671 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) [2024-06-21 17:13:06,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:06,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:13:06,672 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:06,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -881625179, now seen corresponding path program 19 times [2024-06-21 17:13:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:06,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224990391] [2024-06-21 17:13:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:07,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:07,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224990391] [2024-06-21 17:13:07,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224990391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:07,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:07,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:13:07,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791142896] [2024-06-21 17:13:07,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:07,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:13:07,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:13:07,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:13:07,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:07,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 60 transitions, 438 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) [2024-06-21 17:13:07,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:07,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:07,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:07,886 INFO L124 PetriNetUnfolderBase]: 127/298 cut-off events. [2024-06-21 17:13:07,887 INFO L125 PetriNetUnfolderBase]: For 7793/7795 co-relation queries the response was YES. [2024-06-21 17:13:07,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 298 events. 127/298 cut-off events. For 7793/7795 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1231 event pairs, 34 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1366. Up to 225 conditions per place. [2024-06-21 17:13:07,888 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 55 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-06-21 17:13:07,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 74 transitions, 613 flow [2024-06-21 17:13:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 17:13:07,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 17:13:07,889 INFO L175 Difference]: Start difference. First operand has 122 places, 60 transitions, 438 flow. Second operand 11 states and 131 transitions. [2024-06-21 17:13:07,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 74 transitions, 613 flow [2024-06-21 17:13:07,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 74 transitions, 564 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 17:13:07,899 INFO L231 Difference]: Finished difference. Result has 109 places, 60 transitions, 423 flow [2024-06-21 17:13:07,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=423, PETRI_PLACES=109, PETRI_TRANSITIONS=60} [2024-06-21 17:13:07,899 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 17:13:07,899 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 60 transitions, 423 flow [2024-06-21 17:13:07,900 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) [2024-06-21 17:13:07,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:07,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:07,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:13:07,900 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:07,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1450154412, now seen corresponding path program 1 times [2024-06-21 17:13:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:07,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091029177] [2024-06-21 17:13:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091029177] [2024-06-21 17:13:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091029177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:09,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372606225] [2024-06-21 17:13:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:09,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:09,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:09,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:09,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 60 transitions, 423 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) [2024-06-21 17:13:09,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:09,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:09,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:09,841 INFO L124 PetriNetUnfolderBase]: 120/285 cut-off events. [2024-06-21 17:13:09,841 INFO L125 PetriNetUnfolderBase]: For 5327/5329 co-relation queries the response was YES. [2024-06-21 17:13:09,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 285 events. 120/285 cut-off events. For 5327/5329 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1185 event pairs, 23 based on Foata normal form. 6/290 useless extension candidates. Maximal degree in co-relation 1080. Up to 180 conditions per place. [2024-06-21 17:13:09,843 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 45 selfloop transitions, 13 changer transitions 12/74 dead transitions. [2024-06-21 17:13:09,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 74 transitions, 595 flow [2024-06-21 17:13:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 17:13:09,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 17:13:09,844 INFO L175 Difference]: Start difference. First operand has 109 places, 60 transitions, 423 flow. Second operand 11 states and 130 transitions. [2024-06-21 17:13:09,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 74 transitions, 595 flow [2024-06-21 17:13:09,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 74 transitions, 504 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-21 17:13:09,853 INFO L231 Difference]: Finished difference. Result has 107 places, 55 transitions, 330 flow [2024-06-21 17:13:09,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=330, PETRI_PLACES=107, PETRI_TRANSITIONS=55} [2024-06-21 17:13:09,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 17:13:09,853 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 55 transitions, 330 flow [2024-06-21 17:13:09,854 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) [2024-06-21 17:13:09,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:09,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:09,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:13:09,854 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:09,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:09,855 INFO L85 PathProgramCache]: Analyzing trace with hash 561943594, now seen corresponding path program 2 times [2024-06-21 17:13:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:09,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144571008] [2024-06-21 17:13:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144571008] [2024-06-21 17:13:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144571008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:11,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:11,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766599226] [2024-06-21 17:13:11,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:11,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:11,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:11,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 55 transitions, 330 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) [2024-06-21 17:13:11,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:11,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:11,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:11,751 INFO L124 PetriNetUnfolderBase]: 106/259 cut-off events. [2024-06-21 17:13:11,752 INFO L125 PetriNetUnfolderBase]: For 5507/5509 co-relation queries the response was YES. [2024-06-21 17:13:11,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 259 events. 106/259 cut-off events. For 5507/5509 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1024 event pairs, 19 based on Foata normal form. 6/264 useless extension candidates. Maximal degree in co-relation 873. Up to 144 conditions per place. [2024-06-21 17:13:11,753 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 34 selfloop transitions, 3 changer transitions 29/70 dead transitions. [2024-06-21 17:13:11,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 70 transitions, 496 flow [2024-06-21 17:13:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 17:13:11,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 17:13:11,754 INFO L175 Difference]: Start difference. First operand has 107 places, 55 transitions, 330 flow. Second operand 11 states and 130 transitions. [2024-06-21 17:13:11,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 70 transitions, 496 flow [2024-06-21 17:13:11,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 70 transitions, 456 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 17:13:11,760 INFO L231 Difference]: Finished difference. Result has 100 places, 40 transitions, 224 flow [2024-06-21 17:13:11,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=100, PETRI_TRANSITIONS=40} [2024-06-21 17:13:11,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-21 17:13:11,761 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 40 transitions, 224 flow [2024-06-21 17:13:11,761 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) [2024-06-21 17:13:11,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:11,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:11,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:13:11,761 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:11,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1307289944, now seen corresponding path program 3 times [2024-06-21 17:13:11,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:11,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546872427] [2024-06-21 17:13:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:11,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:13,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546872427] [2024-06-21 17:13:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546872427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121383213] [2024-06-21 17:13:13,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:13,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:13,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:13,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:13,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 40 transitions, 224 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) [2024-06-21 17:13:13,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:13,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:13,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:13,824 INFO L124 PetriNetUnfolderBase]: 77/184 cut-off events. [2024-06-21 17:13:13,824 INFO L125 PetriNetUnfolderBase]: For 4718/4720 co-relation queries the response was YES. [2024-06-21 17:13:13,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 184 events. 77/184 cut-off events. For 4718/4720 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 620 event pairs, 8 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 634. Up to 96 conditions per place. [2024-06-21 17:13:13,825 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 28 selfloop transitions, 11 changer transitions 10/53 dead transitions. [2024-06-21 17:13:13,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 53 transitions, 350 flow [2024-06-21 17:13:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 17:13:13,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 17:13:13,826 INFO L175 Difference]: Start difference. First operand has 100 places, 40 transitions, 224 flow. Second operand 11 states and 130 transitions. [2024-06-21 17:13:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 53 transitions, 350 flow [2024-06-21 17:13:13,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 53 transitions, 324 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 17:13:13,829 INFO L231 Difference]: Finished difference. Result has 78 places, 36 transitions, 203 flow [2024-06-21 17:13:13,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=203, PETRI_PLACES=78, PETRI_TRANSITIONS=36} [2024-06-21 17:13:13,829 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-21 17:13:13,830 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 36 transitions, 203 flow [2024-06-21 17:13:13,830 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) [2024-06-21 17:13:13,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:13,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:13,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:13:13,830 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:13,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1601760656, now seen corresponding path program 4 times [2024-06-21 17:13:13,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:13,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715900690] [2024-06-21 17:13:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:13,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:15,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:15,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715900690] [2024-06-21 17:13:15,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715900690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:15,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:15,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044516594] [2024-06-21 17:13:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:15,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:15,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:15,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:15,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 36 transitions, 203 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) [2024-06-21 17:13:15,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:15,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:15,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:15,659 INFO L124 PetriNetUnfolderBase]: 66/161 cut-off events. [2024-06-21 17:13:15,659 INFO L125 PetriNetUnfolderBase]: For 2682/2684 co-relation queries the response was YES. [2024-06-21 17:13:15,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 575 conditions, 161 events. 66/161 cut-off events. For 2682/2684 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 509 event pairs, 17 based on Foata normal form. 8/169 useless extension candidates. Maximal degree in co-relation 548. Up to 92 conditions per place. [2024-06-21 17:13:15,660 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 24 selfloop transitions, 7 changer transitions 13/48 dead transitions. [2024-06-21 17:13:15,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 48 transitions, 317 flow [2024-06-21 17:13:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 17:13:15,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 17:13:15,661 INFO L175 Difference]: Start difference. First operand has 78 places, 36 transitions, 203 flow. Second operand 11 states and 127 transitions. [2024-06-21 17:13:15,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 48 transitions, 317 flow [2024-06-21 17:13:15,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 48 transitions, 287 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 17:13:15,663 INFO L231 Difference]: Finished difference. Result has 72 places, 31 transitions, 164 flow [2024-06-21 17:13:15,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=164, PETRI_PLACES=72, PETRI_TRANSITIONS=31} [2024-06-21 17:13:15,664 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 17:13:15,664 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 31 transitions, 164 flow [2024-06-21 17:13:15,664 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) [2024-06-21 17:13:15,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:15,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:15,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:13:15,664 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:15,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash -167923090, now seen corresponding path program 5 times [2024-06-21 17:13:15,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:15,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012504165] [2024-06-21 17:13:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:15,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:17,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:17,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012504165] [2024-06-21 17:13:17,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012504165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:17,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:17,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840542507] [2024-06-21 17:13:17,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:17,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:17,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:17,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:17,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:17,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 31 transitions, 164 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) [2024-06-21 17:13:17,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:17,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:17,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:17,486 INFO L124 PetriNetUnfolderBase]: 57/140 cut-off events. [2024-06-21 17:13:17,486 INFO L125 PetriNetUnfolderBase]: For 1964/1966 co-relation queries the response was YES. [2024-06-21 17:13:17,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 140 events. 57/140 cut-off events. For 1964/1966 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 401 event pairs, 15 based on Foata normal form. 8/148 useless extension candidates. Maximal degree in co-relation 462. Up to 74 conditions per place. [2024-06-21 17:13:17,486 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 19 selfloop transitions, 4 changer transitions 17/44 dead transitions. [2024-06-21 17:13:17,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 272 flow [2024-06-21 17:13:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 17:13:17,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 17:13:17,487 INFO L175 Difference]: Start difference. First operand has 72 places, 31 transitions, 164 flow. Second operand 11 states and 126 transitions. [2024-06-21 17:13:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 44 transitions, 272 flow [2024-06-21 17:13:17,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 44 transitions, 246 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 17:13:17,489 INFO L231 Difference]: Finished difference. Result has 64 places, 25 transitions, 121 flow [2024-06-21 17:13:17,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=121, PETRI_PLACES=64, PETRI_TRANSITIONS=25} [2024-06-21 17:13:17,489 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-21 17:13:17,489 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 25 transitions, 121 flow [2024-06-21 17:13:17,489 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) [2024-06-21 17:13:17,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:17,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:17,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:13:17,490 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:17,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1095509588, now seen corresponding path program 6 times [2024-06-21 17:13:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:17,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353554712] [2024-06-21 17:13:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:19,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353554712] [2024-06-21 17:13:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353554712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:19,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:19,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402434729] [2024-06-21 17:13:19,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:19,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:19,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:19,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:19,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 25 transitions, 121 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) [2024-06-21 17:13:19,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:19,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:19,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:19,445 INFO L124 PetriNetUnfolderBase]: 44/109 cut-off events. [2024-06-21 17:13:19,445 INFO L125 PetriNetUnfolderBase]: For 1352/1356 co-relation queries the response was YES. [2024-06-21 17:13:19,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 109 events. 44/109 cut-off events. For 1352/1356 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 260 event pairs, 15 based on Foata normal form. 10/119 useless extension candidates. Maximal degree in co-relation 356. Up to 52 conditions per place. [2024-06-21 17:13:19,446 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 16 selfloop transitions, 7 changer transitions 10/37 dead transitions. [2024-06-21 17:13:19,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 37 transitions, 213 flow [2024-06-21 17:13:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 17:13:19,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 17:13:19,447 INFO L175 Difference]: Start difference. First operand has 64 places, 25 transitions, 121 flow. Second operand 11 states and 122 transitions. [2024-06-21 17:13:19,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 37 transitions, 213 flow [2024-06-21 17:13:19,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 37 transitions, 193 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:13:19,448 INFO L231 Difference]: Finished difference. Result has 54 places, 22 transitions, 104 flow [2024-06-21 17:13:19,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=104, PETRI_PLACES=54, PETRI_TRANSITIONS=22} [2024-06-21 17:13:19,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 17:13:19,448 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 22 transitions, 104 flow [2024-06-21 17:13:19,449 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) [2024-06-21 17:13:19,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:13:19,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:19,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:13:19,449 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 17:13:19,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:13:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash 355362744, now seen corresponding path program 7 times [2024-06-21 17:13:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:13:19,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437674902] [2024-06-21 17:13:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:13:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:13:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:13:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:13:20,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:13:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437674902] [2024-06-21 17:13:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437674902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:13:20,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:13:20,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:13:20,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983155258] [2024-06-21 17:13:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:13:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:13:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:13:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:13:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:13:20,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 17:13:20,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 22 transitions, 104 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) [2024-06-21 17:13:20,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:13:20,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 17:13:20,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:13:21,122 INFO L124 PetriNetUnfolderBase]: 22/63 cut-off events. [2024-06-21 17:13:21,123 INFO L125 PetriNetUnfolderBase]: For 380/380 co-relation queries the response was YES. [2024-06-21 17:13:21,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 63 events. 22/63 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 6/69 useless extension candidates. Maximal degree in co-relation 162. Up to 24 conditions per place. [2024-06-21 17:13:21,123 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-21 17:13:21,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 30 transitions, 150 flow [2024-06-21 17:13:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:13:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:13:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 17:13:21,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33724340175953077 [2024-06-21 17:13:21,124 INFO L175 Difference]: Start difference. First operand has 54 places, 22 transitions, 104 flow. Second operand 11 states and 115 transitions. [2024-06-21 17:13:21,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 30 transitions, 150 flow [2024-06-21 17:13:21,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 118 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-21 17:13:21,125 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2024-06-21 17:13:21,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=32, 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=42, PETRI_TRANSITIONS=0} [2024-06-21 17:13:21,125 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-21 17:13:21,125 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2024-06-21 17:13:21,125 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) [2024-06-21 17:13:21,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 17:13:21,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 17:13:21,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 17:13:21,129 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 17:13:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:13:21,130 INFO L445 BasicCegarLoop]: Path program histogram: [19, 13, 11, 10, 8, 7, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:13:21,133 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 17:13:21,133 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 17:13:21,136 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 17:13:21,136 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 17:13:21,137 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 05:13:21 BasicIcfg [2024-06-21 17:13:21,137 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 17:13:21,140 INFO L158 Benchmark]: Toolchain (without parser) took 155111.27ms. Allocated memory was 167.8MB in the beginning and 973.1MB in the end (delta: 805.3MB). Free memory was 106.0MB in the beginning and 609.5MB in the end (delta: -503.5MB). Peak memory consumption was 303.6MB. Max. memory is 16.1GB. [2024-06-21 17:13:21,140 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 167.8MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:13:21,140 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 167.8MB. Free memory is still 111.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 17:13:21,141 INFO L158 Benchmark]: CACSL2BoogieTranslator took 670.66ms. Allocated memory is still 167.8MB. Free memory was 105.3MB in the beginning and 71.0MB in the end (delta: 34.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-06-21 17:13:21,142 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.52ms. Allocated memory is still 167.8MB. Free memory was 71.0MB in the beginning and 68.2MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 17:13:21,142 INFO L158 Benchmark]: Boogie Preprocessor took 47.10ms. Allocated memory is still 167.8MB. Free memory was 68.2MB in the beginning and 64.7MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 17:13:21,142 INFO L158 Benchmark]: RCFGBuilder took 856.76ms. Allocated memory was 167.8MB in the beginning and 213.9MB in the end (delta: 46.1MB). Free memory was 64.7MB in the beginning and 128.7MB in the end (delta: -64.0MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2024-06-21 17:13:21,142 INFO L158 Benchmark]: TraceAbstraction took 153479.69ms. Allocated memory was 213.9MB in the beginning and 973.1MB in the end (delta: 759.2MB). Free memory was 128.7MB in the beginning and 609.5MB in the end (delta: -480.8MB). Peak memory consumption was 279.4MB. Max. memory is 16.1GB. [2024-06-21 17:13:21,143 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 167.8MB. Free memory is still 102.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.18ms. Allocated memory is still 167.8MB. Free memory is still 111.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 670.66ms. Allocated memory is still 167.8MB. Free memory was 105.3MB in the beginning and 71.0MB in the end (delta: 34.3MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.52ms. Allocated memory is still 167.8MB. Free memory was 71.0MB in the beginning and 68.2MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.10ms. Allocated memory is still 167.8MB. Free memory was 68.2MB in the beginning and 64.7MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 856.76ms. Allocated memory was 167.8MB in the beginning and 213.9MB in the end (delta: 46.1MB). Free memory was 64.7MB in the beginning and 128.7MB in the end (delta: -64.0MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * TraceAbstraction took 153479.69ms. Allocated memory was 213.9MB in the beginning and 973.1MB in the end (delta: 759.2MB). Free memory was 128.7MB in the beginning and 609.5MB in the end (delta: -480.8MB). Peak memory consumption was 279.4MB. 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: 153.4s, OverallIterations: 103, TraceHistogramMax: 1, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 42.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5890 SdHoareTripleChecker+Valid, 24.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4929 mSDsluCounter, 3576 SdHoareTripleChecker+Invalid, 20.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3235 mSDsCounter, 920 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37483 IncrementalHoareTripleChecker+Invalid, 38403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 920 mSolverCounterUnsat, 341 mSDtfsCounter, 37483 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1093 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 35.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1491occurred in iteration=68, InterpolantAutomatonStates: 960, 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, 108.9s InterpolantComputationTime, 1677 NumberOfCodeBlocks, 1677 NumberOfCodeBlocksAsserted, 103 NumberOfCheckSat, 1574 ConstructedInterpolants, 0 QuantifiedInterpolants, 78359 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 103 InterpolantComputations, 103 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 17:13:21,193 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